B&B Electronics DSC-100IND
Contents
1. Figure 5 Jumper connector locations Quatech DSC 100 User s Manual 4 Address Map and Special Registers This chapter explains how the two UARTs and special registers are addressed as well as the layout of those registers This material will be of interest to programmers writing driver software for the DSC 100 4 1 Base Address and Interrupt Level IRQ The base address and IRQ used by the DSC 100 are determined by the BIOS or operating system Each serial port uses 8 consecutive I O locations The two ports reside in a single block of I O space in eight byte increments along with a sixteen byte reserved region for a total of 32 contiguous bytes as shown in Figure 6 Port I O Address Range Serial 1 Base Address 0 to Base Address 7 Serial 2 Base Address 8 to Base Address 15 Figure 6 Port Address Map Both serial ports share the same IRQ The DSC 100 signals a hardware interrupt when either port requires service The interrupt signal is maintained until no port requires service Interrupts are level sensitive on the PCI bus The base address and IRQ are automatically detected by the device drivers Quatech supplies for various operating systems For cases where no device driver is available such as for operation under DOS Quatech supplies the QTPCI DOS software utility for manually determi2. 6 2 Hardware Configuration 7 2 1 Factory Default Configuration s 7 2 2 Enable Scratchpad Register SPAD 7 2 3 Force High Speed UART Clock X2 X4 or X8 8 3 Hardware Installation r 4 Address Map and Special Registers 10 4 1 Base Address and Interrupt Level IRQ 10 4 2 Enabling the Special Registers 11 4 3 Interrupt Status Register eese 11 4 4 Options Register sssee ee 12 4 4 1 Enhanced Serial Adapter Identification 12 4 4 2 Clock Rate Multiplier esses 13 5 Windows Configuration EUNPPEROETARERTUESESEOENEESEYCRUPEUEPLCMS 14 5 1 Windows Millennium sees 14 5 2 Windows 2000 2s esc t bod VR Ont eda nn e ode s anda 15 5 9 WINDOWS JS i Aoi nO Len ve Ao rd M e aon E en e A ius 16 5 4 Windows 1995 s aig hoe tr Maw PET bees Qe dad 18 5 5 Using the New Hardware Found Wizard 18 5 6 Viewing Resources with Device Manager 19 5 6 1 Changing Resource Settings with Device Manager 22 6 Other Operating Systems 27 6 1 Windows NT urea 2 cea e ak e UR aeaea rrea 27 6 2 08 2 Susi r A dtt Irt de A dh sd ae eects 27 6 3 DOS and other operating systems sssses 27 6 3 1 Q
3. 2 Double click on the hardware class Multi Port Serial Adapters to list hardware devices in the class 3 The DSC 100 parent device belongs to this hardware class The full device name for the DSC 100 is Quatech DSC 100 Dual Port RS 232 Serial Adapter uatech DSC 100 User s Manual 21 Q Quatech ESC LP 100 PCI Eight Port RS 232 Serial Adapter Pro EJ E3 lUsethisdevice enable amp el 4 Open the Properties dialog for the DSC 100 device then click the Resources tab to view the Input Output Range and Interrupt Request resource allocations Do not change these settings without specific instructions from a Quatech Technical Support Specialist To exit without saving changes click the cancel button 5 Open the Properties dialog for the DSC 100 device then click the Advanced tab to view the clock rate settings Quatech DSC 100 User s Manual 22 Quatech ESC LP 100 PCI Eight Port RS 232 Serial Adapter Pro EJ E3 Driver Resowoes s2160 Data Rate Multiplier Clock Mode Max bps Description Auto 921 600 Auto clock mode enables applications to request any baud rate up to 921 600 The hardware drivers will select the correct clock multiplier based on the baud rate requested X1 115 200 The X1 clock mode mimics a standard COM port The hardware drivers lock the clock to the standard rate The port will run at the
4. DSC 100 Two Channel RS 232 Asynchronous Communications Adapter for PCI bus User s Manual QUATECH INC TEL 330 655 9000 5675 Hudson Industrial Parkway FAX 330 655 9010 Hudson Ohio 44236 http www quatech com WARRANTY INFORMATION Quatech Inc warrants the DSC 100 to be free of defects for five 5 years from the date of purchase Quatech Inc will repair or replace any board that fails to perform under normal operating conditions and in accordance with the procedures outlined in this document during the warranty period Any damage that results from improper installation operation or general misuse voids all warranty rights Please complete the following information and retain for your records Have this information available when requesting warranty service DATE OF PURCHASE MODEL NUMBER DSC 100 PRODUCT DESCRIPTION Two Channel RS 232 Asynchronous PCI Bus Communications Adapter SERIAL NUMBER 1998 2006 Quatech Inc NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Quatech Inc Likewise any software programs that might accompany this document can be used only in accordance with any license agreement s between the purchaser and Quatech Inc Quatech Inc reserves the right to change this documentation or the product to which it refers at any time and without notice The authors have taken due care in the preparation of this do
5. X4 and X8 jumpers are not installed Software can control high baud rates through a combination of changing the clock rate multiplier and the UART baud rate divisor For example a baud rate of 230 4 kbps could be achieved by setting the clock rate multiplier to X2 mode or by applying the X2 jumper and setting a software application for 115 2 kbps Quatech DSC 100 User s Manual 12 5 Windows Configuration 5 1 Windows Millennium 1 After inserting the DSC 100 for the first time the Add New Hardware Wizard will begin Select Search for the best driver for your device Check the Removable media and Specify location box Click the Next button Add New Hardware Wizard 2 Window will locate the proper INF file and copy the file from the CD Click the Next button 3 The final dialog screen will verify the file copy from the CD Click the Finish button Quatech DSC 100 User s Manual 13 5 2 Windows 2000 1 After inserting a DSC 100 for the first time the Add New Hardware Wizard will appear at start up Click the OK button Please insert the Compact Disc labeled Quatech PCI PCMCIA Multiport Serial Driver Installation Disk into your CD ROM drive H and then click OK You can also click OK if you want files to be copied from an alternate location such as a floppy disk or a network server 2 The following dialog box will be displayed Insert the Communications Driver CD shipped with the d
6. a Windows DOS box Figure 14 shows the Basic Mode display for the DSC 100 after the Q key has been pressed In this example the DSC 100 uses I O base address FF80 hex and IRQ 11 The hardware revision of the DSC 100 is also displayed Pressing the N key will show similar information for all non Quatech PCI devices in the system including those devices integrated on the motherboard The QTPCI program is capable only of displaying the PCI configuration It cannot be used to make changes Quatech DSC 100 User s Manual 27 Quatech PCI Configuration Information Display Software Version 1 00 INSTRUCTIONS Press keys listed in the menu at the bottom of the screen This program only displays information It cannot make changes Numbers preceeded by Ox are hexadecimal PCI BIOS detected version 2 10 Quatech PCI adapters detected DSC 100 Two port RS 232 adapter Hardware Revision A1 Uses IRQ 11 Base addr 1 Oxfe80 O Q Quatech PCI adapters M Change to Expert Mode N Other PCI devices X EXIT Figure 14 QTPCLEXE Basic Mode display Figure 15 shows the Expert Mode display for the DSC 100 after the Q key has been pressed The information from the Basic Mode display is presented along with more details such as the Vendor and Device IDs PCI Class Code size of memory and I O regions etc Pressing the N key will show similar information for all non Quatech PCI devices in the system including those d
7. baud rate requested by the application X2 230 400 The X2 clock mode locks the ports hardware clock at double the standard rate The baud rate the port runs at will always be double the rate requested by the applications This mode is useful for legacy applicattions which cannot request baud rates over 115 200 X4 460 800 Quatech DSC 100 User s Manual The X4 clock mode locks the ports hardware clock at 23 four times the standard rate The baud rate the port runs at will always be four times the rate requested by the application This mode is useful for legacy applications which cannot request baud rates over 115 200 The X8 clock mode locks the ports hardware clock at eight times the standard rate The baud rate the port runs at will always be eight times the rate requested by the application This mode is useful for legacy applications which cannot request baud rates over 115 200 6 Double click the hardware class Ports Com and LPT Each Quatech PCI Serial Port listed in this class is a child device of the DSC 100 parent device X8 921 600 7 Open the Properties dialog for a COM port then click the Port Properties tab to view the settings for that port Quatech PCI Serial Port COM3 Properties 8 Click the Port Settings tab and then click the Advanced button The DSC 100 driver will display a custom Advanced Port Settings control which a
8. 0 not used 5 0 not used A 0 not used 3 0 not used 2 0 not used 1 Port 2 1 if interrupt pending 0 Port 1 1 if interrupt pending Figure 8 Interrupt Status Register Quatech DSC 100 User s Manual 10 4 4 Options Register The Options Register allows software to identify the DSC 100 as a Quatech Enhanced Serial Adapter It also allows software to set the UART clock rate multiplier Figure 9 shows the structure of the Options Register The powerup default of the Options Register is all bits zero Bit Name Description 7 MSB ID1 ID bit 1 6 IDO ID bit 0 5 reserved 0 4 reserved 0 3 reserved 0 2 reserved 0 1 RRI Clock rate multiplier bit 1 0 RRO Clock rate multiplier bit 0 Figure 9 Options Register bit definitions 4 4 1 Enhanced Serial Adapter Identification The ID bits are used to identify the DSC 100 is a Quatech Enhanced Serial Adapter Logic operations are performed such that the values read back from these bits will not necessarily be the values that were written to them Bit ID1 will return the logical AND of the values written to ID 1 0 while bit IDO will return their exclusive OR Software can thus identify a Quatech Enhanced Serial Adapter by writing the ID bits with the patterns shown in the write column of Figure 10 then reading the bits and comparing the result with the patterns in the read column Matching read patterns v
9. 0 User s Manual 9 Specifications Bus interface PCI 32 bit bus Universal Signalling Voltage IBM compatible computers Dimensions approx 5 0 x 3 7 Serial ports Controller 16550 with 16 byte FIFOs Interface Two male D 9 connectors or two male D 25 connectors optional using adapter cables Transceivers ICL 3245E or compatible Driver output voltage low 0 4V max high 2 7V min Receiver threshold voltage low 0 6V min high 2 4V max Maximum Baud Rate 921 600 Power requirements 5 volts approx 250 mA Temperature operating 0 to 70 storage 50 to 80 Humidity 10 to 90 Quatech DSC 100 User s Manual Maximum Load pF Data Rate 4 10 15 20 25 kbaud trans trans trans trans trans time time time time time 921 6 N A 100 300 430 470 460 8 100 430 670 900 1100 230 4 330 900 1100 1630 2000 115 2 800 1570 3300 4300 4880 Note 1 The signal transition time ratio is defined as the percentage of the unit interval or bit time the inverse of the data rate that is occupied by the signal transitioning from 3V to 3V The EIA TIA 232 E standard defines a maximum signal transition time ratio of 4 most RS 232 receivers will recognize signal transitions with much larger ratios With a 4 signal transition time ratio EIA TIA 232 E is limited to a theoretical data rate of 200 kbaud If maximum signal transition time ratio is extended to 10 15 20
10. Configuration Figure 2 shows the jumper configuration as shipped from the factory with two spare jumpers applied in neutral positions Remove one or both and apply as shown in following sections to set optional features Figure 2 Factory default jumper configuration 2 0 Enable Scratchpad Register SPAD In the default configuration an Interrupt Status Register see section 4 3 and an Options Register see section 4 4 replace the scratchpad base address 7 of each UART If the SPAD jumper is applied as in Figure 3 the UART scratchpad registers are enabled and the Interrupt Status Register and the Options Register are not available Figure 3 Enable scratchpad registers Quatech DSC 100 User s Manual 6 2 3 Force High Speed UART Clock X2 X4 or X8 These jumpers force an increase of the UART input clock frequency by a factor of two four or eight This can allow legacy software to use baud rates above 115 200 bits per second It is also useful if the serial port device driver does not directly support setting the higher baud rates through the Options Register see section 4 4 If one of these jumpers is applied it overrides any value written to the Options Register to set the clock multiplier by software The effective baud rate will be two four or eight times the value for which the UART itself is programmed The factory default is none of these jumpers applied which allows for software control of the clock mul
11. TPCLEXE redo EEUU bnc dne nee Ad s ni 28 7 External Connections 41 8 PCI Resource Map dette a aA Pan Sa Reale lei a Ne ot sea es anes read ee we 33 9 Specifications Bisset bea aise od eos paca va iow ae eae ase ite a as A ea Re Re Be 34 1 General Information The Quatech Inc DSC 100 provides two RS 232 asynchronous serial communication interfaces for IBM compatible personal computer systems using the PCI expansion bus The DSC 100 uses Quatech s new Enhanced Serial Adapter design Legacy serial port data rates are limited to a maximum of 115 200 bits per second Quatech Enhanced Serial Adapters can achieve data rates as high as 921 600 bits per second As a PCI device the DSC 100 requires no hardware configuration The card is automatically configured by the computer s BIOS or operating system The two serial ports share a single interrupt line and are addressed in a contiguous block of 16 bytes A special interrupt status register is provided to help software to manage the shared interrupt The DSC 100 s serial ports use 16550 Universal Asynchronous Receiver Transmitters UARTs These UARTS contain hardware buffers FIFOs which reduce processing overhead and allow higher data rates to be achieved The 16550 contains a 16 byte FIFO and can transmit and receive data at a rate of up to 921 600 bits per second The 16550 is recommended for heavy multitasking environments and for applications involving high data rates The DSC 100 is supported unde
12. an INF file that defines configurations for Multi function Adapters If no INF files are found click the Browse button and search the Win95 sub directory on the installation disk You are not required to select the file name After finding the directory containing the INF files Windows 95 will choose the correct file 4 The New Hardware Found dialog box will appear again this time for an Unknown Device 5 Again select the radio button for Driver from disk provided by hardware manufacturer Click the OK button to continue 6 Another Install From Disk dialog box will pop up The path should already be pointing to the Quatech disk Click the OK button to continue 7 You should now see the Copying Files dialog box as Windows 95 copies the driver files from the disk 8 The installation utility will ask for your Windows 95 installation disks Serial communication ports require two drivers supplied by Microsoft to function Quatech DSC 100 User s Manual 17 SERIAL VXD and SERIALULDLL Insert the disk or CD and click OK NOTE You may be able to skip this step if you are certain that your system has the latest version of these files installed If you do not have your Windows 95 install disks immediately available click OK anyway A dialog box appears with an option to Skip the files Click the Skip button and the files will not be installed This is all right if the latest version of these drivers are currently in th
13. cument and every attempt has been made to ensure its accuracy and completeness In no event will Quatech Inc be liable for damages of any kind incidental or consequential in regard to or arising out of the performance or form of the materials presented in this document or any software programs that might accompany this document Quatech Inc encourages feedback about this document Please send any written comments to the Technical Support department at the address listed on the cover page of this document DOS Windows ME Windows 2000 Windows 98 Windows 95 Windows NT are trademarks or registered trademarks of Microsoft Corporation OS 2 is a registered trademark of IBM Corporation All other trademarks or registered trademarks are property of their respective owners Declaration of Conformity Manufacturer s Name Manufacturer s Address Application of Council Directive Standards to which Conformity is Declared Type of Equipment Equipment Class Product Name Model Number Quatech Inc 5675 Hudson Industrial Parkway Hudson Ohio 44236 USA 89 336 EEC EN50081 1 ENS55022 EN60555 2 EN60555 3 EN50082 1 IEC 801 2 IEC 801 3 amp IEC 801 4 Information Technology Equipment Commercial Residential amp Light Industrial PCI Dual Serial Communications Card DSC 100 IND a Nos fly guenia ed eae de wh nls ae T ae eats 5 MENU APT 6 1 1 1 IND Option Surge Suppression Upgrade
14. e WINDOWSNSYSTEM directory The New Hardware Found dialog will repeat for each of the serial ports on the DSC 100 as each port is registered with Windows 95 10 Installation is complete 5 6 Viewing Resources with Device Manager This discussion applies equally to Windows 95 98 ME and 2000 XP The following instructions provide step by step instructions on viewing resources used by the DSC 100 in Windows using the Device Manager utility Select StartlHelp from within Windows for additional information on this utility 1 Double click the System icon inside the Control Panel folder This opens up the System Properties box Click the Device Manager tab located along the top of the System Properties box This lists all hardware devices registered inside the Windows registry Additional information is available on any of these devices by click on the device name and then selecting the Properties button Double click the device group Multi function Adapters The DSC 100 model name should appear in the list of Multi function adapters Double click the DSC 100 model name and a properties box should open for the hardware adapter Click the Resources tab located along the top of the properties box to view the resources Windows has allocated for the DSC 100 match the hardware configuration Because PCI is a true plug and play bus do not attempt to modify the configuration values listed Click Cancel to exit without mak
15. erify the presence of the Options Register Write Read ID IDO ID1 IDO 0 0 0 0 0 1 0 1 1 0 0 1 1 1 1 0 Figure 10 ID bit write read table Quatech DSC 100 User s Manual 11 4 4 2 Clock Rate Multiplier A standard RS 232 serial port operates at a clock speed of 1 8432 MHz In order to achieve higher data rates Quatech Enhanced Serial Adapters can operate at two times four times or even eight times this standard clock speed This is controlled by the clock rate multiplier bits in the Options Register Software can determine the UART clock frequency by reading the clock rate multiplier bits RR1 and RRO in the Options Register as shown in Figure 11 RR1 and RRO can be set by writing to the Options Register if the X2 X4 and X8 jumpers are all removed If one of these jumpers is applied the RR1 and RRO bits are forced to the appropriate value Reading the Options Register will always return the clock rate multiplier at which the board is operating Clock Rate UART Clock Maximum Data BEDAE Multiplier Frequency Rate XI 0 0 default 1 8432 MHz 115 2 kbaud 0 1 X2 3 6864 MHz 230 4 kbaud 1 0 X4 7 3728 MHz 460 8 kbaud 1 1 X8 14 7456 MHz 921 6 kbaud Figure 11 Rate Register bit definition At powerup and reset the Options Register is initialized to 0 The DSC 100 will thus powerup in the x1 mode with software control of the clock rate multiplier enabled as long as the X2
16. evice Click the OK button The file aserfilt sus on Quatech PCI PCMCIA Multiport e Serial Driver Installation Disk is needed Type the path where the file is located and then click OK Copy files from m Browse 3 The following dialog box will display the appropriate INF file on the CD in drive Click the OK button 4 Window will copy the INF file from the diskette and display a final dialog indication that the process is complete Click the Finish button Quatech DSC 100 User s Manual 14 5 3 Windows 98 1 After inserting a DSC 100 for the first time the Add New Hardware Wizard will appear at start up Click the Next button 2 Select Search for the best driver for your device Click the Next button Add New Hardware Wizard 3 On the next dialog select the CD ROM drive check box Insert the Communication Drivers CD shipped with the device into the CD ROM drive Click the Next button Quatech DSC 100 User s Manual 15 Add New Hardware Wizard 4 The following dialog box will display the appropriate INF file on the diskette in drive Click the Next button 5 Window will copy the INF file from the diskette and display a final dialog indication that the process is complete Click the Finish button Quatech DSC 100 User s Manual 16 5 4 Windows 1995 Windows 95 maintains a registry of all known hardware installed in your computer Inside this hardware registry Window
17. evices integrated on the motherboard In this example the Base addr 0 resource is reserved Quatech DSC 100 User s Manual 28 For users interested in even more details PCI BIOS information can be displayed by pressing the B key Pressing the I key displays thePCI interrupt routing table Quatech PCI Configuration Information Display Software Version 1 00 Quatech PCI adapters detected DSC 100d Two port RS 232 adapter Vendor ID 0x135c Device id 0x0020 found in slot 0x04 on bus 0x00 Device function code 0x98 Revision ID 0x01 Hardware revision A1 PCI Class Code 0x070200 Communications controller multiport serial Subsystem Vendor ID 0x135c Subsystem Id 0x0050 INTA mapped to IRQ 11 route 0x62 Base addr 0 Oxfc80 O 0X80 bytes allocated Base addr 1 Oxfc20 O 0x20 bytes allocated Q Quatech PCI adapters M Change to Basic Mode N Other PCI devices B PCI BIOS details X EXIT Interrupt routing details Figure 15 QTPCI EXE Expert Mode display Quatech DSC 100 User s Manual 7 External Connections RS 232 C devices are classified by their function as either Data Terminal Equipment DTE or Data Communication Equipment DCE Generally data terminal equipment is defined as the communication source and data communication equipment is defined as the device that provides a communication channel between two DTE type devices Terminal Modem RS 232 C DTE DCE E Telephone line Termina
18. her DTE a null modem cable will be required 5 If possible use a loopback connector to test the port This connector needs to connect the following sets of signals on a D 9 connector TxD and RxD pins 3 and 2 RTS and CTS pins 7 and 8 DCD DTR DSR and RI pins 1 4 6 and 9 Quatech DSC 100 User s Manual 35 DSC 100 User s Manual Revision 1 13 November 2006 940 0138 113 Quatech DSC 100 User s Manual 36
19. ing changes Quatech DSC 100 User s Manual 18 ystem Properties General Device Manager Hardware Profiles Pertarmance View devices by type C View devices by connechon Ay Mausa H Multi function ad amp gbers FH Edere H a Oher devices B di PCMCIA socket EJ Ports COM amp LPT Communications Fart CCOIMT E Communications Fart COME af Printer Port LETT af Quatech Serial Part COMB V Quetech Serial Par COME aff Quetech Seriel Pod COM aff Quetech Serial Pod COME H 3 Sound videa and game controllers HH System devices Figure 12 Windows Device Manager 6 The DSC 100 serial ports are also listed under the group Ports COM and LPT Windows 95 does not assign COM1 COM4 to ports addressed at nonstandard locations The DSC 100 ports will be enumerated starting with COMS or higher even if lower logical numbers are available 7 Select any of the Quatech Serial Ports listed under the group Port COM and LPT and click the Properties button This action opens a properties dialog for the specific COM port on the DSC 100 8 Click the Port Settings tab and then click the Advanced button The DSC 100 driver will display a custom Advanced Port Settings control which allows the ports UART compatibility mode and FIFO threshold levels to be configured The threshold values of full scale for the transmit buffer and 3 4 scale for the receive buffer shown below are optimal for most applications Note tha
20. l Modem RS 232 C DTE DCE d Figure 16 Use of DTEs and DCEs in a communications link DTE and DCE type devices have complementary pinouts to allow terminals and modems to be connected directly using a one to one cable as shown in Figure 16 In many applications DCEs are unnecessary and in these cases a cable called a null modem cable or modem eliminator cable is used to directly connect two DTE type devices A typical null modem cable is also shown in Figure 17 3 RxD TxD 3 3 RxD RxD 3 2 TxD RxD 2 2 TxD un NEUEN TxD 2 4 RTS CTS 4 4 RTS RTS 4 5 CTS RTS 5 5 CTS X cts 5 20 DTR DSR 20 20 DTR Se DTR 20 6 DSR DTR 6 6 DSR DSR 6 8 DCD DCD 8 8 DCD DCD 8 22 RI RI 22 22 RI RI 22 7 GND GND 7 7 GND GND 7 Typical DTE to DCE cable Typical DTE to DTE null modem cable Figure 17 Cabling requirements for RS 232 C devices cables using 25 pin connectors shown Quatech DSC 100 User s Manual 30 The DSC 100 is a DTE device which connects to peripheral equipment through two male D 9 connectors An adapter cable providing two ma
21. le D 25 connectors is available The standard serial port connections are listed in Figure 18 RS 232 Signal DTE DCE Description Connection Connection D 9 D 25 D 9 D 25 Data Carrier Detect DCD 1 8 1 8 Receive Data RxD 2 3 3 2 Transmit Data TxD 3 2 2 3 Data Terminal Ready DTR 4 20 6 6 Signal Ground 5 5 7 Data Set Ready DSR 6 4 20 Request To Send RTS 7 8 5 Clear To Send CTS 8 5 7 4 Ring Indicator RD 9 22 9 22 Figure 18 DS 100 connector definitions for EIA TIA 232 E OO OLO 9ooQG D 9 connector CN2 and CN3 Figure 19 DS 100 Output connectors Quatech DSC 100 User s Manual OOOOOOQOOOOOOO OOOGOOOOOOO D 25 connector using adapter cable 31 8 PCI Resource Map Listed below are the PCI resources used by the DSC 100 Such information may be of use to customers writing their own device drivers or other custom software A detailed description of the DSC 100 s UARTS is available on the Quatech web site all numbers in hex PCI Vendor ID 0x135C Quatech Inc PCI Device ID 0x0181 DSC 100 PCI Class Code Base class 0x07 Simple communications controller Subclass 0x02 Multiport serial controller Interface 0x00 IRQ sourced by INTA Base address 0 0x80 bytes memory Reserved region Base address 1 0x80 bytes I O Base address 2 0x10 bytes I O Serial ports Port 1 at offset 0 Port 2 at offset 8 Quatech DSC 10
22. llows the ports UART compatibility mode and FIFO threshold levels to be configured The threshold Quatech DSC 100 User s Manual 24 values of full scale for the transmit buffer and 34 scale for the receive buffer are optimal for most applications Note that the FIFO option for each of the DSC 100 s ports is configured independently Advanced Settings for Quatech PCI Serial Port COM3 Quatech DSC 100 User s Manual 25 6 Other Operating Systems Device drivers for Windows NT and OS 2 are also available for the DSC 100 The board can be used under DOS and other operating systems as well in many circumstances The software described below can be downloaded from the Quatech web site if it did not come with the board 6 1 Windows NT The Windows NT device driver is installed by running the SETUP program Up to 256 serial ports are supported There is a command line based configuration utility which is used for adding PCI bus and ISA bus serial ports Please refer to the documentation included with the device driver for full installation and configuration details 6 2 OS 2 The OS 2 device driver supports up to 32 serial ports in a system Installation is a manual but simple process Please refer to the documentation included with the device driver for full installation and configuration details 6 3 DOS and other operating systems The DSC 100 is not a direct drop in replacement for a legacy serial port because its base addre
23. ning the resources used See section 6 1 1 for details Quatech DSC 100 User s Manual 9 4 2 Enabling the Special Registers The DSC 100 contains two unique registers an Interrupt Status Register and an Options Register These registers are enabled when the SPAD jumper is removed factory default They replace the UART Scratchpad Register on accesses to register address 7 The Interrupt Status Register and Options Register are accessed through the scratchpad location of either UART The DLAB bit of the UART Line Control Register bit 7 is used to select between the two registers The most recent write of a DLAB bit ineither UART selects between the two registers as shown in Figure 7 Register selected for DLAB Bit SPAD Jumper address 7 accesses 0 removed Interrupt Status Register 1 removed Options Register X applied Scratchpad Registers Figure 7 DLAB bit selects between special registers 4 3 Interrupt Status Register The read only Interrupt Status Register can be used to quickly identify which serial ports require servicing after an interrupt Reading the Interrupt Status Register will return the interrupt status of the entire DSC 100 as shown in Figure 8 The individual bits are cleared as the interrupting ports are serviced The interrupt service routine should ensure that the interrupt status register reads zero before exiting Bit Description 7 MSB 0 not used 6
24. or even 25 the maximum data rate achievable using EIA TIA 232 E can be increased past 200 kbaud Note 2 A typical value for capacitance per foot of standard cable is 50 pF ft Quatech DSC 100 User s Manual 34 10 Troubleshooting Listed here are some common problems and frequent causes of those problems If the information here does not provide a solution contact Quatech technical support Any unauthorized repairs or modifications will void the DSC 100 s warranty Computer will not boot up 1 Is the DSC 100 properly inserted Remove the card and try again Perhaps try a different expansion slot 2 Ensure that an ISA bus card is not using the same IRQ that the PCI BIOS tries to assign to the DSC 100 Most computers have BIOS setup options to reserve IRQs for either ISA or PCI use Try reserving the IRQ for the ISA card The BIOS will automatically choose a different IRQ for the DSC 100 An address conflict is unlikely because most PCI based computers will assign I O addresses in such a way that they cannot conflict with ISA bus devices 3 The DSC 100 may be defective Contact technical support for instructions Cannot communicate with other equipment 1 Are the cable connections correct Are the cables securely attached 2 Is the software configured with the correct base address and IRQ information for the DSC 100 This is mainly a DOS issue 3 Is the device driver installed 4 If you are trying to communicate with anot
25. r several popular operating systems and environments Contact the sales department for details on current software offerings Most device drivers are available for download from the Quatech world wide web site at http www quatech com Quatech DSC 100 User s Manual 4 1 1 Features The standard DSC 100 implements each of its communication channels with a 16550 UART and uses standard line driver and receiver components For improved performance and industrial grade reliability Quatech offers the following board upgrades 1 1 1 IND Option Surge Suppression Upgrade The IND option provides the protection essential for reliable use in an industrial environment Each communication line has a surge suppressor capable of sustaining up to 40A 20us peak transient surges a clamping voltage of 30V and a peak energy dissipation of 0 1 Joules IND Option DSC 100 DSC 100IND Figure 1 DSC 100 Product Series Summary Quatech DSC 100 User s Manual 2 Hardware Configuration The DSC 100 is automatically configured at boot time by the computer s BIOS or operating system There are no required switches or jumpers to set for installation This chapter lists a number of optional jumper settings that control various hardware features These jumpers are grouped together at the end of the board opposite the D 9 connectors Any changes from the factory default should be made before installing the DSC 100 in the computer 2 1 Factory Default
26. s 95 keeps track of all of your system resources such as I O locations IRQ levels and DMA channels The Add New Hardware Wizard utility in Windows 95 was designed to add new hardware and update this registry An INF configuration file is included with the DSC 100 to allow easy configuration in the Windows 95 environment Also a custom Windows 95 serial device driver is included with the DSC 100 to support the use of the 16550 UART s 16 byte FIFO Windows 95 uses the INF file to determine the system resources required by the DSC 100 searches for available resources to fill the boards requirements and then updates the hardware registry with an entry that allocates these resources 5 5 Using the New Hardware Found Wizard The following instructions provide step by step instructions on installing the DSC 100 in Windows 95 using the New Hardware Found wizard 1 After booting the computer with a newly installed DSC 100 the New Hardware Found dialog box will appear If you have never installed a Quatech PCI communications adapter before the dialog box may simply indicate that it has found a PCI Card 2 Select the radio button for Driver from disk provided by hardware manufacturer Click the OK button to continue 3 An Install From Disk dialog box should pop up Insert the disk with the Quatech INF files on it select the correct drive letter and click the OK button Windows 95 automatically browses the root directory for
27. ss and IRQ cannot be fixed at values such as 3F8 hex IRQ 4 COMI or 2F8 hex IRQ 3 COMO etc Rather the system BIOS assigns the address and the IRQ in a plug and play fashion at boot time Software which is to use the DSC 100 must be able to accommodate any valid assignments of these resources For Windows 95 98 2000 ME Windows NT and OS 2 the Quatech device drivers determine what the resource assignments are and proceed accordingly In other cases however the user must intervene The discussion below will center on DOS but the concepts can be applied to other operating systems as well Many DOS applications support user configuration of the base address and IRQ of a serial port Such applications can generally make use of the DSC 100 Older applications as well as some custom software may use hard coded standard legacy serial port addresses These applications will require modifications if they are to use the DSC 100 Custom applications for which the customer has source code can be modified to make just a few PCI BIOS function calls to obtain all the necessary configuration information The PCI BIOS specification can be obtained from the PCI Special Interest Group Contact Quatech technical support for more information Quatech DSC 100 User s Manual 26 6 3 1 QTPCI EXE Quatech s QTPCT utility supplies the information required when modifying the serial port settings of the application This program should be run from real DOS not in
28. t the FIFO option for each of the DSC 100 s two ports is configured independently Quatech DSC 100 User s Manual 19 Advanced Port Settings a Figure 13 Windows Device Manager 9 Use the Logical COM Port names to access the serial ports on your DSC 100 through your software applications Note The Logical COM Port name is assigned to your ports by Windows This name is required by a Windows application when accessing a particular port Quatech DSC 100 User s Manual 20 5 6 1 Changing Resource Settings with Device Manager 1 Start the Windows 95 98 ME Device Manager aj F zz Device Manager action we e gt Gi 2 Baw 3 Floppy disk controllers 9 Floppy disk drives amp IDE ATA ATAPI controllers Keyboards A Mice and other pointing devices J Multi port serial adapters Quatech ESC LP 100 PCI Eight Port RS Serial Adapter BI Network adapters Other devices JJ Ports COM amp LPT I Communications Port COM1 aF Printer Port LPT1 aF Quatech PCI Serial Port COM10 aF Quatech PCI Serial Port COM3 F Quatech PCI Serial Port COM4 aF Quatech PCI Serial Port COMS F Quatech PCI Serial Port COM6 X Quatech PCI Serial Port COM RJ Quatech PCI Serial Port COM8 aF Quatech PCI Serial Port COM9 qp Sound video and game controllers Wil System devices Universal Serial Bus controllers TR RI
29. tiplier via the Options Register The Options Register powerup default is for a standard times 1 clock of 1 8432 MHz for compatibility with standard serial ports X8 X4 OO xe Factory default Force times two clock software control Baud rates up to 230 4 kbps OO QO E OO QO OO Force times eight clock Force times four clock Baud rates up to 921 6 kbps Baud rates up to 460 8 kbps Figure 4 Clock multiplier jumper options Quatech DSC 100 User s Manual 7 3 Hardware Installation 1 Turn off the power of the computer system in which the DSC 100 is to be installed 2 Remove the system cover according to the instructions provided by the computer manufacturer 3 Make any desired optional jumper setting changes 4 Install the DSC 100 in any empty PCI expansion slot The board should be secured by installing the Option Retaining Bracket ORB screw 5 Replace the system cover according to the instructions provided by the computer manufacturer 6 Attach and secure the cable connectors to the desired equipment 7 Turn on the power of the computer system The output of the DSC 100 is a pair of 9 pin D connectors All modem control signals RTS DTR CTS DSR DCD RI are provided to each port Serial Port 2 Clock multiplier scratchpad select b
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