ALF PenultiCopy Manual
Contents
1. PenultiCopy CONTENTS 1 INTRODUCTION 2 SETTING UP 3 COPYING 4 MAINTENANCE COPYRIGHT 1981 Software Forrest Thiessen Philip Tubb Research John Ridges A L F PRODUCTS INC Manual Philip Tubb 1448 ESTES Graphics Rick Harman DENVER CO 80215 Also starring Allen Foster MANUAL P N 11 1 4 PROGRAM WITH MANUAL P N 13 3 32 INTRODUCTION 1 1 Introduction ALF PenultiCopy PenultiCopy lets you copy standard 13 and 16 sector Apple compatible disks rapidly and accurately To use the program you need a 48K Apple II Apple is a trademark of Apple Computer Inc with either Integer or Applesoft BASIC although Integer BASIC is preferred a video monitor connected to the Apple or television set with modulator and one or more Apple disk drives with controller If you wish to make major disk drive adjustments you wil have to understand electronics and be fairly familiar with disk drive operation and have the following test equipment A two channel oscilloscope with differential mode and sweep times down to 1 microsecond per division such as the Tektronix T932A or T935A Shugart Associates SA4 Service Manual 54 96 The OEM Manual 54192 may also be useful Shugart Associates Alignment Diskette SA 124 Also required from Shugart Associates is a supply of replacement parts listed in the maintenance section Shugart Associates can be reached at 435 Oakmead Parkway Sunnyvale CA 94986 o2. This is done by copying the disks and then also verifying them If possible verify each disk in a different drive than the drive that wrote it This will assure you that at least one other drive can read it Note that reading a track just after it is written is Very easy compared to reading it with another drive If one drive has its track positioning off it will be able to read the track but another drive won t Doing a separate verify also checks for centering problems If a disk is copied off center due to a mispunched disk or due to a faulty or worn centering mechanism in the drive it can only be read when it is off center in an identical fashion Once it is removed from the drive it is unlikely it will ever be off center in the same way again SEEK ERRORS A special procedure is done during pass zero which helps detect a failing stepping motor in the head positioning mechanism Head positioning is called seeking and if any problem is detected the message SEEK ERROR will be displayed One or two seek errors could indicate simply a difficult to read disk Repeated seek errors on a drive may indicate failure of the stepping motor Note a seek error also occurs if the copy is removed too soon but not so soon as to cause an error on track 34 Another sign of failing stepping motors can be repeated home or recalibrate occurarices Home is a method of positioning the drive head to track PM when its current position is unknown and it
3. Apple s check words happened to work out anyway all copies in the set would be bad With dash mode on the same incorrect read would have to occur twice the same way to create a bad set In ALF s experience this option is not normally needed but it is available for the paranoid Note that dash should not be used with star as uninitialized sectors will be interpreted as differences CONTROL S and CONTROL T Pressing control S is used to select the 16 sector format when you have been copying 13 sector format Likewise pressing control T selects the 13 sector format Pressing control S turns off star mode if it is on and pressing or sets the program to 13 mode this is because star mode is not allowed in 16 sector mode Apple fixed the uninitialized sector problem in the 16 sector systems Note that you must have a P6A not a P6 version ROM in the P6 slot of each controller to copy the 16 sector format The P5 ROM doesn t matter CONTROL V and CONTROL C Finally pressing control V puts the program in verify mode and control C puts the program in copy mode Verify mode is the same as copy mode except that tracks are not written the master is read and then all slaves are read and compared with the data read from the master Note that a disk with uninitialized sectors placed in a slave drive will never verify as good The verify option is handy for quick checks on copying accuracy and for creating copies with extremely low reject rates
4. Frame Assembly Installation and Adjustment Apple format is soft sectored so ignore index timing adjustment used only on hard sectored formats 2 4 9 Index Detector Assembly Removal There is no index detector on Apple drives Same for 2 4 1 Index LED Removal and 2 4 11 Track Zero Switch Removal 2 4 12 Head Amplitude Check Use internal trigger sync rather than external since there is no equivalent to TP7 on the Apple drives adjust trigger level for best view Set all coupling to DC TP1 and TP2 are TP8 and TP9 on the Apple drive use TP2 and TP4 for grounds Add and invert one input is DIFF mode on the Tektronix T932A or T935A Set both channels to 2 volts division and time base to 5 microseconds division Writing an entire track with all one s is done by using the WRITE function of the DRIVE TESTER program press control W NOTE the SPEED and WRITE functions control S and control W erase whatever track the head is currently positioned at be sure to use a disk with no important data disk must be reinitialized before it can be reused 8 millivolts minimum amplitude does not apply to the Apple electronics correct number is unknown Expect a signal greater than 1 division at track 22 Shugart s 34 Track amplitude will be much larger 3 or more 2 4 13 Motor Speed Adjustment Do not use this procedure or 2 4 13 1 Use the SPEED command of the DRIVE TESTER program 2 4 14 Read Write Head Load Button Adjustment Connec
5. it will load the copy program from the disk As soon as the drive turns off you should remove the supplied disk and insert your initialized disk If you ve used MUFFIN to make a 16 sector disk you ll be running the programs off your 16 sector disk so you can just leave it inserted The program will display the currently selected slot drive numbers for the master and slave drives It also asks 19 TO STOP MASTER SLAVE NUMBER Input and press return to change the slot drive number of the master any digit from 1 to 9 to change the slot drive number of a slave or to add or remove a slave or 1 to go on If you typed the program will ask SLOT NUMBER Input the desired slot number for the master drive This is the drive the original disk to be copied must be placed in Slot numbers must be 1 7 The program next asks DRIVE NUMBER enter 1 or 2 to select drive 1 or 2 Illegal inputs cause the sequence to be ignored If you typed 1 9 for 19 TO STOP MASTER SLAVE NUMBER the program will ask TO REMOVE SLOT NUMBER Input to remove the drive or a 1 7 slot number to change the slot number or add a new slave drive The program continues as before with DRIVE NUMBER unless you are removing a drive Never enter a drive at more than one position or enter non existent drives When using only one drive enter it as the master and remove any slave drives shown Typing 19 to stop causes the program to continue with ERASE
6. results in the ALF PenultiCopy Copying 3 4 familiar buzzing noise heard when booting up The copy program does a home the first time it uses a drive after being run If a home occurs at any other time it is because a track number read from a disk did not match the track number expected Note that this could also indicate an off center disk because adjacent tracks can be read if a disk is sufficiently off center tracks are spaced only 1 48 apart MOVING COPY Never attempt to save the copy program after it has been run It will not work properly Either use the COPY MOVER program or when desperate BLOAD and BSAVE without running CLEANING DRIVES AT drives should be cleaned periodically The program CLEANER or A CLEANER for Applesoft is handy for turning the desired drive s motor on for about 39 seconds Load buttons must be periodically replaced although not so often and various drive parameters should be periodically checked Instructions for these procedures are in the maintenance section MAINTENANCE 4 1 Maintenance ALF PenultiCopy Basically drive maintenance is done as described in the Shugart Associates SA4 Service Manual 54996 Certain changes have to be made due to various components left out on the Apple version and due to differences between Shugart s electronics and Apple s electronics If you re doing a lot of maintenance the following replacement parts are very convenient REPLACEMENT PARTS
7. DOS Typing YES causes the copy program when run to erase Apple s DOS in memory providing more memory for the copy program to use and thus faster operation Exit from the program requires re booting when DOS has been erased If erasing DOS is not desirable type NO The program continues with DESTROY POWER SUPPLY Type NO Many people have had success with running two drives simultaneously with two control cards from an Apple with no other peripherals plugged in If you wish to do this type YES ALF will not be responsible for damage to your Apple power supply The program now asks INITIAL FORMAT 13 16 Type 13 if you will normally be copying 13 sector format disks or 16 if you will normally be copying 16 sector disks This will not prevent you from copying the format you do not select Next INITIALLY SET WITH is asked Type NO The star option will be ALF PenultiCopy Setting Up 2 2 explained later The program then asks INITIALLY SET WITH again type NO This option will also be explained later Now the program asks INITIALLY COPY OR VERIFY Normally you will answer COPY Answer VERIFY only if you wish the program to normally check disks rather than copy them The program will now write the modified copy program onto your disk You will also need the program DRIVE TESTER even if you are not planning on making drive adjustments yourself It is moved to your disk in a similar fashion using the program
8. Load Button 54145 This is a pressure pad which keeps the disk in contact with the recording head Since these wear out periodically it s good to have several on hand Collet Hub Hub Clamp 54 66 Hub Collar 54131 Clamp Spring 54132 E Ring 113 5 The hub clamp centers the disk and presses it tightly to the rotating spindle Eventually these wear out but also any old design clamps i e those that aren t brown with an off white center should be replaced Usually both the clamp 54 66 and the spring 54132 are replaced the other two parts are handy to have in case they are broken or fly off into oblivion CHECK OUT The cover is removed from an Apple drive by unscrewing the four bottom screws then sliding the cover off toward the back along the ribbon cable It doesn t seem to want to come off when pulled to the front It is best to remove and replace the cover only when the IN USE light is off Then the drive looks basically like the standard SA4 except for various missing components and a different circuit card in the case of the larger card When using a drive for the first time whether a new drive or an old drive you ll want to check the speed the load button the head positioning alignment the hub clamp the read signal amplitude and the R28 adjustment SPEED ADJUST and DRIVE TESTER Speed is checked as explained in the Setting Up section Usually speed is adjusted while at track PP although Shu
9. Note that if all sectors are unreadable or don t match on track AP a double beep will be done instead of an error message If during copy the master drive shows an error copying stops and all copies in slave drives are incomplete and thus must be re copied If during copy any slave drive gets an error including NO DISK pressing space will not start the next set This is to call the error to your attention Pressing a non space key such as RETURN will allow space to be used The key pressed is ignored except pressing G will work as it normally does If all slave drives get an error copying stops when the last drive gets an error It is important to remember that any slave drive with an error shown on the screen contains a bad disk which may or may not contain the desired information such a disk should be re copied Prior to re copying a disk it should be inspected for physical defects which may adversely affect the drive such as binding creases or glue spots DIGIT KEYS A variety of options are available when using the copy program First the slot and drive number of any master or slave drive may be changed and slave drives added or removed Begin by typing the slave number 1 9 or for the master A cursor will appear at the appropriate spot and you can type the slot number and then the drive number Slave drives can be removed by typing a slot number of Slave drive numbers need not be continuous e g one can have sl
10. TESTER MOVER or A TESTER MOVER Run the program As before when the first question appears remove the supplied disk and insert your initialized disk The program asks STANDARD CLOCK Answer YES unless you will be doing major drive adjustment and plan to have a clock modifier installed When you press return the program will write the modified DRIVE TESTER program on your disk To complete the move load CLEANER or A CLEANER and save it on your disk There is no CLEANER MOVER program since the CLEANER program is written in BASIC and needs no configuration DRIVE SPEED ADJUSTMENT The copy program is probably unlike any copy program you ve previously used Since it is designed for speed and accuracy it does not operate quite the same as for example Apple s copy programs The most obvious difference is probably that it doesn t check the speed of the drive and adjust the format to match This means that the speed of the drive must be set fairly accurately or the resultant copies will not be up to normal standards Thus it is very important that you check the speed of all drives you intend to use and adjust any that are too far off To do this insert your disk and type BRUN DRIVE TESTER At the bottom of the screen at the left side will be an S cursor D You should now press the number corresponding to the slot number of the drive to be tested The cursor will then move to after the D and you can press the drive number For example for s
11. always steps in this fashion never in reverse except back to track PP If life isn t complicated enough for you already press right arrow for track 11 and left arrow for track 19 This shows reverse positioning and is probably 4 3 Maintenance ALF PenultiCopy not significant during copying 2 4 2 Head Load Bail Adjustment There is no head load bail 2 4 21 Read Write Head Cleaning Procedure The 3M head cleaning diskette 47449 seems satisfactory Procedure is given in the Copying section A TIP Keep alignment diskette in a safe place free from vast temperature changes Never write on the alignment diskette Don t even try your write protect switch may be improperly adjusted DRIVE TESTER All commands in the DRIVE TESTER program turn on the drive motor Drive motor is turned off by pressing space All commands except SPEED do their thing and then go into continuous read mode READ is a no operation command that goes into continuous read mode Right and left arrows count as commands Press any digit 1 7 to change slot drive numbers CLOCK MODIFIER To check the R28 adjustment you must have a clock modifier installed available from ALF part number 1 1 3 This is done by unplugging IC B2 a 74586 on the motherboard near the keyboard and then plugging in the header socket 74S86 gadget supplied Be sure to get pin 1 aiming the right direction otherwise the 74S86 is destroyed fortunately one is supplied with the modifie
12. aves 1 2 and 4 active without needing to have a slave 3 STAR KEY One important option when copying 13 sector disks is the star option As initialized by DOS 3 2 or DOS 3 2 1 13 sector disks contain uninitialized sectors These are a major source of bad copies which are not detectable by normal check word checks Since it is impossible to tell the difference between an uninitialized sector and a read error while the master is being read uninitialized sectors present a major obstacle to accurate copying Therefore the ALF copy program is written so no copy contains uninitialized sectors all uninitialized sectors are initialized when they are read off the master Normally the copy program is configured with the star option off which prohibits the reading of uninitialized sectors This prevents read errors from being interpreted as uninitialized sectors instead To read a master with uninitialized sectors the star option must be on This is done by pressing or A star will appear in front of the message 13 SECTOR at the top of the screen Pressing or again turns off star mode Copy with star mode on only when 3 3 Copying ALF PenultiCopy necessary DASH KEY Another option is the dash option It is turned on and off by pressing When the dash option is on a will appear between MASTER and on the screen When dash is on the master will be verified after it is read If a sector was read incorrectly but
13. e speed be sure the IN USE light is off then remove the drive 2 3 Setting Up ALF PenultiCopy cover by removing the four screws on the bottom and sliding the cover off away from the face of the drive NOTE this procedure may void your Apple warranty Inside the drive there are two circuit cards a large one covering most of the top of the drive and mounted horizontally and a small one at the rear mounted vertically CAUTION do not attempt to adjust any of the adjustments on the large circuit card See the maintenance section for details There is one adjustment on the small card at the far right of the card It is slotted for turning with a small regular screwdriver Turning this adjustment will change the drive speed Watch the NOW column when turning the adjustment not the MIN and MAX columns After adjustment press RETURN or virtually any key except space to reset MIN MAX and VAR Try to adjust the speed so MIN and MAX read about the same but with MIN being negative and MAX being positive For proper operation they should be less than 5 If it isn t easy to get MIN above 5 and MAX below 59 the drive probably needs repair During a short period after pressing RETURN a VAR number greater than 20 is also suspicious Note that the longer the drive runs the more the speed drifts as it warms up Pressing space will turn off the drive motor and control S will resume the speed test After complete cooling drive speed should sta
14. gart recommends adjusting speed while the head is positioned at track 19 which they call 16 in decimal While running the DRIVE TESTER program the heads can be moved either by typing T for TRACK followed by a two digit hex track number PP 22 or by pressing the left and right arrow keys Note that the actual head position of a drive is unknown until a home function is done The DRIVE TESTER automatically does a home the first time a drive is used but if the head position is changed manually or a different drive is plugged in while the program is running a home function must be requested by typing H to have the program adjusted to the drive HUB CLAMP Load button replacement adjustment is covered in the Shugart manual as is head alignment and read signal amplitude The hub clamp is checked as follows If the hub clamp is not the latest version brown with a white center replace Also replace if visibly worn If pressure required to close door with typical disk inserted is abnormally small replace hub and spring Finally with scope set up for the read amplitude check go to track 22 and write a test pattern then open and close door If excessive wobbling is noted on the scope replace hub and spring Repeat test for track PP R28 adjustment is best left for last Meanwhile changes necessary to ALF PenultiCopy Maintenance 4 2 information in the Shugart manual are as follows CHANGES TO SHUGART MANUAL 2 4 7 1 Hub
15. il the next set is begun To stop the beeping press the G key the G key is also labeled BELL or press RESET to exit the program on some Apples you must hold down CTRL while pressing RESET DOUBLE BEEP If no disk is inserted in a slave drive the program will begin double beeping The double beep also occurs when a disk which cannot rotate is inserted or when a write protected disk is inserted If you wish to insert a disk or correct the problem do so and then press space The program will wait for the new disk to ALF PenultiCopy Copying 3 2 come up to speed before continuing If you wish to skip that drive press RETURN or any of various other non space keys BOOP and SCREEN MESSAGES During copying if the verify step shows a track to be bad the copy program will attempt to write that track several times If this does not solve the problem it will make a boop sound and display a cryptic error message next to the appropriate slave drive line in the display This message begins with the track number where the error occurred in hex 09 22 this is followed by a colon and a list of each sector C for 13 sector format or Q F for 16 sector format which could not be read or did not match Such a problem is usually due to a defective disk but is sometimes due to a dirty or misadjusted drive or in the case of 16 sector disks a magnetic pattern that is particularly difficult to read or any combination of the above
16. lot 6 drive 1 press 6 and then 1 The first letters of SPEED WRITE READ HOME and TRACK will light up indicating you can use these commands The safe commands READ HOME and TRACK are requested by typing their first letter R H or T but you will not need these commands at this time The commands which write on the disk SPEED and WRITE are requested by typing the control letter corresponding to their first letter control S or control W To test drive speed insert a disk that you don t mind having erased It doesn t have to be initialized Select a typical disk of the brand you will usually be using and make sure it isn t obviously damaged or difficult to turn Now hold down the control key while pressing S During the speed test the line at the bottom of the screen will be NOW MIN MAX VAR The number directly above the word NOW shows the most recently computed speed of the drive The number above that number shows the previous speed and so on Negative numbers indicate the drive speed is too slow positive numbers indicate the drive speed is too fast The numbers above MIN show the minimum speed number so far The numbers above MAX show the maximum speed number so far The numbers above VAR show the difference between MIN and MAX The object of speed adjustment is to get the MIN and MAX into an acceptable range preferably with MIN and MAX approximately the same except with MIN being negative and MAX being positive To adjust driv
17. r if your scope is so equipped may help visualization Pressing control W occasionally to write a new test pattern sometimes helps Note that any slime painted on the R28 adjustment must be loosened before attempting adjustment you may wish to reslime after any adjustments Since single turn potentiometers tend to be temperature sensitive it may be best to adjust in expected temperature Since R28 can be ALF PenultiCopy Maintenance 4 4 messy to adjust it is best left alone unless a problem is suspected MORE TIPS Remember that most difficulties are due to problems in reading disks In copying maladjusted read circuitry may present only annoyances due to rejecting of good disks but may not cause production of bad disks Thus most effort should be on parameters that affect write Mostly head positioning alignment load button quality adjustment motor speed head wear reflected in read amplitude centering hub adjustments and perhaps occasionally little things like carriage limiter adjustment head cable catching on things ribbon cable not fully plugged in and so forth 1531 N1934 OL 39Vd Nan AHvVO4 M31434 OLLSWIOHOS GIONVWNH GANIGWOO 431503 1 NITIV Ad SIA SV LS AL JONADITISALNI JILOV TIVO dalNI dAVWINVLS AHL AO NOILId3 H1112 LUTTE TRUM AMIE IA TITTEN 6b 9Z HO ZEP6692 NIHSIT8Nd 1OVHISSIL y3 10S
18. r so you have a spare This will make the timing used by the read and write circuitry on the controller card stable rather than extended occasionally Note that the color capability of the Apple is lost while the clock modifier is installed You may want to remove the clock modifier when it s not needed as it may be incompatible with some peripheral cards R28 ADJUSTMENT To check R28 adjustment connect the scope to TP7 using TP2 or TP4 as ground Set for 2 volts division and 2 microseconds division Remember to go to normal rather than DIFF mode Be sure you re seeing the far left side of the trace that horizontal position is not adjusted to show the end or middle of the trace you should probably always do this Use the WRITE command to write a test pattern Note that some pulses show two images this is due to a different positive going setting than negative going setting of R28 alternate pulses are due to positive going flux changes Optimum adjustment has only one image but probably cannot be obtained on all tracks with any given R28 setting Ignore large scale stretching shrinking due to normal disk wobble The R28 setting only affects read and doesn t seem to matter much on 13 sector disks but seems crucial on 16 sector disks Since most difficulty is found on the innermost tracks say 1F to 22 it is probably best to adjust this while at track 22 Note that adjusting the hold off delay between end of sweep and next trigge
19. r telephone 498 733 9199 SETTING UP 2 1 Setting Up ALF PenultiCopy PROGRAM CONFIGURATION First you must configure PenultiCopy for your particular system set up It is assumed that you know how to operate the Apple II computer and run programs using Integer or Applesoft BASIC It is best to keep the supplied disk as a backup rather than configure the program onto the supplied disk so obtain an initialized 13 sector disk to copy the program on to If you normally use 16 sector you can make an initialized 16 sector disk and use MUFFIN to copy the programs onto your 16 sector disk A copyright label matching the one supplied on the disk must be attached to your disk Federal law prohibits the copying of programs on the supplied disk other than for backup purposes A program called COPY MOVER is supplied which will move the binary COPY program onto your disk and also allow you to change the configuration When using Applesoft use the program A COPY MOVER rather than COPY MOVER During configuration you can specify the slot and drive numbers of your disk drives You need one drive as a master drive which the disk to be copied is placed in and 9 9 slave drives which disks to be copied on are placed in When no slave drives are used that is when there is only one drive available the master drive will also be used as a slave drive Begin by typing RUN COPY MOVER or from Applesoft RUN A COPY MOVER Once the program runs
20. rrors present in the P6 or the original P6A However it is apparently labeled only 341 9928 91 You will probably wish to use only this version of the P6A ROM aa COPYING 3 1 Copying ALF PenultiCopy The copy program uses one master drive and one to nine slave drives The disk to be copied is placed in the master drive and a blank disk is put in each slave drive The copy program then reproduces the data and format information on the disk in the master drive onto each disk in a slave drive When only one drive is available it is used alternately as a master and slave drive Unlike most previous copying programs the ALF copy program does not have to format the disk prior to copying data onto it The writing of both format information and data is done simultaneously in one step Also unlike most copying programs the ALF copying program then reads the format information and data from the copied disk and compares it with the format information and data from the master disk This helps to assure that the copy is correct and also serves to help find disks with physical defects To improve overall copying speed disks with physical defects are detected much more rapidly than on most copying programs The process of reading the slave disks and comparing them with the master is called verifying Although Apple s DOS has a verify command it does not work by comparing the desired data with the actual data it works by computing check
21. t scope as in 2 4 12 above 2 4 15 Track Zero Switch Adjustment There is no track Zero switch 2 4 16 Carriage Limiter Adjust so gap between sheet metal stop on head carriage and stepper cam is small when at track i e gap should be small in relation to the increase in gap size between track position and track l position 2 4 17 Index Sector Timing Adjustment There is no index detector 2 4 18 Head Radial Alignment head position alignment Shugart s alignment disk must be used but remember Shugart s track 16 will show as track 1 on the DRIVE TESTER program Set scope as for 2 4 12 except with time base set to 5 milliseconds division It may be necessary to increase scope intensity Study figures 11 and 12 head radial alignment as it may be very difficult to view on the scope Set eyes for maximum image retention Since there is no equivalent to TP7 on the Apple it will not be possible to know which lobe is the left lobe and which is the right At the suggested time base setting many lobes will be displayed Estimation of 7 may be difficult but this adjustment is crucial Rotating the stepper motor is very difficult and its position may change when the screws are tightened Test by setting for track 1 press H for home This shows fast access positioning Press left arrow for track F then right arrow for track 19 This shows normal positioning and is most crucial for copying the copy program
22. words and comparing the check words with the check words found in the disk information Experience shows that often incorrect sectors will show as good using only Apple s check SETS and PASSES When space is pressed to begin copying PenultiCopy copies in the following fashion First as many tracks of the original as will fit in memory are read Setting the copy program to erase the DOS in memory see the set up section may allow more tracks to be read Then this information is written one track at a time on the first slave drive After each track is written it is immediately read for the verify step Once all available tracks have been written and verified the copy program continues with the next slave drive This procedure of reading the master and writing verifying all slaves is called a pass Once the pass is completed another pass begins until all 35 tracks have been copied The complete operation of copying 35 tracks using several passes is called copying a set BIP and SPACE During each set the screen shows a pass number which counts down to zero When zero is displayed the last pass is being performed When pass zero begins a short bip emerges from the Apple speaker This warns you that copying is nearly finished Note that any keys pressed before the bip will be cleared BEEP and THE G KEY If you don t notice the bip the program will beep when copying is complete The program will continue to beep periodically unt
23. y within acceptable ranges for the first 39 seconds of operation To replace the cover after adjustment is complete be sure the IN USE light is off Then check the ribbon cable connector which plugs into the large circuit card It should be pressed all the way onto the mating pins Now just reverse the disassembly procedure slide the cover back on from the back sliding toward the face and replace the four screws When adjustment is finished press space to stop the test Note that a beep during testing means that the speed cannot be computed probably because there is no disk or it is write protected To exit the DRIVE TESTER program press RESET It is best if you have an auto start monitor ROM ROMS One final note concerning 13 and 16 sector formats is in order There are two ROMs on an Apple drive controller card One is labeled P5 and the other is labeled P6 in white paint on the circuit card The P5 ROM determines whether your system will boot from 13 or 16 sector disks the ROM labeled P5 is for 13 sector and the ROM labeled P5A is for 16 sector disks The P6 ROM is used to decode the data on the disk A ROM labeled P6 is only suitable for reading 13 sector disks and should not be used to read 16 sector disks A ROM labeled P6A will read both 13 and 16 sector disks For best results when using the speed test in the DRIVE TESTER program use a P6A ROM Lately a new P6A ROM has been released which does not have the read timing e
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