Quatech Asynchronous Communications Adapter for PCI bus... User manual

DSCLP/SSCLP-100
Two Channel Low Profile RS-232
Asynchronous Communications Adapter
for PCI bus
User's Manual
QUATECH, INC. TEL: [phone]
5675 Hudson Industrial Parkway FAX: [phone]
Hudson, Ohio 44236 http://www.quatech.com
1 DSCLP/SSCLP-100 User's Manual

WARRANTY INFORMATION
Quatech, Inc. warrants the DSCLP-100 or SSCLP-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: DSCLP-100 or SSCLP-100
PRODUCT DESCRIPTION: Two or One Channel Low Profile RS-232
Asynchronous PCI Bus Communications Adapter
SERIAL NUMBER:

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 andQuatech, 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 document 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 95/98/2000/ME, 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.
3 DSCLP/SSCLP-100 User's Manual

Declaration of Conformity
Manufacturer's Name: Quatech Inc.
Manufacturer's Address: 5675 Huson Industrial Parkway
Akron, Ohio 44236 (USA)
Application of Council Directive: 89/336/EEC
Standards to which
Conformity is Declared: * EN50081-1 (EN55022,
EN60555-2, EN60555-3)
* EN50082-1 (IEC 801-2,
IEC 801-3, & IEC 801-4)
Type of Equipment: Information Technology
Equipment
Equipment Class: Commercial, Residential, & Light
Industrial
Product Name: PCI Two Port or One Port Serial
Communications Card
Model Number : DSCLP-100 / SSCLP-100
4 DSCLP/SSCLP-100 User's Manual

Table of Contents
39
10 Troubleshooting .................................
37
9 Specifications ......................................
36
8 PCI Resource Map ...............................
34
7 External Connections ............................
32
6.3.1 QTPCI.EXE ..................................... 31
6.3 DOS and other operating systems ................... 31
6.2 OS/2 ............................................... 31
6.1 Windows NT ....................................... 31
6 Other Operating Systems .......................
24
5.6.1 Changing Resource Settings with Device Manager .21
5.6 Viewing Resources with Device Manager ............ 20
5.5 Using the "New Hardware Found" Wizard .......... 20
5.4 Windows 95 ........................................ 19
5.3 Windows 98 ........................................ 18
5.2 Windows 2000 ...................................... 17
5.1 Windows Millennium ............................... 17
5 Windows Configurations ........................
16
4.4.2 Clock Rate Multiplier ............................ 15
4.4.1 Enhanced Serial Adapter Identification ........... 15
4.4 Options Register .................................... 14
4.3 Interrupt Status Register ............................ 14
4.2 Enabling the Special Registers ...................... 13
4.1 Base Address and Interrupt Level (IRQ) ............. 13
4 Address Map and Special Registers ...........
11
3 Hardware Installation ...........................
10
2.3 Force High-Speed UART Clock (X2 or X4, J4-J5) .... 9
2.2 Enable Scratchpad Register (SPAD, J2) .............. 9
2.1 Factory Default Configuration ....................... 9
2 Hardware Configuration .........................
8
1 General Information ..............................
5 DSCLP/SSCLP-100 User's Manual

1 General Information
The Quatech, Inc. DSCLP-100 (two-port) and SSCLP-100 (one-port)
provide RS-232 asynchronous serial communication interfaces for Low Profile
IBM-compatible personal computer systems using the PCI expansion bus. The
DSCLP-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. This manual
usually refers to the DSCLP-100. All information pertains equally to the
SSCLP-100, with the exception that with the SSCLP there is just one port instead
of two.As a PCI device, the DSCLP-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 DSCLP-100's serial ports are implemented using 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 DSCLP-100 is supported under 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.
6 DSCLP/SSCLP-100 User's Manual

2 Hardware Configuration
The DSCLP-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. Jumpers J2, J4-J5 are grouped together at the end of the board
opposite the D-type connector (D-25 for DSCLP, D-9 for SSCLP). Any changes
from the factory default should be made before installing theDSCLP-100 in the
computer.
2.1 Factory Default 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.
SPAD
X2
X4
J2
J4
J5
Figure 2 --- Factory default jumper configuration
2.2 Enable Scratchpad Register (SPAD, J2)
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.
SPAD
X2
X4
J2
J4
J5
Figure 3 --- Enable scratchpad registers
7 DSCLP/SSCLP-100 User's Manual

2.3 Force High-Speed UART Clock (X2 or X4, J4-J5)
These jumpers force an increase of the UART input clock frequency by a
factor of two or four. This feature 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 either two or four 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 multiplier 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.
SPAD
X2
X4
J2
J4
J5
Force times-two clock
Baud rates u
p
to 230.4 kb
p
s
SPAD
X2
X4
J2
J4
J5
Factory default
software control
SPAD
X2
X4
J2
J4
J5
Force times-four clock
Baud rates u
p
to 460.8 kb
p
s
Figure 4 --- Clock multiplier jumper options
8 DSCLP/SSCLP-100 User's Manual

3 Hardware Installation
1. Turn off the power of the computer system in which the DSCLP-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 DSCLP-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 DSCLP-100 is a 25-pin D-connector. A cable is
provided to convert the D-25 into two standard male D-9 connectors with all
control signals provided to each port (RTS, DTR, CTS, DSR, DCD, and RI).
The output of the SSCLP-100 is one standard male D-9 connector.
J2
J4
J5 X2
X4
SPAD
Clock multiplier/
scratchpad select
Figure 5 --- Jumper/connector locations
9 DSCLP/SSCLP-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 DSCLP-100.
4.1 Base Address and Interrupt Level (IRQ)
The base address and IRQ used by the DSCLP-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, for a total
of 16 contiguous bytes, as shown in Figure 6.
Base Address + 8 to Base Address + 15Serial 2
Base Address + 0 to Base Address + 7Serial 1
I/O Address RangePort
Figure 6 --- Port Address Map
All serial ports share the same IRQ. The DSCLP-100 signals a hardware
interrupt when any port requires service. The interrupt signal is maintained until
no port requires service. Interrupts are level-sensitive on thePCI 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 determining the resources used. Seesection
6.3.1 for details.
10 DSCLP/SSCLP-100 User's Manual

4.2 Enabling the Special Registers
The DSCLP-100 contains two unique registers, an Interrupt Status
Register and an Options Register. These registers are enabled when the SPAD
jumper (J2) is removed (factory default). They replace theUART Scratchpad
Register on accesses to register address 7.
The Interrupt Status Register and Options Register are accessed through
the scratchpad location of any 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 in any UART selects between the two registers as shown in Figure
7.
Scratchpad RegistersappliedX Options Registerremoved1 Interrupt Status Registerremoved0
Register selected for
address 7 accesses
SPAD JumperDLAB Bit
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 DSCLP-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.
Port 1 --- 1 if interrupt pending0
Port 2 --- 1 if interrupt pending1
0 (not used)2
0 (not used)3
0 (not used)4
0 (not used)5
0 (not used)6
0 (not used)7 (MSB)
DescriptionBit
Figure 8 --- Interrupt Status Register
11 DSCLP/SSCLP-100 User's Manual

4.4 Options Register
The Options Register allows software to identify the DSCLP-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.
Clock rate multiplier bit 0RR00
Clock rate multiplier bit 1RR11
(reserved, 0)-2
(reserved, 0)-3
(reserved, 0)-4
(reserved, 0)-5
ID bit 0ID06
ID bit 1ID17 (MSB)
DescriptionNameBit
Figure 9--- Options Register bit definitions
4.4.1 Enhanced Serial Adapter Identification
The ID bits are used to identify theDSCLP-100 as 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 ID0
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 verify the presence of the Options Register.
0111 1001 1010 0000 ID0ID1ID0ID1 ReadWrite
Figure 10 --- ID bit write/read table
12 DSCLP/SSCLP-100 User's Manual

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 RR0 in the Options Register as shown in Figure 11.
RR1 and RR0 can be set by writing to the Options Register if the X2 and X4
jumpers (J4-J5) are all removed. This card has the 16550 UART. If one of these
jumpers is applied, the RR1 and RR0 bits are forced to the appropriate value.
Reading the Options Register will always return the clock rate multiplier at which
the board is operating.
921.6 kbaud14.7456 MHzX8*11 460.8 kbaud7.3728 MHzX401 230.4 kbaud3.6864 MHzX210
115.2 kbaud1.8432 MHz
X1
(default)
00
Maximum Data
Rate
UART Clock
Frequency
Clock Rate
Multiplier
RR0RR1
Figure 11 --- Rate Register bit definition
*x8 mode is only accessable via sotware control
At powerup and reset, the Options Register is initialized to 0. The
DSCLP-100 will thus powerup in the x1 mode with software control of the clock
rate multiplier enabled as long as the X2 or X4 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.
13 DSCLP/SSCLP-100 User's Manual

5 Windows Configurations
5.1 Windows Millennium
1. After inserting the DSCLP-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.
2. Window will locate the proper INF file and copy the file from theCD.
Click the "Next" button.
3. The final dialog screen will verify the file copy from theCD.
Click the "Finish" button.
14 DSCLP/SSCLP-100 User's Manual

5.2 Windows 2000
1. After inserting a DSCLP-100 for the first time, the "Add New Hardware
Wizard will appear at start up. Click the "OK" button.
2. The following dialog box will be displayed. Insert the Quatech COM CD
(shipped with the device). Click the "OK" button.
3. The following dialog box will display the appropriate INF file on theCD
in the drive. Click the "OK" button.
4. Window will copy the INF file from the CD and display a final dialog
indication that the process is complete. Click the "Finish" button.
15 DSCLP/SSCLP-100 User's Manual

5.3 Windows 98
1. After inserting a DSCLP-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.
3. On the next dialog, select the "CD-ROM DRIVE" check box. Insert the
Quatech COM CD (shipped with the device) into the CD-ROM drive.
Click the "Next" button.
16 DSCLP/SSCLP-100 User's Manual

4. The following dialog box will display the appropriate INF file on the
disk in the drive. Click the "Next" button.
5. Window will copy the INF file from the disk and display a final dialog
indication that the process is complete. Click the "Finish" button.
5.4 Windows 95
Windows 95 maintains a registry of all known hardware installed in your
computer. Inside this hardware registry Windows 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 theDSCLP-100 to allow easy
configuration in the Windows 95 environment.
17 DSCLP/SSCLP-100 User's Manual

5.5 Using the "New Hardware Found" Wizard
The following instructions provide step-by-step instructions on installing
the DSCLP-100 in Windows 95 using the "New Hardware Found" wizard.
1. After booting the computer with a newly-installed DSCLP-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 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: SERIAL.VXD and SERIALUI.DLL. Insert the disk or CD and
click "OK".
18 DSCLP/SSCLP-100 User's Manual

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 the
\WINDOWS\SYSTEM directory.
9. The "New Hardware Found" dialog will repeat for each of the serial ports
on the DSCLP-100 as each port is registered with Windows 95.
10. Installation is complete.
19 DSCLP/SSCLP-100 User's Manual

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 DSCLP-100 in Windows using the "Device Manager" utility. Select
Start|Help 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.
2. 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.
3. Double click the device group "Multi-function Adapters". The
DSCLP-100 model name should appear in the list of Multi-function
adapters.
4. Double click the DSCLP-100 model name and a properties box should
open for the hardware adapter.
5. Click the "Resources" tab located along the top of the properties box to
view the resources Windows has allocated for the DSCLP-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 making changes.
20 DSCLP/SSCLP-100 User's Manual