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TMB11/TS03 DECmagtape system user`s manual

1. 2 13 Securing TMB11 TS03 Cables 2 14 Power Connection Diagram 2 15 Tape Threading Diagram 3 1 Controls and Indicators or are 2 23 3 2 Opening Head Shield 4 3 Reference Bdse of Tape X 24 ee he Pe abend Bi A 1 Track Bit Weight Relationship for 9 Channel Transport 2 Data Recording Scheme A 3 Tape Recording Format 4 T Channel Tape Format us se red zes 23 aca eh ow 5 9 Channel Tape Formal w na nn 4 6 Front Panel Parts Identification B 2 Tape Transport Parts Identification Top View ie Sse ee ver Pe ne B 4 Tape Transport Parts Identification Rear View B 5 Location of Read Write and Erase Heads and Tape Cleaner C 3 Proper Ceramic Washer Positioning di 3 TS03 Tape Head Assembly 4 Table No 1 1 1 2 2 1 4 1 A 1 A 2 A 3 B 1 B 2 B 3 B 4 B 5 B 6 B 7 B 8 Title Page Controller Function E A A en t 1 6 Applicable Documents 1 11 70 10570 Cable 2 2 13 Customer Care Operations 4 3 Five Character Record gt aos den A ee
2. 11 001 TMB11 TS03 DECmagtape system user s manual TMB 11 M system digital equipment corporation maynard massachusetts Ist Edition November 1976 Copyright O 1976 by Digital Equipment Corporation The material in this manual is for informational purposes and is subject to change without notice Digital Equipment Corporation assumes no respon sibility for any errors which may appear in this manual Printed in U S A This document was set on DIGITAL s DECset 8000 computerized typesetting system The following are trademarks of Digital Equipment Corporation Maynard Massachusetts DEC DECtape DECCOMM DECUS RSTS DECsystem 10 DIGITAL 8 DECSYSTEM 20 MASSBUS 11 UNIBUS CHAPTER 1 1 1 p gt 2 2 N 2 24121 25132 2152 27 2 2 1 2222 2 3 2 4 2 9 251 2 912 2 5 2 1 PI 2542 3 2 5 2 4 2 5 2 5 2 919 2 6 CHAPTER 3 3 1 3 2 3 2 1 3 2 2 3 2 3 3 2 4 3 215 3 2 6 CONTENTS Page GENERAL INFORMATION INTRODUCTION TID 1 1 GENERAL DESCRIPTION owed a a a 1 1 System Configuration x a 1 1 Physical Description a rs 1 2 SYSTEM FUNCTIONAL DESCRIPTION 1 6 APPLICABLE DOCUMENTS 1 11 SPECIFICATIONS Ee tr a ee da A E 1 12 UNPACKING INST
3. es cde A 3 3 111 CHAPTER 4 4 1 4 2 4 3 4 3 1 4 3 2 4 3 3 APPENDIX A 1 2 A 2 1 A 2 2 A 2 3 A 3 A 4 5 APPENDIX 2 APPENDIX 1 52 2 1 5 2 2 C23 C 2 4 C25 CONTENTS Cont Page CUSTOMER CARE AND PREVENTIVE MAINTENANCE CUSTOMER RESPONSIBILITIES 4 1 CARE OF MAGNETIC TAPE POTITI 4 2 CUSTOMER PREVENTIVE MAINTENANCE OF TS03 TAPE TRANSPORT 4 2 General TN PES ak SY cas efe eer ar ai 4 2 Preventive Maintenance 0 8 a ee ee ee 4 2 Materials Required x uz Rey S 4 3 MAGNETIC FUNDAMENTALS MAGNETIC TAPE FUNDAMENTALS DEFINITIONS A 1 RECORDING METHODS AND DECmagtape FORMATS A 2 NRZI Recording Method A 3 9 Channel Tape Format 4 7 Channel Tape Format A 5 CYCLIC REDUNDANCY CHECK CRC CHARACTERS A 6 LONGITUDINAL REDUNDANCY CHECK LRC CHARACTER A 8 DATA ORILES OSE ESOS A 8 TRACK ASSIGNMENTS A 8 TMB11 TS03 SYSTEM PARTS LIST ISO PARIS zorra ds Boe S ee eS a E B 1 PENG REAR AGS mins CA SU B 9 MAGNETIC TAPE DRIVE CLEANING INSTRUCTIONS DIGITAL S MAGNETIC TAPE DRIVE CLEANING KIT C 2 THE CARE AND CLEANING OF DIGITAL S MAGNETIC TAPE DRIVES CZ Cleaning the TUl6
4. SLAVE BUS CABLE M930 TERMINATOR 11 3999 Figure 2 11 I O Cable Connection Diagram Table 2 1 70 10570 Cable Connections From To M8920 Adapter Board TS03 Master TS03 Slave Connector Connector Connector 6 Remove one screw from each of the three cable strain reliefs and loosen the other Figure 2 12 7 Swing the strain reliefs out and place the BC11A cables up against the edge of the chassis Leave enough slack so that the cables are not strained when the M8920 module is swung down 8 Swing the top of the strain reliefs back into place 9 Insert the removed screws and tighten all screws 2 13 10 11 12 13 14 15 STRAIN RELIEFS 3 7941 3 Figure 2 12 Securing TMB11 TS03 Cables Feed the M8920 power harness over the hinged edge of the M8920 module Connect the harness to the fast on connectors on the M8920 The color code for the con nections is 5 V red AC LO yellow GND black Neatly dress all cables Leave service loops so TSQ3 transports can be extended from the cabinet and the M8920 adapter can be swung down on its hinges Swing the M8920 module up into position and secure it with the two knurled screws Replce the M8920 front cover Slide in the TSO3 drawer Plug the TS03 master and slave transport ac power cords into the 861 power control switch ed receptacle as shown in Figure 2 13 2 14 TSO3 MASTER TSO3 M TSO3 SLAVE 7503 5 TRANSPORT REAR VIEW T
5. 29 21935 29 21936 29 21937 29 21938 29 21939 29 21940 B 8 Table 7 DEC Vendor TS03 Transport Part Numbers Description Tape Path Alignment Tool Tape Guide Head Assembly File Protect Assembly Tape Cleaner Assembly Read Preamplifier Module Ramp Generator Module Control Terminator Module Interface Control Module Tape Motion Control Sense Amplifier Driver Module m Write Amplifier 4 Channel Module Write Amplifier 5 Channel Module Data Terminator Module Quad Read Amplifier Module Read Amplifier Clip Control Module Mag Pot PLB Servo Preamplifier Module Voltage Regulator PCB Timing Delay Module Test Panel LED Display Voltage Regulator Servo Power Amplifier Module Extender Tension Roller Capstan Motor Spring O Ring Mag Pot Reel Motor Switch Broken Tape Sensor Tape Photo Sensor Switch Reel Drive Belt Supply Reel Drive Belt Take Up Bearing Bearing Capstan Puller Table 7 DEC Vendor TS03 Transport Part Numbers Cont Vendor Number DEC Number Description 190 4474 601 29 21941 Transformer 148 0114 001 29 21942 LED Fairchild FLV 102 148 0108 001 29 21943 Diode MR751 148 0122 001 29 21944 Power Transistor MJ802 151 0802 002 29 21945 Fuse Holder 115 3625 199 29 21946 Capacitor 18K or larger 115 3610 449 29 21947 Capacitor 40K or larger 198 0100 001 29 21964 Hub Repair Kit 148 0121 001 29 10334 Power Transistor MJ4502 148 0075 001
6. A 7 CRC Character in Register When Writing A 7 Track Assignments for Data and Parity A 8 Illustrated Parts Breakdown for Figure E B 3 Illustrated Parts Breakdown for Figure E2 B 4 Illustrated Parts Breakdown for Figure B 5 Replaceable Spare Parts for Figure E B 6 Replaceable Spare Parts for Figure E2 B 7 Replaceable Spare Parts for Figure B 7 DEC Vendor TS03 Transport Part Numbers B 8 TMB11 Replaceable Spare Parts B 9 11 503 DECmagtape System x 7461 10 7447 2 TMB11 TS03 DECmagtape Systems _ CHAPTER 1 GENERAL INFORMATION 1 1 INTRODUCTION The TMB11 MA MB DECmagtape System TMB11 TS03 t is a magnetic tape storage system that interfaces with the PDP 11 family of processors and peripherals and provides storage for digital infor mation The system reads and records digital data in parallel in a 9 channel 800 bpi industry compatible NRZI format 1 2 GENERAL DESCRIPTION 1 2 1 System Configuration The TMB11 TSO3 DECmagtape System is composed of the TMB11 Controller and the TS03 M Mas ter Tape Transport The master tape transport is made up of a slave transport and an M8920 Adapter Module A second slave transport TS03 S can be added that will interface with the adapt er module conta
7. BOT GAP 3 CH ARACTER CHARACTER CHARACTER DATA PERIODS PERIODS TAG RECORD 11 0392 5 ae lo b ab o lo s a a eh c nd B a ll o 4 ce 9 8 7 6 5 4 3 2 1 _ 1 4 Figure A 6 9 Channel Tape Format A 3 CYCLIC REDUNDANCY CHECK CRC CHARACTERS The CRC character provides a method of error detection and correction on magtape transports The code has nine check bits that form a check character at the end of each record To perform a correc tion a record in which an error has been detected must be reread into memory with the LRC and CRC characters for program evaluation Errors involving more than one track can be detected but not corrected The CRC character is generated as follows l The CRC register is cleared at the beginning of each record As each data bit is written on tape it is exclusively ORed with its corresponding bit in the CRC register 2 The CRC register is shifted one position to the right after the exclusive OR operation has taken place 3 The bits entering CRC 2 CRC 3 CRC 4 and CRC 5 of the CRC register are inverted if the bit entering CRCP is a 1 Data is shown in Table A 1 the resultant CRC character is shown in Table A 2 Table A 1 Five Character Record Characters Data Data Data 02 Data Data Bit Character 0 Character 2 Chara
8. CRC and LRC errors and asserts 1 to the done logic if an error condition exists Some types of errors warrant terminating operation before it is completed while others will wait until the end of the operation before asserting ERR 1 The processor can read the TMB11 registers by addressing the registers and requesting an in transfer with respect to the processor via the BUS bits The address decoder then asserts SEL IN for the particular register selected which gates the register bits out to the data bus via the register select output multiplexer 14 APPLICABLE DOCUMENTS Table 1 2 lists PDP 11 documents that are applicable to the 1 TS03 DECmagtape System Table 1 2 Applicable Documents Title Description PDP 11 Processor A series of maintenance and theory manuals that and Systems Manual PDP 11 Processor Handbook PDP 11 Peripherals Handbook DIGITAL Logic Handbook 1973 74 Edition Paper Tape Software Programming Handbook provide a detailed description of the basic PDP 11 system A general handbook that discusses system archi tecture addressing modes the instruction set programming techniques and software A handbook devoted to a discussion of the vari ous peripherals used with PDP 11 systems It also provides detailed theory flow and logic descriptions of the Unibus and external device logic methods of interface construction and examples of typical interfa
9. DECODER SELECT TMB11 REGISTERS BUS SSYN M795 IS 092 007 lt lt lt RN N SEL 3 IN OUT SEL 4 IN OUT HI DATA BYTE BUS ABB A18 SS READ BYTE 2 Y Y Yj 7 SEL 5 IN OUT DATA BUS SELECT 10 DATA BYTE M105 M7912 M7912 Y Y Y Q ro r lt UNIBUS 77 Ga RECEIVERS _ 2 M7912 E TMB 11 Figure 1 5 TMBI11 TSO3 Functional Block Diagram Sheet 1 of 2 1 8 1 14 BUS MSYN DATA STB 2 p Y Y M795 Y 7 Y BUS SSYN e 2 _ Y 2 ZZZZCHAN Y CHAN 7 77 M7912 DECODER ur M7911 READ WRITE WRITE WOR WRITE DATA READY CARRY OUT 2 LOGIC M7911 SEL SEL 2 START OPERATION LOGIC M7911 RDS READ LOAD TRANSPORT RECEIVERS M7912 ERR t ERROR MEE LOGIC LRCS I M7911 EOT WRL SDWN w7 912 LLL ORNERS LLL UG O o ES O a w 11 3988 C SEE m EVEN PARITY WD3 PARITY 13 11 ES N f f 222 7227777 S SS 7 LL 11 by WRITE TROB Cy SET READ WRITE READING H GEN E LRCS WRS MOTION SHUTDOWN R RD CONTROL COUNTER es O 7 9 8 RD STRB TAPE MAR 22 SG COUNTER TIME 5 PULSE STROBE PL
10. Installation Extend the expander box on its slides and remove the module access cover An extended l and BAIIF box is shown in Figure 1 2 2 Instal la TMBI1 system unit into the expander box using the two captive screws Figure 2 TMB11 BACKPLANE POWER TERMINALS M8920 POWER HARNESS 70 13008 OPTION POWER HARNESS 70 09559 AC LO YELLOW CAPTIVE SCREWS 2 5 V RED GND BLACK TMB11 SYSTEM UNIT Figure 2 4 Expander Box Backplane BA11F box shown Install the option power harness by connecting the fast on connectors to the system unit backplane and the harness plug s to the expander box Figure 2 5 Install the M8920 power harness by connecting the three fast on connectors as shown in Figure 2 4 The harness color code is 5V red ACLO yellow GND black Dress the M8920 power harness along the top of the BA11F expander box as shown in Figure 2 5 If a BA11K box is used dress the harness underneath the expander box M8920 POWER HARNESS 2012008 OPTION POWER HARNESS PLUGS OPTION 7997 4 POWER HARNESS 70 09559 Figure 2 5 Power Cabling of TMB11 System Unit in BA11F Box 2 5 2 2 Module Installation 1 Check the jumpers on the M7821 module for a bus interrupt address of 224 2 Check the priority jumper on the M7912 module for the correct interrupt priority level usually BRS 3 Check the jumpers on the M105 module for the correct address range for the TMBil regis ters 77
11. are most useful What faults do you find with the manual Does this manual satisfy the need you think it was intended to satisfy Does it satisfy your needs WCW Would you please indicate any factual errors you have found Please describe your position AAA Department uuu City Sue a WR State Zip or Country FIRST CLASS PERMIT NO 33 MAYNARD MASS BUSINESS REPLY MAIL NO POSTAGE STAMP NECESSARY IF MAILED IN THE UNITED STATES Postage will be paid by Digital Equipment Corporation Technical Documentation Department Maynard Massachusetts 01754
12. cable connectors will plug into the system units either way but will not fully seat if incorrectly installed Make sure the connectors are fully seated and that the notches on the connector edges are up against the system unit slots 2 5 2 4 Slave Bus Cabling Connect the BC11A slave bus cable to slots E4 and F4 on the system unit Figure 2 9 Install an M930 terminator module into slots E3 and F3 to terminate the slave bus Figure 2 6 and engineering drawing 1 0 7 2 5 2 5 Securing Cables If the installation is performed in a BA11F expander box lift the cable trough cover and feed the BC11A cable s through the trough and the cable holding bracket If the installation is performed in a BA11K expander box perform the following 1 Remove one screw from the center strain relief and loosen the other Figure 2 6 2 Swing the strain relief out and place the BC11A cable s up against the edge of the chassis 3 Swing the top of the strain relief back into place 4 Insert the removed screw and tighten both screws 2 8 CABLE STRAIN RELIEF BC11A UNIBUS OUT CABLE M7821 M796 M795 M105 BC11A CABLE TO TRANSPORT M930 M7912 M7911 Figure 2 6 11 Module Location and Cabling in BA11K Box M920 M920 M7912 M7821 M796 M795 M105 BC11A CABLE TO TAPE TRANSPORT M7911 M930 NOT SHOWN 7997 1 Figure 2 7 TMB11 Module Location and Cabling in BA11F
13. consists of cleaning only a few items but the cleanliness of these items is very important to proper tape transport operation The frequency of performance will vary somewhat with the envi ronment and degree of use of the transport Therefore a rigid schedule applying to all machines is difficult to define The recommended periods apply to units in constant operation in ordinary environ ments They should be modified if experience shows other periods are more suitable Table 4 1 con tains the cleaning instructions Before performing any cleaning operation remove the supply reel and store it properly All items in the tape path must be cleaned on a per shift basis In cleaning it is important to be thorough yet gentle and to avoid certain dangerous practices It should be remembered that the tape cleaner is a strong cleaning agent and should not come in contact with painted surfaces or plastic Refer to Appendix C for additional magnetic tape drive cleaning instructions CAUTION Do not use acetone or lacquer thinner aerosol spray cans rubbing alcohol or excessive cleaner Be extremely careful not to allow the cleaner to pene trate ball bearings tension rollers and motors 4 2 4 3 3 Materials Required 1 2 Frequency Once per Shift Weekly Monthly DECmagtape system and magtape cleaning kit Lint free wipers Table 4 1 Customer Care Operations Operation Using cotton tipped wooden swabs moistened with head clean
14. for the tape transport and asserts the GO bit to the start logic When the start logic senses that the tape transport has been selected SELR and is ready TUR it asserts SET to the transport to start the operation If a read operation is commanded the transport command buffer asserts FWD MOTION to the motion control logic which drives the capstan servo and moves the tape forward When the tape is up to speed the transport read logic is enabled and starts to receive data from the read heads The read data out of the read logic RDO RD7 RDP is checked for CRC LRC and vertical parity errors If any such errors are detected the error logic is notified CRCE LRCE VPE for appropriate corrective action The read data is supplied to the controller along with a read strobe RDS which signifies the avail ability of read data from the transport RDO RD7 becomes CHANO CHANT and is gated to the data buffer register where it is loaded into the register by RDS RDS also requests an NPR transfer from the NPR logic When the request is granted BUS BBSY is asserted by the logic along with DATA BUS which gates the output of the data buffer to the Unibus data bus BUS D00 D15 via the register select output multiplexer DATA gt BUS accomplishes this by asserting either HI DATA BYTE or LO DATA BYTE from the read byte select logic according to whether the CMA register is addressing the low byte or the high byte in memory Thus the data byte from
15. normally stated in inches per second 11 Tape Density The density of sequential characters on the tape It is normally specified in bytes per inch bpi which is equivalent to characters per inch 12 Write Enable Ring A rubber ring that must be inserted on the supply reel to allow the transport to write on the particular tape This safety feature helps prevent accidental destruction of previously recorded data 13 Tape Mark TM A record written on the tape to designate the end of a file sometimes referred to as a file mark FMK A 2 RECORDING METHODS AND DECmagtape FORMATS The DECmagtape system is an on line mass storage system for programs or data Data is recorded on tape in vertical rows called characters Each character consists of eight data bits and one vertical parity bit The vertical parity bit is program selected as even or odd The odd parity bit guarantees that each character records at least one 1 bit EN j The parity bit is generated according to the rule that the number of 16 in a character parity bit included is odd or even For example if odd parity is used and the character contains an even number of 1 bits the parity bit is generated as a 1 bit and an odd number of 1 bits are recorded then if an even number of bits are read back from tape a vertical parity error is generated to notify the program that the data is in error A 2 The data characters are recorded in blocks of characters termed r
16. replaceable part l or part number see Replaceable Parts List Table B 4 B 3 3 4 6 2 7 8 9 101112 1 5 13 14 15 15 16 17 18 7856 9B Figure B 2 Tape Transport Parts Identification Top View Table B 2 Illustrated Parts Breakdown for Figure B 2 Description 1 190 4442 001 Power Supply Card Cage Assembly 2 Transformer Assembly 3 Capacitor 18 000 mF 25 V 4 Capacitor 39 000 10 V 5 190 4206 001 Motherboard Assembly 6 i Rectifier 7 j Servo Preamplifier Module 8 Sensor Amplifier Driver Module 9 Ramp Generator Module di Pushbutton Control Module Control Interface Module 190 384 1 001 Control Terminator Module 7 Delay Timing Module Read Amplifier Clipping Control Module T Quad Read Amplifier Module 190 3860 001 Data Terminator Module Four Channel Write Amplifier Module Five Channel Write Amplifier Module Indicates replaceable part For part number see Table B S B 4 7 5 4 3 7856 4A Figure B 3 Tape Transport Parts Identification Rear View Table B 3 Illustrated Parts Breakdown for Figure B 3 Item Part No Description 1 Voltage Regulator Servo Power Assembly 2 190 4352 001 Voltage Regulator PC Board Assembly Note 1 3 127 0003 001 Power Receptacle 4 Fuscholder 4 Fuse 3 115 V operation 4 Fuse 3AG 1 5 A 220 230 V operation 5 Switch 115 220 V s 6 Power Cord not shown 7 148 0122 001 Power Transistor Type MJ802 Motorola Note 1 8 148 0121 001
17. switch to ON to apply ac power to the transport UNIT SELECT WRITE ENABLE mo LING O mom L 11 3045 3 2 3 Tape Loading Pressing the LOAD pushbutton energizes the reel servos and initiates a load sequence Tape advances to the load point marker and stops If for some reason the load point marker is already past the sensor as for example in restoring power after a shutdown tape will continue to move U nder these condi tions press LOAD and then REWIND and the tape will rewind to the load point Once pressed the LOAD switch is illuminated and is inactive m power has been turned off or tape is removed from the machine 3 2 4 Placing Tape Unit On Line After the tape is properly threaded and has been loaded and brought to the load point press the ON LINE pushbutton and check that the ON LINE indicator illuminates The REWIND pushbutton is disabled when the tape unit is on line On line status enables the tape unit to be remotely selected and UNIT SELECT Plug One of two plugs can be inserted des ignating unit as O or 1 NOTE In a single drive sytem the drive is always designated as drive O in a dual drive system either drive can be designated as drive O WRITE ENABLE Indicator Illuminated whenever a reel with a write enable ring is mounted on the supply hub ON LINE Pushbutton Indicator A momentary pushbutton which functions as alternate action When first activated the
18. the data buffer will output on either BUS D00 D07 or BUS D08 D15 The next character read will output on the alternate half of the data bus When the NPR logic receives BUS SSYN from the memory it asserts NPR CLEAR BBSY which increments the byte record counter and the CMA register to prepare for the next transfer If a write operation is commanded by the command register the GO BIT in addition to enabling the start operation logic requests an NPR transfer from the NPR logic When the request is granted the logic asserts BUS BBSY and BUS MSYN The memory responds with SSYN to indicate that the first data character is on the data bus BUS D00 D15 The NPR logic asserts DATA STB 2 which loads the data character into the data buffer thus making it available to the transport as WDO WD7 data character enters the data buffer via one of two gates In the write mode CMA BIT 00 asserts either SEL LO BYTE or SEL HI BYTE according to whether the CMA register is addressing the low byte or the high byte in memory thereby enabling the gate corresponding to the location of the character on the data bus Meanwhile the start operation logic has asserted SET to the transport which as in a read operation will cause the transport command buffer to assert FWD MOTION and start the capstan servo system moving forward When the tape is up to speed writing of the data characters begins WDR write data ready from the controller inhibits the transport shu
19. 2520 to 772536 4 Plug the six TMB11 modules and a M930 terminator module into the system unit according to Figures 2 6 2 7 and engineering drawing BD TM B1 1 0 7 2 5 2 3 Unibus Cabling System units are connected to the Unibus in daisy chain fashion as shown Figure 2 8 Each unit has a Unibus in and a Unibus out jack A BC11A cable connects the Unibus into the first system unit M920 jumper modules connect the Unibus to the other system units in a given configuration An M930 terminator module is installed in the Unibus out jack of the last system unit in the chain If the Unibus is to be carried onto another expander box a BC11A Unibus cable is used to connect the Unibus from the Unibus out connector of the last system unit in the first box to the Unibus in connector of the first system unit in the second box The Unibus is terminated by an M930 module installed in the out jack of the last system unit Install the Unibus in cable Unibus out cable M920 jumper and or M930 terminator according to the particular configuration The Unibus in connections on the TMB11 system unit are slots Al and Bl The Unibus out connections are slots 4 and B4 Figure 2 9 and engineering drawing BD TMBI 1 0 7 The configuration shown in Figure 2 6 utilizes a Unibus out cable and an M920 bringing the Unibus in from the next system device The configuration shown in Figure 2 7 uses M920 jumpers for both input and output Unibus connections NOTE BCI1A
20. 29 19037 Transistor 2N4910 148 0053 001 15 10008 Transistor 2N3055A 148 0102 003 15 10712 Transistor MJ 900 148 0102 004 15 10853 Transistor MJ 1000 198 0133 030 90 07217 Fuse 3 3 AG 115 V 198 0133 015 90 08388 Fuse 1 5 A 3 AG 230 V B TMB11 PARTS Table B 8 lists spare parts with part numbers for the TMB11 controller Table B 8 TMB11 Replaceable Spare Parts Item Part No Tape Drive Interface Module M7911 TMB11 Unibus Registers Module M7912 Address Selector Module M105 WC and CMA Module M795 Unibus Master Control Module M796 Interrupt Control Module M7821 Unibus Jumper Module M920 Unibus Terminator Module M930 Unibus Cable BC11A X Wired Assembly 11 70 12678 Captive Screws 2 90 08157 Option Harness RK11 D BA 11F Box 70 09559 Option Harness RK11 D BA11K Box 70 10117 Option Harness RK11 D BA11D Box 70 08992 Power Harness M 8920 70 13008 X length of cable in feet APPENDIX MAGNETIC TAPE DRIVE CLEANING INSTRUCTIONS DIGITAL S MAGNETIC TAPE DRIVE CLEANING KIT This DIGITAL Magnetic Tape Cleaning Kit has been carefully configured to provide you with cleaning materials that will not harm your tape equipment and will not leave any residue behind to interfere with data reliability The hints contained in the following few paragraphs will if heeded ensure that you get the very best results possible from this kit The FREON TF113 cleaning fluid in this kit is one of the safest and best degr
21. 8 0 oz 227 g 7 in 17 8 cm 3 69 in 9 37 cm diameter industry standard Mounts on slides in a standard 19 in 48 3 cm cabinet 10 1 2 in 26 7 cm panel height 17 in 43 cm deep 37 lb 16 7 kg Mounts in a single 16 1 2 X 2 1 4 in system unit 41 9 X 5 7 cm 5 A at 5 Vdc 2 A at 5 Vdc 1 at 90 to 132 Vac or 0 5 A at 180 to 264 Vac 47 to 63 Hz single phase 240 W at 115 Vac 120 W at 230 Vac 1 12 Operating Environment Temperature Relative humidity Altitude Miscellaneous BOT EOT detection Broken tape detection Magnetic head Interchannel Displacement Write Read Erase head Models TMB11 MA 1 TS03 MA TS03 MB TS03 SA TSO3 SB 15 C to 32 C 20 to 80 with maximum wet bulb 25 C and minimum dew point 2 C 8000 ft 2438 m Photoelectric sensing of reflective strip industry compatible Photoelectric Dual gap read after write 0 15 in 0 4 cm gap 150 pin 3 8 um maximum 150 3 8 um maximum Full width Tape drive and PDP 11 control 115 Vac 60 Hz Tape drive and PDP 11 control 230 Vac 50 Hz Master tape drive 115 Vac 60 Hz Master tape drive 230 Vac 50 Hz Slave tape drive 115 Vac 60 Hz Slave tape drive 230 Vac 50 Hz CHAPTER 2 UNPACKING INSTALLATION _ AND ACCEPTANCE TESTING 2 1 SITE PLANNING AND CONSIDERATIONS 2 1 1 Space Requirements Figure 2 1 illustrates the space and service clearances required Adequate space must be provid
22. 920 ADAPTER MODULE Figure 1 4 TS03 M Master Tape Transport with M8920 Adapter Module 1 3 SYSTEM FUNCTIONAL DESCRIPTION NOTE The 503 tape transport operates at only one density 800 bpi and in only one mode of operation 9 track Consequently the system discussion that fol lows is restricted to these system limitations The TMBII is capable of other densities and can operate in the 7 track normal and 7 track core dump modes The basic functions performed by the controller are off line read write write EOF space forward space reverse write with extended IRG and rewind Each of these functions is briefly described in Table 1 1 Function Off Line Read Write Write EOF Table 1 1 Controller Functions Description The off line function is used when it is desired to return control to the tape transport so that tape can be rewound reels changed etc without using processor time The off line function places the selected tape transport in the off line local mode and causes it to begin a rewind operation The controller cannot write on or read from the magnetic tape when the off line function is used This function permits reading from the magnetic tape During the read operation the data portion of the record is loaded into the controller data buffer for transfer to the memory The LRC and CRC characters are read but not transferred into memory This function permits writing on the magnetic tape
23. ALLATION AND ACCEPTANCE TESTING SITE PLANNING AND CONSIDERATIONS 2 1 Space Requirements zen ehe A A 2 1 Power Requirements 2 1 Environmental Requirements 2 1 UNPACKING 2 fin L ae te da e do Ok Z T ee 2 1 Cabinet Unpacking Instructions 2 1 Device Unpacking Instructions 2 3 INSPECTION u 4 we A ORC Bee e ed N 2 3 CABINET INSTALLATION SYSTEM ALREADY INSTALLED 2 3 INSTALLATION OF SYSTEM COMPONENTS 2 4 T8503 Mounting Instructions A MES 2 4 TMBllInstallation Cabling n 2 6 System Unit Installation 2 6 Module Installation 2 8 Unibus Cabling uou u oS Es 2 8 Slave Bus Cabling A 2 8 Securng Cables lt 2 oue d xen e A Ow Ee 8 2 8 TSO3SCADUIRE riera ed 2 12 ACCEPTANCE TESTING Cee ee era ee q 2 15 SYSTEM OPERATING INSTRUCTIONS CONTROL AND INDICATORS 3 1 OPERATING PROCEDURES 3 1 Tape Ihresdne 447433 xx A A e 3 1 POWer Up ds obe de Me Ae is ciet i Sa 3 Tape o ox 3 Sue OS Sog Eus 3 2 Placing Tape Unit On Line 3 2 Tape Rewind and Unloading 3 3 Power Shutdown s ase z x 2 2 2 20 Ge
24. Box 2 10 BC11A UNIBUS TO NEXT CABLE M930 EXPANDER UNIBUS BOX TERMINATOR IF USED MODULE M920 UNIBUS JUMPER MODULES SYSTEM UNITS Figure 2 8 Unibus Cabling 4 UNIBUS 1 OUT UNIBUS B4 IN NOT SHOWN E4 TAPE NOT TRANSPORT SHOWN 1 0 7941 1 Figure 2 9 TMB11 Mounted in System Unit 2 11 2 5 3 TS03 Cabling 1 Slide out the TS03 M drawer 2 Remove the M9820 front cover Figure 2 10 70 10570 CABLES TO M8920 TAPE POWER HARNESS TRANSPORT M8920 70 13008 FRONT COVER BC11A CABLE TO 11 KNURLED SCREW 2 H870 EDGE A CONNECTORS 7941 7 Figure 2 10 M8920 Cabling 3 Unscrew the two knurled screws holding the M8920 module and allow the module to hang down as shown in Figure 2 10 4 Connect the BC11A cable from the TMB11 system unit to the and D connectors the 8920 module using two H870 edge connectors 5 Install the 70 10570 master slave cables between the M8920 module connectors J1 through J6 and the TS03 master and slave transport connectors as listed in Table 2 1 and shown in Figures 2 10 and 2 11 2 12 TS 3 MASTER TSM3 M TS 3 SLAVE 5 3 5 TRANSPORT REAR VIEW J2 WRITE TRANSPORT REAR VIEW J2 WRITE Jf CONTROL UNIBUS IN BC11A CABLE OR M920 JUMPER UNIBUS OUT BCIIA CABLE M920 JUMPER OR M930 TERMINATOR TMB 11 SYSTEM UNIT EXPANDER BOX EDGE BOTTA EDGE CONNECTORS
25. During the write operation data from the bus is loaded into the controller data buffer register The controller then transfers the data to the tape transport write heads The necessary LRC and CRC char acters are generated by the master transport and written on the tape following the data The write function advances the tape one record This function writes an end of file EOF mark on the tape When selected this function erases a 3 in segment of tape prior to writing the first character The EOF mark and the associated LRC character are considered one record The EOF mark is an octal 23 character followed by an octal 23 LRC character Function Space Forward Space Reverse Write with Extended IRG Rewind Table 1 1 Controller Functions Cont Description This function is used to skip over a number of records to find a specific record on the tape When selected the space forward function causes the tape transport to advance a specified num ber of records The number of records is determined by the value in the byte record counter This value is loaded into the byte record counter by the program Space forward is used for tape positioning only and therefore does not affect information stored on the tape or in memory This function is identical to the space forward function except the tape moves in the reverse rather than in the forward direction This function is identical to the write function except that a 3 in
26. E AND CLEANING OF DIGITAL S MAGNETIC TAPE DRIVES C 2 Cleaning the TU16 and TU10 DECmagtape Drives l First dismount the tape from the unit 2 Clean the following components of these drives using a foam tipped swab soaked in cleaning fluid Figure C 1 Read write head Location A Erase head Location B Tape cleaner Location C Upper roller guide Location D Lower roller guide Location E careful to keep cleaning fluid only the tape bearing surface of roller guides to prevent degreasing the roller guide bearings 2 11 3357 Figure C 1 Location of Read Write and Erase Heads and Tape Cleaner 3 When cleaning the head area avoid the spring loaded ceramic washers on the tape drive assemblies If it appears necessary to run the swab over the tape bearing surface of these guides to remove oxide deposits do so however when cleaning is completed be sure that the washer is pressed snugly up against the tape guide surface and not hung up on its shaft Figure C 2 4 Next clean the vacuum pockets F and the inner surface of the vacuum door using a lint free wipe and cleaning fluid Pass another lint free wipe over the head using a polishing action to remove any remaining deposits CERAMIC WASHER HEAD PLATE THIS NOT THIS 11 4120 Figure C 2 Proper Ceramic Washer Positioning C 2 2 Cleaning the TS03 DECmagtape Drive 1 Remove the tape from the transp
27. ECmagtape transport are available the TS03 MA which requires 115 V 60 Hz primary power and the TS03 MB which requires 230 V 50 Hz primary power Both models also require 5 5 V at 3 A and an AC LO signal The TS03 S transport consists of a tape transport only In response to inputs from the master transport adapter it controls tape motion and records and reads data on magnetic tape The TS03 SA requires 115 V 60 Hz primary power and the TSO3 SB requires 230 V 50 Hz primary power 1 2 2 Physical Description The TMB11 Figure 1 2 consists of the following six modules M105 Address Selector Module M795 Word Count and Bus Address Module M796 Unibus Master Control M7821 Interrupt Control Module M7911 Tape Drive Interface M7912 TMB11 Unibus Registers QN tA gt The six modules are plugged into a 11 system unit that is mounted in an expander box Unibus input Unibus output and tape transport cabling also connect to the system unit The tape transport Figure 1 3 is a single rack mounted drawer with the M8920 Adapter Board mounted underneath on the master transports The adapter is a hex height module it is hinged at the front corners and swings down as shown in Figure 1 4 TMB11 MODULES 6 7941 6 A Installed in BA11K Expander Box TMB11 MODULES 6 7997 2 B Installed in BA11F Expander Box Figure 1 2 TMB11 Controller 1 3 TS03 MASTER TAPE TRANSPORT 7461 2 M8
28. Power Transistor Type MJ4502 Motorola Note 1 9 148 0102 003 Power Transistor Type MJ900 Motorola Note 1 10 148 0102 004 Power Transistor Type MJ1000 Motorola Note 1 11 148 0053 001 Power Transistor Type 2N3055 Note 1 12 148 0075 001 Power Transistor Type 2N4910 Note 1 NOTES l Normally voltage regulator servo power assembly is replaced as a module These parts are listed for reference purposes Indicates replaceable part For part number see Table B 6 B 5 Table B 4 Replaceable Spare Parts for Figure B 1 Description Qty Spare Note 198 4439 001 Control Panel Assembly 1 198 2771 Dust Cover Assembly 1 198 2605 001 Capstan Wheel 198 1509 001 Tape Guide Assembly 198 2399 010 Head Assembly Nine Track 198 2399 003 Head Assembly Seven Track 2 198 1138 001 Photosensor Assembly Load Point EOT 198 1139 001 Photosensor Assembly Broken Tape 198 2747 001 Tape Cleaner Assembly 198 264 77 002 Roller Guide Assembly 198 001 3 001 Magpot Tension Sensor Assembly includes Magpot Circuit Module 198 0017 002 Spring Tension package of 2 198 2827 001 Tension Arm Assembly 198 4438 001 Reel Motor Assembly 198 0101 001 Belt Kit 1 each supply takeup 198 2641 001 File Protect Switch Assembly 198 2484 001 Capstan Motor Assembly 198 3631 xxx Read Preamplifier Printed Circuit Board Assembly Unless specified control panels and dust covers will be shipped with standard paint colors If special p
29. RANSPORT REAR VIEW E E M8920 ADAPTER GND ACLO 5 SWITCHED AC POWER POWER HARNESS 70 13008 TMB11 PRIMARY TR AC POWER SYSTEM UNIT 861 POWER CONTROL 11 3998 Figure 2 13 Power Connection Diagram 2 6 ACCEPTANCE TESTING Perform the operating instructions contained in Chapter 3 Refer to Paragraph 5 6 of the TMBII TS03 Maintenance Manual corrective maintenance if any failures occur Run the diagnostics as described in Paragraph 5 6 1 If the TMB11 TSO3 system operates normally and the diagnostics show satisfactory results then the system has been properly installed and system operation is up to specification 2 15 CHAPTER 3 SYSTEM OPERATING INSTRUCTIONS 3 1 CONTROL AND INDICATORS Figure 3 2 describes the controls and indicators 3 2 OPERATING PROCEDURES 3 2 1 Tape Threading To thread the tape on the transport proceed as follows 1 Raise the latch of the quick release hub and place the tape file reel to be used on the supply hub Figure 3 1 with the write enable ring side next to the transport deck 2 Hold the reel flush against the hub flange and secure it by pressing the hub latch down 3 Thread the tape along the path as shown in the threading diagram Figure 3 1 4 Holding the end of the tape with a finger wrap a few turns counterclockwise around the takeup hub TAKEUP HUB SUPPLY REEL Figure 3 1 Tape Threading Diagram 3 2 2 Power Up Press the POWER ON OFF
30. S GENERATOR Ck CRCS 6 FWD REV MOTION REWIND OFF LINE CONTROL SS CCU S SS CRC 5 DETECTOR 9 12 STATUS LOGIC SELR 5 ON LINE TUR XPRT RDY SDWN RWNDG WRL LOAD POINT WRLCK NOTE Lettering on connectors C and D are connecting points to other holf of this illustration They do noi represent connector pin lettering J5 dimid RDO RD RDP7 PREAMP 4 5 6 7 SENSOR ERASE 06 7 13 14 TIMING WRITE L SKEW STRB READ LOGIC TDI TD10 11 12 CONTROL PANEL e o LP RWD TD8 CONTROL MOTION CONTROL LOGIC CONTROL INTERFACE FWD REV RWD STATUS 9 TO TEST BOX 79 rpg FWD REV FFW FREV das 10 POWER SUPPLY DTL TTL LOGIC OP AMPS 110 220 230 DC MOTORS X M8920 cutput jacks J2 J4 and J6 connect to J2 J3 and J1 respectively on the second tape drive if used M a Q 20 A SA iF mb eia A A k NEI TIT TIO NN Mo T N a lt Figure 1 5 TMB11 TS03 Functional Block Diagram Sheet 2 of 2 1 9 t CREER a Ml The command register selects which transport is to be involved in the transfer via the SEL 0 SEL 2 lines supplies the function command to the command decoder which generates the required com mands
31. Use wood blocks and planks to form a ramp from the skid to the floor and carefully roll the cabinet onto the floor Roll the system to the proper location for installation 2 2 2 Device Unpacking Instructions Before unpacking the equipment check the shipping list to ensure that the correct number of packages has been received Check the shipping list for the correct TMB11 module types Carefully remove each device from its shipping carton Note that the side mounts are already attached to the TSO3 trans port s and the mounting hardware is packed in a bag in each shipping carton 2 3 INSPECTION After removing the equipment from its container s inspect it and report any damage to the respon sible shipper and the local DIGITAL Sales Office Inspect as follows l Za 5 6 Inspect all switches indicators and panels for damage Remove equipment covers where necessary and inspect for loose or broken modules blower or fan damage and loose nuts bolts screws etc Inspect wiring side of logic panels for bent pins broken wires loose external components and foreign material Check TS03 transport s for any foreign material that may have lodged in the tension arm reel hubs and other moving parts Check TS03 power supply for proper seating of fuses and power connectors Inspect each TMB11 module for shipping damage 2 4 CABINET INSTALLATION SYSTEM ALREADY INSTALLED If the equipment is already mounted in the cabinet Proc
32. Using a swab and cleaning fluid clean the recording head and tape guides on both drives Pass a lint free wipe over the head and guides and gently dust the sensor and bulb and lens on both drives Close the lower door and restore the drive to service C 2 4 Cleaning the TUS6 DECtape Drive L 2 Dismount all tapes Using a lint free wipe give the front of the unit a general cleaning to remove all lint dust and loose oxide that may have accumulated Moisten one of the swabs and scrub away the oxide that has built up on the edges of the guiding paths A pointed wooden dowel that has been soaked in cleaning solvent is often very helpful to remove very old hard deposits which have become lodged in these areas Wet a lint free wipe with the solvent and scrub the tape guiding path and the top of the tape head Follow this treatment with a dry lint free wipe to pick up any residual solvent C 2 5 Cleaning other DIGITAL Tape Units Cleaning instructions for tape units not mentioned here can be found in the maintenance manuals for those units Reader s Comments TMB11 TS03 DECmagtape System User s Manual TMB1 1 M System 11 001 Your comments and suggestions will help us in our continuous effort to improve the quality usefulness of our publications What is your general reaction to this manual In your judgment is it complete accurate well organized well written etc ls it easy to use What features
33. aint or logo is required please specify Head is supplied on mounting plate and with face shield and connector Specify number of tracks All heads are read after write with side mounted erase Deskew chart is furnished with each head Capstan motor tachometer assembly is supplied with capstan wheel in case of damage to capstan in removal Table B 5 Replaceable Spare Parts for Figure B 2 198 4474 601 2 Transformer Assembly 3 198 3625 199 Capacitor Electrolytic 18 000 mF 25 V min 4 198 3610 449 Capacitor Electrolytic 39 000 mF 10 V min 6 198 0108 001 Rectifier MR751 Motorola package of 6 7 198 4306 xxx Servo Preamplifier Module 1 8 198 3844 001 Sensor Amplifier Driver Module 9 198 3194 xxx Ramp Generator Module 1 10 198 3843 001 Pushbutton Control Module 11 198 3842 001 Control Interface Module 13 198 4845 xxx Delay Timing Module 9 track special 1 2 14 198 4179 xxx Read Amplifier Clipping Level Module 1 15 198 4178 Quad Read Amplifier Module 1 17 198 3848 001 Four Channel Write Amplifier Module 18 198 3849 001 Five Channel Write Amplifier Module NOTES l Assembly varies with speed of machine Please specify when ordering 2 Delay timing module version varies with machine specifications Consult card identification strip or schematic section for module type required Table B 6 Replaceable Spare Parts for Figure B 3 Part No 198 4441 001 Voltage Regulator Servo Pow
34. and TU10 DECmagtape Drives 2 Cleaning the TS03 DECmagtape Drive 4 Cleaning the TU60 Drive 5 Cleaning the TUS6 DECtape Drive C 5 Cleaning other DIGITAL Units C 5 Figure No 1 1 1 2 1 3 1 4 1 5 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 3 1 3 2 4 1 A 1 A 2 A 3 4 5 6 B 1 B 2 B 3 C 1 C 2 C 3 ILLUSTRATIONS Title Page 1 7503 System Configuration iw eck te ee ri a 1 1 TMBLEILCOBUOIHBE s a det a HD c se iio 1 3 TSUS Tape Transport u yy uy Sua A a a OES 1 4 TSO3 M Master Tape Transport with M8920 Adapter Module gu awe 1 5 11 503 Functional Block Diagram o tie T 1 8 Space and Service Clearance Top View 2 2 Cabinet Installation ee Bags E Ge rn 2 4 TS03 Transport Physical Dimensions 2 5 Expander Box Backplane BA11F box shown 2 6 Power Cabling of TMB11 System Unit in BAIIF 2 7 TMB11 Module Location and Cabling in BAIIK Box 2 9 TMB11 Module Location and Cabling in BA11F Box 2 10 Unibus Cabling ite eek 2 11 TMB11 Mounted in System Unit 2 11 MS5920 Cabling ah me ones EA AAA we ee t 2 12 I O Cable Connection Diagram
35. ape Marker A reflective strip placed on the nonoxide side of the tape against the nonreference edge 25 to 30 ft 762 to 914 cm from the trailing edge of the tape 4 9 Channel Recording Eight tracks of data plus one track of vertical parity Figure A 2 shows the relationship between track and bit weight for a 9 channel transport When the track vs bit channel standard was adopted the outer tracks were more susceptible to bit dropping errors Consequently channels containing the least 1s were assigned the outer locations on the tape A 1 REFERENCE BIT WT TRACK EDGE 22 1 p Se o eeu y 24 3 P 4 p 25 5 p 26 6 27 7 E Jamie 2 Lad D seu READ HEAD 11 3091 Figure 2 Track Bit Weight Relationship for 9 Channel Transport 5 Tape Character A bit recorded in each of the nine channels 6 Record A series of consecutive tape characters 7 File An undefined number of records minimum zero no maximum 8 Interrecord Gap IRG A length of erased tape used to separate records 0 5 in 1 27 cm minimum for 9 track maximum IRG is 25 ft 762 cm 9 Extended IRG A length of erased tape 3 in 7 62 cm minimum optionally used to separate records It must be used between BOT and the first record 10 Tape Speed The speed at which tape moves past the read write heads
36. ape reels inside containers when not in use keep the empty containers tightly closed to keep out dust and dirt 3 Never touch the portion of tape between the BOT and EOT markers oil from fingers attracts dust and dirt 4 Never use a contaminated reel of tape this will spread dirt to clean tape reels and could have an adverse affect on tape transport reliability 5 Always handle tape reels by the hub hole squeezing the reel flanges could lead to tape edge damage in winding or unwinding tapes 6 Donot smoke near the tape transport or storage area tobacco smoke and ash are especially damaging to tapes 7 Donot place magnetic tape near any line printer or other device that produces paper dust 8 Do not place magnetic tape on top of the tape transport or in any other location where it might be affected by hot air 4 3 CUSTOMER PREVENTIVE MAINTENANCE OF TS03 TAPE TRANSPORT 4 3 1 General Digital Equipment Corporation tape transports are highly reliable precision instruments that will provide years of trouble free performance when properly maintained A planned program of routine inspection and maintenance is essential for optimum performance and reliability The following infor mation will assist the customer in caring for his equipment and ensure the highest level of performance and reliability 4 3 2 Preventive Maintenance To ensure trouble free operation a preventive maintenance schedule should be kept Preventive maintenance
37. ces Presents functions and specifications of the M series logic modules accessories and connectors used in the TMB11 Controller and the TS03 DECmagtape Transport Includes other types of logic produced by DEC but not used with PDP 11 devices Provides a detailed discussion of the PDP 11 software system used to load dump edit assemble and debug PDP 11 programs input output programming and the floating point and math package 1 5 SPECIFICATIONS Main Specifications Storage medium Capacity tape reel Data transfer speed Drives control maximum Data Organization Number of tracks Recording density Interrecord gap Recording method Tape Motion Read write speed Rewind speed Tape drive Reel braking Speed variation Start stop distance Start stop time Tape Characteristics Length Type Thickness Tension Reel diameter Reel hub Mechanical Tape drive mounting Tape drive size Tape drive weight Control unit PDP 11 Power Input current TMB11 Input current M 8920 Input current TSO3 Frequency Input power 1 2 in 1 27 cm wide magnetic tape industry compatible 5 million characters 10 000 char sec 2 9 800 bpi 0 5 in 1 27 cm minimum NRZI 12 1 2 in sec 75 in sec rewind time 2 min maximum Single capstan Dynamic servo control 3 instantaneous 1 long term 0 19 in 0 48 cm 30 ms 600 ft 182 9 m Mylar base iron oxide coated 1 5 mils 0 038 mm
38. cter3 Character 4 Character 5 0 0 1 0 0 1 0 0 l 0 0 1 1 0 l l 0 l 1 0 0 0 1 1 1 1 0 0 1 2 3 4 5 6 7 Qo m pi w C VO 0 00 Table A 2 CRC Character in Register When Writing CRC Register Character 0 0 0 0 1 1 0 0 0 0 1 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 1 1 0 0 1 0 0 0 1 0 1 0 0 0 1 1 0 0 0 1 1 0 1 0 0 1 1 1 0 1 0 1 0 0 1 0 1 4 Steps 3 are repeated for each data character of record 5 AtCRC time all positions of the CRC register except CRC2 CRC4 are complemented and the resultant CRC character is written on tape 6 The CRC register is cleared for the next record A 7 A 4 LONGITUDINAL REDUNDANCY CHECK LRC CHARACTER The LRC character is written three spaces after the CRC character The vertical s bit is always written on the LRC character the vertical parity of LRC is never checked The LRC character makes the longitudinal parity even for the entire record including the CRC The LRC is generated by the LRC register in the following manner l The LRC register is cleared at the beginning of a record 2 Ascharacters are written on tape corresponding bits complement the LRC register at the time data Is written on tape 3 At LRC time the LRC strobe clears the write buffer and Is are written on tape in only those channels for which the write buffer is set prior to clearing 4 Following this method the LRC charact
39. easing agents available It will not adversely affect any part of DIGITAL s tape equipment To ready the can of fluid for service unscrew the top and punch a small hole in the metal seal covering the pour spout WARNING TF113 is a non restricted non hazardous substance However when using TF113 avoid excessive skin contact do not allow TF113 to come in contact with the eyes and do not swallow it Use TF113 only in a well ventilated area When cleaning tape equipment never dip a contaminated cleaning swab or wipe into the can To transfer fluid onto the swab pour a little out into the screw cap and dip the swab into the cap Discard the remaining fluid when the cleaning operation is complete Always keep the can of fluid tightly closed when not in use because FREON TF113 evaporates rapidly when exposed to air Use only the cleaning materials contained in this kit to clean tape heads guides reels in general any part of the drive where a dirty residue could ultimately come in contact with tape To clean other parts of the drive such as the exterior surfaces of doors or the friction pads of brakes use any reasonably clean lint free material with or without cleaning fluid NOTE Should you encounter an unusually stubborn dirt deposit that appears to resist TF113 try a mild soap and water solution to dislodge it After using soap be sure to wash down the affected area thoroughly with TF113 to remove soapy residues C 2 THE CAR
40. ecords Figure A 3 Each record contains a specified number of characters determined by the word count The minimum record length is 3 characters the minimum word count is the 2 s complement of 3 77758 j FE o GA BEGINING END OF OF TAPE TAPE GAP GAP GAP FILE 23 IRG IRG IRG FILE MARK 23 g Fe AP 8 0 6 DATA PREVIOUS le IRG h DATA NEXT i RECORD i RECORD l h 0 6 1 1 I I I t I I Feel HIT bx un CRCC FILE MARK CRCC i ERCC LRCC LAST DATA LRCC FIRST DATA CHARACTER CHARACTER FIRST DATA CORP OF NEXT LAST DATA RECOR RECORD CHARACTER CHARACTER OF PREVIOUS OF NEXT FILE FILE IRG FORMAT FILE MARK AND GAP FORMAT 3 CHAR SPACE xx 7 CHAR SPACE 11 3069 Figure A 3 Data Recording Scheme Records are separated by interrecord gaps IRGs The IRG is 0 5 in 1 27 cm minimum approx imately 0 6 in 1 5 cm in normal operation but may be extended to 3 in 7 62 cm by performing an extended gap operation Tape IRGs unrecorded areas provide areas on the tape for the transport to start or stop and also separate data records 2 1 NRZI Recording Method non return to zero change one In the NRZI recording method a 1 bit is represented by a reversal in the direction of tape magnet ization on a track a O bit is represented by no change in tape magnetization A 2 2 9 Channel Tape Format The for
41. ed in a DEC or customer supplied cabinet the number of transports in the system and other variable factors Instructions are given for both cabinet and separate device configurations 2 2 1 Cabinet Unpacking Instructions To unpack the cabinet proceed as follows 1 Remove outer shipping container NOTE The container may be either heavy corrugated card board or plywood In either case remove all metal straps first then remove any fasteners and cleats securing the container to the skid If applicable remove wood framing and supports from around the cabinet perimeter 2 1 SWINGING DOOR RH NOTE 1 SWINGING DOOR LH NOTF 18 46 35cm REMOVABLE END PANEL REMOVABLE END PANEL m 48 Tiza 122 47cm CABLE ACCESS caia CASTER SWIVEL RADIUS 2 13 45 54 87 cm 4 CASTERS 19 TSO3 EXTENDED 48 26 FROM CABINET 1 Door be L H Allow space for either case E a a J 22 CABINET 7176 182 28cm high A floor line to cabinet top 11 3092 Figure 2 1 Space and Service Clearance Top View 2 2 6 Remove the polyethylene cover from the cabinet Unbolt cabinet s from the shipping skid The bolts are located on the lower supporting side rails and are exposed by opening the access door s Remove the bolts Raise the leveling feet above the level of the roll around casters
42. ed to slide the equipment out of the rack for servicing and to open the front door on the TS03 DECmagtape Transport The TS03 and TMB11 may be housed in separate cabinets If this is the case and the cabinets are separated by long distances consideration should be given to overhead trenching ducts for the cabling 2 1 2 Power Requirements The TMB11 TS03 DECmagtape System can be operated from a nominal 115 or 230 Vac 50 60 Hz power source Line voltage should be maintained to within 10 percent of the nominal value and the frequency should not vary more than 3 Hz 2 1 3 Environmental Requirements The operating environment should have cool well filtered humidified air a temperature range of 15 to 27 and relative humidity of 40 to 60 percent 2 2 UNPACKING The 11 503 may be shipped two different configurations with the system installed in equipment rack or with each device packaged separately Unpacking and installation procedures vary greatly depending on the system configuration For example if the user has ordered a complete PDP 11 system the TMB11 TSO3 DECmagtape System is shipped installed in its appropriate rack with the interconnecting cables installed However if only a part of the system is shipped because the user already has a basic PDP 11 system then the TMB11 TS03 DECmagtape System is shipped separately with the appropriate cables Installation procedures may vary depending on whether the unit is mount
43. eed as follows 1 Lower the leveling feet so that the cabinet is resting on the floor not on the roll around casters Use a spirit level to level the cabinet ensure that all leveling feet are firmly on the floor Remove the shipping screws that secure the equipment to the cabinet Plug the 861 power control ac power cord into a receptacle having the correct power voltage and frequency 2 3 2 5 INSTALLATION OF SYSTEM COMPONENTS The system components should be mounted in a 19 in by 20 in 48 3 cm by 50 8 cm equipment bay Figure 2 2 shows a recommended cabinet layout The equipment should be mounted from the top down Ensure that power is removed from the PDP 11 and the TS03 s If the TMB11 and the TSO3 are installed in more than one cabinet ensure that the cabinets are tied to the same ground or install a ground wire between the cabinets MOUNT GUIDES IN 7593 19th Lone N THE TOP SLAVE u OF CABIN MOUNT rn IN T593 34th HO MASTER NOTE 1 d E NOTE 2 PDP 11 MOUNT IN 69th HOLE NOTES 1 Expander box or other option 2 Contains six cards of TMB11 3 The TMB11 may be installed in a separate expander box un CONTROL 11 3996 Figure 2 2 Cabinet Installation 2 5 1 TS03 Mounting Instructions To mount the TS03 Figure 2 3 proceed as follows NOTE If two TS03 transports master and slave are to be installed the slave the unit without the M8920 Adapter Module is installed at the upp
44. er Assembly 4 198 0802 001 Fuse Holder 198 0133 030 Fuse 3AG 3 A 115 V box of 5 198 0133 015 Fuse 3AG 1 5 A 230 V box of 5 198 5001 103 Switch 115 220 V 6 198 0068 001 Power Cord 198 0100 001 198 0102 001 198 0103 001 Hub Repair Kit Brush Replacement Kit Reel Motor 4 brushes Brush Replacement Kit Capstan Motor 2 brushes 1 Heat sink assembly includes regulation module 190 4352 001 This module is not readily replaceable without replacing heat sink 2 Repair kit contains those items subject to wear B 7 Vendor Number 154 0035 001 190 1509 001 190 2399 010 190 2641 001 190 2747 001 190 3631 005 190 3645 002 190 3841 001 190 3842 001 190 3843 001 190 3844 001 190 3848 001 190 3849 001 190 3860 001 190 4178 004 190 4179 004 190 4220 001 190 4306 001 190 4352 001 190 4845 001 192 9900 001 190 4448 001 190 4441 001 190 3468 001 190 2647 002 190 2484 001 128 0091 001 125 0030 006 190 4218 001 190 4438 001 151 0057 001 190 1139 001 190 1138 001 151 0038 001 125 0006 001 125 001 5 001 125 0008 103 125 0040 001 154 0001 001 DEC Number 29 21904 29 21905 29 21906 29 21907 29 21908 29 21909 29 21910 29 22269 29 21911 29 21912 29 21913 29 21914 29 21915 29 22268 29 21916 29 21917 29 21918 29 21919 29 21920 29 21921 29 21922 29 21923 29 21924 29 21925 29 21926 29 21927 29 21928 29 21929 29 21930 29 21931 29 21932 29 21933 29 21934
45. er forces an even number of bits to be recorded on each track of the tape The CRC character 15 included in determining the LRC character A 5 DATA FILES As previously stated a record is a group of characters preceded by an IRG and terminated by three spaces a CRC character three more spaces and an LRC character A file is a group of records separated by IRGs and terminated by a 3 in 7 62 cm gap followed by a file mark The file mark is a record consisting of a single data character the end of file EOF character followed by seven blank characters and an LRC character The CRC character is not written on an EOF record The LRC character with a file mark is a duplicate of the EOF character 233 A 6 TRACK ASSIGNMENTS The track assignments for read write and parity bits are shown in Table 3 Table A 3 Track Assignments for Data and Parity Read Data Bits Write Data Bits Transport Binary Track Number 1 furthest from WD5 transport 2 WD7 29 3 WD3 24 4 WDP 5 WD2 25 6 WDI 26 7 WDO 2 8 WD6 2 9 closest to WD4 2 transport A 8 APPENDIX B TMB11 TS03 SYSTEM PARTS LIST 1 TS03 PARTS Figures B 1 through B 3 and Tables B 1 through B 3 show the location and identifying parts com prising the 503 DECmagtape Transport Tables B 4 B 5 and B 6 list replaceable spare parts Table B 7 relates the TS03 DEC part numbers to the vendor part numbers NOTE See the enginee
46. er inspect and clean the following Figure 4 1 then remove any residue with a clean dry swab Head and head shield Tape cleaner Load point end of tape sensor Tape tension roller not shown Missing tape sensor Capstan not shown Both tape guides 1 Using a lint free cloth or wipe dust the inside and outside of the plexig lass door If dirt and dust have accumulated a mild soap and water solution or antistatic cleaner may be used Ensure that the door is dry before returning the tape transport to service 2 Using a lint free cloth or wipe moistened with alcohol at least 91 remove all built up material on the reel hub surfaces especially around the O ring Remove any residue with a clean dry wipe Dust and vacuum the exterior of the outer door and top of the cabinet MISSING TAPE SENSOR HEAD COVER REMOVED FOR CLARITY 11 3061 Figure 4 1 Opening Head Shield 4 3 APPENDIX A MAGNETIC TAPE FUNDAMENTALS A l MAGNETIC TAPE FUNDAMENTALS DEFINITIONS 1 Reference Edge The edge of the tape as defined by Figure A 1 For tape loaded on a tape transport the reference edge is toward the observer REFERENCE EDGE TAPE LEADER OXIDE SURFACE SUPPLY REEL 10 1265 Figure A 1 Reference Edge of Tape 2 BOT Beginning of Tape Marker A reflective strip placed on the nonoxide side of the tape against the reference edge 15 ft 1 ft 457 cm 30 5 cm from the beginning of the tape 3 EOT End of T
47. ermost position l Remove the outer portions of the guides from the TS03 chassis by actuating the slide releases and mounting the guides to the cabinet in the 19th hole from the top of the cabinet using the eight screws provided Ensure that the guides are level and parallel to each other 2 Lift the TSO3 up and slide it carefully into the guides until the slide releases lock 3 Carefully lift the slide releases and push the transport fully into the cabinet 4 Ifa second TSO3 transport is to be installed repeat steps 1 through 3 above but mount the guides in the 34th hole 2 4 1 00 43 38 2 54 Br rn kirku kuta X ES RRE A A TE TER A e HE sip py Mer eu de d N ne NOTE DIMENSIONS FIRST SHONA ARE IN INCHES MOUNT ING DIMENSIONS IM PARENTHESES ARE IN CENTIMETERS SURFACE CONTROL PANEL RETAINING d _ Ta Na MOUNTING HOLES ARE FOR N ACCESS u Be ZERO NONTILT TYPE SLIDE TO RACK MOUNTING SCREWS NO C3CC 14 MOT SUPPLIED DUST COVER OPERS WITH UNIT DIMENSIONS MOUNTING TO APPROXIMATELY TYPICAL ON BOTH SIDES SURFACE 110 DEGREES SEE DETAIL 25 63 1 4 5 75 I 14 6 45 1 14 DETAIL TYPICAL SLOT PATTERN 1 48 3 75 19 00 48 26 11 3046 Figure 2 3 TS03 Transport Physical Dimensions 2 5 2 Installation Cabling 2 5 2 1 System Unit
48. g operating supplies including disk cartridges disk packs and filters magnetic tape DECtape paper tape cassettes printer paper printer ribbons plotter paper etc Supplying accessories including disk storage racks DECtape storage racks carrying cases for disk cartridges and DECtape cabinetry tables and chairs NOTE Users of Digital Equipment Corporation equipment may obtain the proper operating supplies and acces sories by contacting Digital Equipment Corporation DEC Supplies Order Processing 146 Main Street Maynard Massachusetts 01754 Phone 617 897 5111 Ext 5218 5907 Boston Area 617 890 0330 TWX 710 347 0212 Cable Digital Mayn Telex 94 8457 Maintaining the required logs and report files consistently and accurately Making the necessary documentation available in a location convenient to the system Keeping the exterior of the system and the surrounding area clean Turning off the teletypewriter and or line printer when these devices are not in use Ensuring that ac plugs are securely plugged in each time equipment is used Performing the specific equipment care operations described in Paragraphs 4 2 and 4 3 at the suggested frequencies or more often if usage and environment warrant 4 2 CARE OF MAGNETIC TAPE 1 Donot expose magnetic tape to excessive heat or dust Most tape read errors are caused by dust or dirt on the read head it is imperative that the tape be kept clean 2 Always store t
49. hannel tape Figure A 5 consists of six character bits B A 8 4 2 1 in descending order of significance The parity bit or check bit is the seventh bit and is set or cleared by the transport write head One byte of a data word corresponds to one tape character However because one byte contains eight bits and a tape character contains only six data bits two bits within each byte are not used During a read operation the extra bits are forced to 0 during a write oper ation the bits remain unchanged During the core dump mode of operation one byte corresponds to two tape characters Thus all bits within the byte are used however the two most significant bits on the tape are not used FORWARD TAPE MOTION iid CHANNELS LRC CHARACTER ONE BYTE DURING CORE DUMP MODE PARITY DATA 3 INTERRECORD BOT GAP 3 CHARACTER CHARACTER GAP RECORD i MIN PERIODS IRG 0 7 CHANNEL DATA FORMAT EOF MARK CHARACTER o DATA SS NEUE EXTENDED IRG RECORD IN BLOCK DATA BLOCK 3 BLANK e EOF RECORD CHARACTER 11 0391 Figure A 5 7 Channel Tape Format The magnetic tape is divided into data records each record separated by an interrecord gap IRG A record for 7 channel tape may be any length from a minimum of 24 characters to a maximum of 4008 characters In a block format a number of records are written together with an IRG before the first record and after the last record In either case the IRG is an unused
50. ined in the master transport Figure 1 1 is an illustration of the TMBI1 TSO3 system configuration WRITE STROBE TSO3 SA SB OPTIONAL TSO3 MA MB INCLUDES M8920 READ DATA DECMAGTAPE READ DATA MASTER SLAVE CONTROLLER DECMAGTAPE DECMAGTAPE TMB11 TRANSPORT READ STROBE TRANSPORT ADAPTER AC DC AC 11 3990 Figure 1 1 11 503 System Configuration The TMB11 MA is a 115 Vac 60 Hz system The 1 is a 230 Vac 50 Hz system The 11 system is commonly referred to by its component subunits the TMB11 and the TSO3 hence the manual title TMB11 TS03 DECmagtape System User s Manual Within this manual the system is referred to as the TMB11 TSO3 1 1 The TMB11 Controller interfaces the DECmagtape system to the PDP 11 Unibus It controls data transfers issues control commands to the TS03 master and monitors system operation Each TM B11 can control two 03 transports a master and a slave The TS03 M transport consists of an M8920 Adapter Module and a transport The M8920 processes commands from the controller and issues motion and read write commands to the master and slave transports the M8920 also monitors status lines from the master and slave transports Any status changes at the selected transport are reported immediately to the controller In response to inputs from the adapter the tape transport controls tape motion and records and reads data on magnetic tape Two models of the master D
51. l control it can be unloaded by pressing the REWIND pushbutton to rewind the tape past the load point to the physical beginning of the tape NOTE The rewind sequence cannot be stopped until the tape has rewound either to the load point or until tension is lost at the physical beginning of the tape 3 2 6 Power Shutdown Press the POWER ON OFF switch to OFF to remove ac power from the transport A tape transport should not be turned off when tape is loaded and is past the load point marker The 503 transport is designed to prevent physical damage to the tape in the event of power failure and to minimize oper ator error that could destroy recorded data In the event of power failure during tape unit operation manually wind the tape forward several feet before restoring power When power has been restored press the LOAD pushbutton then the REWIND pushbutton This will rewind the tape to the load point If desired the tape can then be advanced to the data block nearest the point at which the power failure occurred by initiating the appropriate control commands CAUTION In dual drive systems when one drive is on line and running do not turn power off at the unused drive i e do not set the TS03 POWER ON OFF switch to OFF To do so may result in data errors on the drive that is running 3 3 CHAPTER 4 CUSTOMER CARE AND PREVENTIVE MAINTENANCE 4 1 CUSTOMER RESPONSIBILITIES The customer is directly responsible for l Obtainin
52. mat Figure A 4 is composed of from 18 to 2048 nine bit characters spaced 1 800 in 3 mm apart followed by 3 character spaces a CRC character 3 more spaces and an LRC character This unit of data is called a record At 800 characters per inch the record is between 1 32 in 79 mm minimum and 5 in 12 7 cm maximum Between each record is a gap of at least 1 2 in The tape structure consists of a number of records followed by a file mark Figure A 3 Since data is recorded and read at high speed IRGs are used to provide space for starting and stopping a tape transport transport accelerates from standstill to full speed in approximately 0 2 in 0 5 cm of tape and deceler ates from full speed to standstill in 0 2 in 0 5 cm of tape thus the minimum of 0 5 in 1 27 cm provides adequate space for starting and stopping the tape transport LRC 0 005 10 NOTE 3 CRC 0 005 10 800 CPI 0 00125 3 INTERBLOCK GAP REFERENCE EDGE 0 50 MIN PES 0 043 MIN FRONT FLANGE NOTE 2 OF REEL 2048 MAX USASCII CH 18 MIN USASCII CH LOAD POINT HH EE TAPE REFLECTIVE MARKER_ lt STRIP ON NONOXIDE SHINY SIDE OF TAPE PARITY ODD BEGINING HHHH HH OF TAPE HHH END POINT END OF TAPE INIT AL GAP REFLECTIVE STRIP NONOXIDE NOTE 2 SHINY S TAPE TAPE MOTION 8E 0500 LEGEND NOTES BPI Tape Bits per Inch 1 Tape is shown with oxide side up read write head on sa
53. me side as BOT Beginning of Tape oxide Tape is shown representing 1 bits in all NRZI recording 1 LRC Longitudina Redundancy Check bit produced by reversal of flux polarity tape fully saturated in CRC Cyclic Redundancy Check each direction 2 Tape to be fully saturated in the erased direction in the interrecord gap and the initial gap 3 An LRC bit is written in any track if the longitudinal count in that track is odd Character parity is ignored in the LRC character 4 CRC Parity of CRC character is odd if an even number of data characters are written and even if an odd number of characters are written Figure A 4 Tape Recording Format USASCII program standards not a hardware limit 10 5 in 1 27 cm minimum O 6 in 1 5 cm nominal A 4 The CRC character is generated during a write operation and written at the end of a record The check character performs the same function to a record as the parity bit does to a character The LRC character is the final character in the record and is generated so that for each track the sum of 1 bits CRC character included is even The LRC character is written on tape by clearing the write buffer in the tape transport after the CRC character is written The LRC strobe resets the write buffer causing a to be written on each track containing an odd number of 1s a 0 is written on each track containing an even number of 15 A 2 3 7 Channel Tape Format Each character frame in a 7 c
54. ort 2 Remove the head cover by pulling it gently toward you 3 Pop up the head shield by exerting a light to medium upward force on the left side of the shield Refer to Figure C 3 The shield opens up to about a 45 angle Do not force it past this point or serious damage may result LOAD POINT END OF TAPE SENSOR TAPE CLEANER MISSING TAPE SENSOR HEAD COVER REMOVED FOR CLARITY 11 3051 Figure C 3 TS03 Tape Head Assembly 4 Using a lint free cloth and cleaning fluid clean Head and head shield Load point and end of tape sensor Missing tape sensor Tape guides Tape cleaner Tape roller guides two not shown g Capstan not shown e p o tb If any oxide deposits have built up on the head or tape guides scrub them away using a swab and cleaning fluid Follow this scrubbing with another pass with the lint free wipe NOTE When cleaning roller guides be careful to keep the cleaning fluid on the tape bearing surface of the guides to prevent degreasing their bearings C 4 Next use a lint free wipe and cleaning fluid to remove all dust and dirt from the inside of the plexiglass door Finally push down the head shield until it pops into position replace the head cover and restore the drive to operation C 2 3 Cleaning the TU60 DECcassette Drive l 2 5 First remove the cassettes from the drives Pull open the lower door to expose the recording head tape guides and leader sensor
55. portion of tape preceding and following the record or the block The isngitudina redundancy check LRC character is written after the data and is separated from the data by three character spaces Each bit in the LRC is such that the total number of bits in any specific channel is even The end of a block of records is indicated by an end of file mark character The end of file EOF mark is separated from the data by an extended IRG The extended IRG is a 3 in strip of blank tape compared to the standard 3 4 in IRG for 7 channel tape and the 1 2 in IRG for 9 channel tape The EOF mark and associated LRC character are considered to be one complete record The 9 channel tape format Figure A 6 is similar to the 7 channel format however because each character consists of eight data bits and one parity bit a byte corresponds to a tape character There fore there is no need for a core dump mode because information can be transferred from the system to the tape on a one to one ratio A record for 9 channel tape may be any length from 18 characters to 2048 characters In addition the 9 channel format includes a cyclic redundancy check CRC charac ter Data is followed by three blank character periods the CRC character three more blank character periods and the LRC character The LRC character is followed by an IRG as before CRC CHARACTER ONE BYTE LRC CHARACTER N a e a PARITY 3 ns NEXT
56. ring drawing set for parts informa tion on the M8920 adapter module ese MERE KE 7856 8 M 0598 Figure B 1 Front Panel Parts Identification Item 0 1 CN Q WN NOTES Specify logo and paint color if different from standard Order repair kit 198 0100 001 as spare Table B 6 l 2 Table B 1 Illustrated Parts Breakdown for Figure B 1 151 0057 001 151 0038 001 190 4448 001 291 3922 391 4440 190 2744 001 198 0011 001 190 2772 001 291 1509 001 90 4554 001 X X X x lt X XX F E XA F 190 4013 001 191 0805 001 Description Control Panel Assembly Note 1 Pushbutton Switch Assembly Power Switch LED Display PC Board Assembly Switch Cover Note 1 Control Panel Note 1 Dust Cover Assembly Hub Quick Release Note 2 Hub Bearing Assembly Takeup Hub Capstan Wheel Tape Guide Assembly Head Cover Note 1 Head Assembly Photosensor Assembly Load Point EOT Photosensor Assembly Broken Tape Tape Cleaner Tension Roller Guide Assembly Tension Arm Bearing Assembly Magpot Tension Sensor Assembly Magpot Circuit Module Spring Tension Tension Arm Assembly Reel Motor Assembly Belt Supply Drive Belt Takeup Drive File Protect Switch Assembly Connector PC Board Assembly Pulley Reel Drive Capstan Motor Tachometer Assembly Read Preamplifier PC Board Assembly Indicates
57. segment of tape is erased before writing the first character This function is used for rewinding the tape on the feed reel so that the tape can either be unloaded from the transport or oper ation can start at the beginning of the tape When this function is used the tape moves in the reverse direction at a much higher speed 75 in sec than for other functions until the beginning of tape BOT marker is detected When the BOT marker 15 detected the tape slows down and comes to a complete stop at a point well beyond the BOT marker It then moves forward again until the BOT marker is again detected whereupon it comes to a final stop Rewind is used for tape positioning only and has no effect on information stored on the tape or in the memory Figure 1 5 is a functional block diagram of the TMB11 TS03 DECmagtape System The processor initiates a TMB11 T503 operation by addressing the TMB11 registers via the address decoder and loading the operation parameters into the registers The BUS CO C 1 bits specify an out transfer with respect to the processor causing SEL OUT to be asserted for the particular register addressed As each register is selected the processor places the appropriate data on the Unibus data lines which is then loaded into the register with the SEL OUT strobe Thus the command register receives the type of operation to be performed the byte record count register receives the number of bytes to be trans ferred and the c
58. tape unit is placed in an on line condition when the tape unit is on line it can be remotely selected and will be ready if tape is loaded to or past the load point When activated again it takes the unit off line The indicator is illuminated in the on line condition The load function must be performed before the unit will go on line LOAD Pushbutton Indicator The momentary pushbutton activates the reel servos tensions tape and starts the load sequence The indicator is illuminated when the reel servos are activated and tape is tensioned REWIND Pushbutton Indicator The momentary pushbut ton activates a rewind operation This control is enabled only when tape is tensioned and the unit is off line The indicator is illuminated during either a local or a remote rewind operation POWER Switch The ON OFF switch applies ac power to the tape transport Figure 3 2 Controls and Indicators to perform all normal operations under remote control 3 2 5 Tape Rewind and Unloading Provision is made in the TS03 transport for rewinding a tape to the load point under remote control However this operation may also be performed manually as follows l Ifthe ON LINE indicator is illuminated press the ON LINE pushbutton Check that the indicator extinguishes when pressure is removed 2 Press the REWIND pushbutton The tape will now rewind to the load point marker 3 After the tape has been positioned at the load point under remote or loca
59. tdown counter and enables the write strobe generator via the read write delay counter The write strobe generator produces REC pulses which record the data characters on tape via the write heads A parity bit is generated for each character and a CRC charac ter is generated for each record Each time a character is written on tape a WRS pulse is issued to the controller requesting the next character to be written The W RS pulse makes NPR request from the NPR logic and the cycle is repeated Note that in a write operation the GO BIT makes the first NPR request and the WRS strobes make the second and subsequent requests After the NPR logic issues DATA STB 2 it asserts NPR CLEAR BBSY which increments the byte record counter and the CMA register to prepare for the next transfer When the byte record counter senses that the desired number of bytes has been transferred read or written it asserts CARRY OUT 2 which negates WDR to the transport thereby inhibiting the write strobe generator and enabling the shutdown counter 1 10 The end of a data transfer is indicated by the LRCS character at the end of each record The LRCS strobe is applied to the done logic which then asserts DONE DELAYED to the bus interrupt logic The interrupt logic requests a bus interrupt to notify the processor that the command operation has been completed and the TMB11 TS03 i is ready for another command The 11 error logic monitors transport status including parity
60. urrent memory address register receives the memory address of the first byte to be transferred Parameters include four recording density choices that are sent to the transport as DEN 5 and DEN 8 bits The TS03 ignores these bits and operates at 800 bpi 9 channel only 1 7 HI DATA BYTE GATE eran UNIBUS REGISTER CMU m D00 DRIVERS D BIT 98 15 oc rors 8 0 BYTE 2 M7912 MUX Z BUS BRX Sl L STATUS IN OPERATION PARAMETERS Y a _ ee BUS BYTE RECORD COUNT __ INTERRUPT DONE DELAYED SELIIN qe ere ATUS BITS CI SEL gt CURRENT MEMORY ADDRESS BUS 002 008 SEL 3 IN 522 VECTOR ADDRESS SEL 4 IN 7 SEL SIN lt F m COMMAND FUNCTION COMMANDS READ WRITE ETC r m REGISTER I ES E cle ee 7 TET vum 2 M7911 Y ERR 1 Y Y DATA BUFFER CARRY OUT 2 MES Zx T DATA BFR IN BIT 0 7 RDS WRS GO BIT NPR CLEAR BBSY BUS NPR BUS NPG BUS BBSY BYTE RECORD COUNT REGISTER REG 2 w SSS 47 READ STATUS REGISTER M7911 SG SSG SS SS WE D 0 8 D15 lt SS BUS 18 SEL LO BYTE WRITE BYTE SELECT M7912 REGISTER REG 3 CMA BIT 00 We SEL 3 OUT SEL STATUS IN SEL 1 IN OUT L 11 7503 ADDRESS

TMB11/TS03 DECmagtape system user`s manual

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