QSP-200/300
Four Channel Asynchronous
RS-422/485 PCMCIA Adapter
INTERFACE CARDS FOR PERSONAL COMPUTERS
User's Manual
Quatech, Inc.
5675 Hudson Industrial Parkway
Hudson, Ohio 44236
TEL:(330) 655-9000
FAX: (330) 655-9010
WWW:quatech.com
QSP-200/300 User's Manual
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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 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.
Copyright ©2004
Quatech Inc.
5675 Hudson Industrial Parkway
Hudson, Ohio 44236
All rights reserved. Printed in the U.S.A.
Trademarks:
Quatech is a trademark of Quatech Inc. Other product and company names are registered trademarks or
trademarks of their respective holders.
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Compliances - Electromagnetic Emissions
EC - Council Directive 89/336/EEC
This equipment has been tested and found to comply with the limits of the following standards for a digital device:
; EN50081-1
(EN55022, EN60555-2, EN60555-3)
; EN50082-1
(IEC 801-2, IEC 801-3, IEC 801-4)
Type of Equipment:
Equipment Class:
Information Technology Equipment
Commercial, Residential, & Light Industrial
FCC - Class B
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio frequency energy and if not installed
and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation, If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
; Reorient or relocate the receiving antenna.
; Increase the separation between the equipment and receiver.
; Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
; Consult the dealer or an or an experienced radio/TV technician for help.
This equipment has been certified to comply with the limits for a Class B computing device, pursuant to FCC Rules.
In order to maintain compliance with FCC regulations, shielded cables must be used with this equipment. Operation
with non-approved equipment or unshielded cables is likely to result in interference to radio and TV reception. The
user is cautioned that changes and modifications made to the equipment without the approval of the manufacturer
could void the user's authority to operate this equipment.
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Table of Contents
2
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Windows 95/98/ME/2000/NT Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Installing a Quatech QSP-200/300 Under Windows 95/98/ME/2000 . . . . . . . . . . . . 4
2.1.1 Windows 95/98 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1.2 Window Millennium (ME) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1.3 Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1 Installing QSP-200/300 Under Windows NT . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.4 Window 95/98/ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.5 Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
11
2.2 Changing Configuration of the QSP-200/300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Windows 95/98/ME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.2 Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
14
16
17
3 Windows CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 DOS / Windows 3.x Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 QSP-200/300 Client Driver for DOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 Client Driver Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1.2 Command Line Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1.3 QSP-200/300 Client Driver Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.4 Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
23
4.2 QSP-200/300 Enabler for DOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2.1 Command Line Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2.2 QSP-200/300 Enabler Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.3 Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
30
31
5 OS/2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Command Line Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1.1 Configuring With "System Assigned" Resources . . . . . . . . . . . . . . . . . . . . . 31
5.1.2 Configuring With "User Assigned" Resources . . . . . . . . . . . . . . . . . . . . . . . 32
5.1.3 Advanced Configuration Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
34
35
36
36
36
37
5.2 Monitoring The Status Of PCMCIA Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Hardware Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Port Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Scratchpad / Interrupt Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Auxiliary Channel Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.1 Auxiliary Channel: RTS-CTS Handshaking . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.3.2 Auxiliary Channel: Handshaking Disabled . . . . . . . . . . . . . . . . . . . . . . . . . 38
39
39
41
43
6.4 Termination Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5 2-Wire Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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QSP-200/300 User's Manual
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1 Introduction
The Quatech QSP-200/300 provides four independent RS-422/485 asynchronous serial
communications interfaces for systems equipped with PCMCIA Type II and/or Type III
expansion sockets. The QSP-200/300 is a PCMCIA Type II (5 mm) card and is PCMCIA PC
Card Standard Specification 2.1 compliant.
The QSP-200/300's serial ports are implemented using 16C550 Universal Asynchronous
Receiver/Transmitters (UARTs) which are the recommended communications interface for
multitasking environments and with applications involving high data transfer rates.
The QSP-200/300's four serial ports are addressed in a single 32 byte I/O block for simplified
programming and all four channels share a common interrupt (IRQ). A special interrupt status
register is also available to simplify the software required to service multiple serial ports in an
interrupt driven environments.
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2 Windows 95/98/ME/2000/NT Installation
Windows 95/98 maintains a registry of all known hardware installed within the computer. Inside
this hardware registry Windows 95/98 keeps track of all the computer's resources, such as base
I/O addresses, IRQ levels, and DMA channels. In the case of a PC Card (PCMCIA) type board,
Windows 95/98 configures the new hardware using free resources it finds within the hardware
registry, and updates the registry automatically.
Windows 95/98 handles the QSP-200/300 as a "parent/child device". The QSP-200/300 is the
"parent device". Each serial port is a "child device" of this "parent device". To allow easy
configuration of Quatech's QSP-200/300, two configuration files have been written. These files
are called "INF" files. The "QSP-200.INF" file describes the resources of the QSP-200/300
parent device and indicates the number of child devices. There are 4 child COM ports for the
QSP-200/300. The "MLTPT_SP.INF" file describes the settings for each serial port including
all the necessary device drivers.
Windows 95/98 allows changes in the system resources if the default choices are unacceptable.
But first, allow Windows 95/98 to configure all of the devices. Since the child COM ports are
dependent on the parent devices resource allocations, the resources can only be modified at the
parent device. Changing these resources is an easy task described in a later section.
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2.1 Installing a Quatech QSP-200/300 Under Windows 95/98/ME/2000
2.1.1 Windows 95/98
1. Insert the QSP-200/300 into any available PC Card socket.
2. The first time a new PC Card is installed the Add New Hardware Wizard window
opens. After the first installation, Windows 95/98 will automatically detect and
configure the card. If the Add New Hardware Wizard window does not open, then
skip to the next section, "Viewing the QSP-200/300 Settings".
3. The Add New Hardware Wizard window provides several options to configure the
QSP-200/300 card. Click the "Driver from Disk" option button. Click "OK" to
continue.
4. Insert the QSP-200/300 Quatech COM CD into the drive, select the correct drive
letter, and click "OK". Windows 95/98 will browse for the aforementioned files.
5. During the installation process, it may be required to supply the computer with the
Windows 95/98 CD. Insert the CD when prompted and click "OK"
.
IMPORTANT NOTE:
If the user has previously used any of the PC's COM ports and the
Windows 95/98 installation CD is not available, the user may be
able to skip this step. When prompted for the Windows installation
CD, click the "Skip" button to abort copying of the serial
communication drivers. If these drivers are already present on the
PC, the currently installed drivers will be used.
6. The QSP-200/300 PC Card should now be configured. In the future, Windows 95/98
will automatically recognize and configure the QSP-200/300.
2.1.2 Window Millennium (ME)
1. Insert Quatech COM driver CD into the CD-ROM
2. Insert the QSP-200/300 into any available PC Card socket.
3. The ‘Add New Hardware Wizard’ will open. Select ‘Automatic search for a
better driver’
Windows Millennium will automatically search a install the correct driver for this device.
2.1.3 Windows 2000
1. Insert Quatech COM driver CD into the CD-ROM
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2. Insert the QSP-200/300 into any available PC Card socket.
Windows 2000 will automatically install the driver for this device.
2.1.1 Installing QSP-200/300 Under Windows NT
To allow easy configuration of the QSP-200/300 the Quatech Device Manager for Windows NT
has been written for the hardware. This configuration utility supports the QSP-200/300 only in
block addressing mode.
To begin the installation, open Windows Explorer and search for the ‘Setup.exe’ command to
install the Quatech Device Manager. <See following Windows Explorer figure.> (D:\Serial Port
Adapters\Drivers\Windows NT 4.0 for PCI, PCMCIA,ISA). Once the installation is complete an
icon will be placed on the desktop.
Windows NT Exporer
1. Locate and double click the Quatech Device Manager icon on the desktop.
Device Manager Icon on Desktop
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2.
Click the ‘Add’ button at the bottom of the Quatech Device Manager
Window.
3. Follow the steps for the ‘Add Quatech Hardware Wizard’.
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4. Complete the final steps of the installation, insert the PCMCIA Card and re-boot the
computer.
v
Additional help is availabe online
The QSP-200/300 PC Card should now be configured. In the future, Windows NT will
automatically recognize and configure the QSP-200/300.
Note: Windows NT does not support ‘Plug and Play’ for PCMCIA cards. The PCMCIA Card
must be inserted prior to starting Windows NT and can not be removed and reinserted while
Windows NT is running.
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Viewing the QSP-200/300 Resource Settings
The following steps detail how to view the resource settings that Windows 95/98/ME/2000 has
allocated for the QSP-200/300.
2.1.4 Window 95/98/ME
1. Double click on the My Computer icon located on the Windows 95/98 desktop. This
opens a folder showing various drives, Control Panel, etc.
2. Double click on the Control Panel icon. This opens another folder with many
different system utilities.
3. Double click on the System icon. This opens the "System Properties" window.
4. Click on the "Device Manager" tab. Double click on the item "Ports (Com &
LPT)" located within the list of hardware.
5. Double click on any of the items labeled "Quatech Multi- port(COM x)" where x
represents the logical COM port number. The items labeled "Quatech Multi-port"
are the child devices of the QSP-200/300 parent device. Click the "Resources" tab
at the top of the "System Properties" box.
6. The base I/O address and IRQ level displayed here is the base I/O address and IRQ
level of the entire parent device. The resources cannot be modified here. For
information on how to change these settings, got to the section labeled "Changing
Configuration of the QSP-200/300".
7. Use the Logical Com Port name to access any of the particular serial ports on the
QSP-200/300. This name is required by a Windows 95/98 application when
accessing a particular port.
2.1.5 Windows 2000
1. Double click on the My Computer icon located on the Windows 2000 desktop. This
opens a folder showing various drives, Control Panel, etc.
2. Double click on the Control Panel icon. This opens another folder with many
different system utilities.
3. Double click on the System icon. This opens the "System Properties" window.
4. Click on the "Hardware" tab. Click on the ‘Device Manager’. Double click on the
item "Ports (Com & LPT)" located within the list of hardware.
5. Double click on any of the items labeled "Quatech PCMCIA Serial Port(COM x)"
where x represents the logical COM port number. The items labeled "Quatech
PCMCIA Serial Port" are the child devices of the QSP-200/300 parent device.
Right click on the chosen child device and choose "Properties".
6. The base I/O address and IRQ level displayed here is the base I/O address and IRQ
level of the entire parent device. The resources cannot be modified here. For
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information on how to change these settings, got to the section labeled "Changing
Configuration of the QSP-200/300".
7. Use the Logical Com Port name to access any of the particular serial ports on the
QSP-200/300. This name is required by a Windows 2000 application when accessing
a particular port.
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2.2 Changing Configuration of the QSP-200/300.
To change the hardware configuration of the QSP-200/300, follow the instructions below.
2.2.1 Windows 95/98/ME
1. Double click the My Computer icon located on the Windows 95/98/ME desktop.
2. Double click on the Control Panel icon.
3. Double click the System icon inside the Control Panel folder. This will open the
System Properties box.
4. Click the Device Manager tab located along the top of the System Properties box.
5. Double click on the device group "Quatech Comm Adapters". The QSP-200/300
model name should appear in this list. If either the "Quatech Comm
Adapters" group or the QSP-200/300 model number does not appear, contact
Quatech Technical Support for further assistance.
6. Click on the QSP-200/300 item and then click on the button labeled "Properties".
7. Un-check the box "use automatic settings". This keeps Windows from changing the
resource settings when the system is restarted.
8. Select a "Basic Configuration" from the list box. Each "Basic Configuration" is
associated with a specific set of handshake and output driver options as listed in the
table below (a functional description of these options are contained in the section
Hardware Information).
9. If a change in I/O address and / or IRQ setting is required, select the resource to be
modified (I/O or IRQ) and select "Change Settings". Make the desired changes and
then click on "OK". A shutdown of the system may be required to allow the settings
to change. If prompted for a shutdown, select the option which restarts Windows 95.
10. The QSP-200/300 will be automatically reconfigured to the desired settings.
11. The card is now ready for use.
2.2.2 Windows 2000
1. Double click the My Computer icon located on the Windows 2000 desktop.
2. Double click on the Control Panel icon.
3. Double click the System icon inside the Control Panel folder. This will open the
System Properties box.
4. Click the Device Manager button located in the center of the System Properties box.
5. Double click on the device group "Quatech Multiport Serial Devices". The
QSP-200/300 model name should appear in this list. If either the "Quatech Comm
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Adapters" group or the QSP-200/300 model number does not appear, contact
Quatech Technical Support for further assistance.
6. Click on the ‘Quatech QSP-200/300 PCMCIA Four-Port RS-422/465 Serial
Adapter’ item and then click on the button labeled "Properties".
7. Un-check the box "use automatic settings". This keeps Windows from changing the
resource settings when the system is restarted.
8. Select a "Basic Configuration" from the list box. Each "Basic Configuration" is
associated with a specific set of handshake and output driver options as listed in the
table below (a functional description of these options are contained in the section
Hardware Information).
9. If a change in I/O address and / or IRQ setting is required, select the resource to be
modified (I/O or IRQ) and select "Change Settings". Make the desired changes and
then click on "OK". A shutdown of the system may be required to allow the settings
to change. If prompted for a shutdown, select the option which restarts Windows 95.
10. The QSP-200/300 will be automatically reconfigured to the desired settings.
11. The card is now ready for use.
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Basic
Configuration
0000
I/O
any
any
any
any
any
any
any
any
any
any
any
any
IRQ
any
any
any
any
any
any
any
any
any
any
any
any
Handshake Mode
loopback enabled
loopback enabled
loopback enabled
loopback disabled
loopback disabled
loopback disabled
loopback enabled
loopback enabled
loopback enabled
loopback disabled
loopback disabled
loopback disabled
Output Mode
always enabled
RTS controlled
DTR controlled
always enabled
RTS controlled
DTR controlled
always enabled
RTS controlled
DTR controlled
always enabled
RTS controlled
DTR controlled
0001
0002
0003
0004
0005
0006
0007
0008
0009
000A
000B
Figure 1. Windows 95/98 configuration options.
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3 Windows CE
The Quatech PCMCIA Windows CD installation copies a multiple device-specific .cab files
and the ini file to your desktop computer and launches the Application Manger (which
resides on the user's desktop computer as a result of installing Active Sync) with the
Application Manager .ini file as a parameter. This in turn will install the driver onto the
Windows CE connected device or if not connected will install it on the next device
connection to the desktop.
1.1Installing Quatech PCMCIA Cards under Windows CE
1. Connect and establish communication to the device to the desk to using Active Sync
(refer to Active Sync factory documentation
2. Locate and run the setup.exe file located in the Windows CE for PCMCIA folder on
the Quatech COM CD.
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3. The setup program will copy the files to predetermined location, which can
be changed by the user. Click next to proceed.. Installation is now complete.
In the event that installation process took place with out having the Windows CE
device connected to the computer and the install program will prompt the user that
on the next on the next connection the device will complete the installation.
Choose ‘Yes’ on the following window and you installation is now complete.
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4 DOS / Windows 3.x Installation
Two configuration software programs are provided with the QSP-200/300: a Client Driver,
QSP200CL.SYS, and a card Enabler, QSP200EN.EXE. Both of these programs are executed
from DOS (before entering Windows) and allow operation of the QSP-200/300 in both the DOS
and Windows 3.x environments. For optimal operation, however, the Client Driver is the
preferred method of installation and configuration. The table below highlights the differences
between these programs.
Client Driver (recommended)
File name: QSP200CL.SYS
Enabler (not recommended)
File name: QSP200EN.EXE
File type: DOS device driver
File type: DOS executable
Interfaces to PCMCIA Card and Socket
Interfaces directly to Intel 82365SL and
Services software (PCMCIA host adapter other PCIC compatible PCMCIA host
independent)
adapters
Allows automatic configuration of
QSP-200/300 adapters upon insertion
(Hot Swapping)
Does not support automatic
configuration of QSP-200/300 adapters
upon insertion (Hot Swapping)
Requires PCMCIA Card and Socket
Services software
Does not require PCMCIA Card and
Socket Services software
Figure 2. Client Driver versus Enabler for DOS/Windows 3.x.
Card and Socket Services software is commercially available from several vendors for most
desktop and laptop PCs. If you are unsure whether Card and Socket Services software is
currently installed on your system, install the QSP-200/300 Client Driver as discussed in
following section. When loaded, the Client Driver will display an error message if Card and
Socket Services software is not detected.
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4.1 QSP-200/300 Client Driver for DOS
In order to use the QSP-200/300 Client Driver, the system must be configured with Card and
Socket Services software. Card and Socket Services software is not provided with the
QSP-200/300.
IMPORTANT:
Some versions of Card and Socket Services dated before 1993
do not support general purpose I/O cards. If after careful
installation of the Client Driver the QSP-200/300 does not
configure or operate properly, an updated version of Card and
Socket Services may be required.
4.1.1 Client Driver Installation
The following procedure is used to install the QSP-200/300 Client Driver:
1. Copy the file QSP200CL.SYS from the QSP-200/300 distribution CD onto the
system's hard drive.
2. Using an ASCII text editor, open the system's CONFIG.SYS file located in the root
directory of the boot drive.
3. Locate the line(s) in the CONFIG.SYS file where the Card and Socket Services
software is installed.
4. AFTER the line(s) installing the Card and Socket Services software, add the
following line to the CONFIG.SYS file:
DEVICE = drive:\path\QSP200CL.SYS
options
where options are the QSP-200/300 Client Driver command line options
discussed on the following pages.
5. Save the CONFIG.SYS file and exit the text editor.
6. Insert the QSP-200/300 into one of the system's PCMCIA slots.
NOTE: Since the QSP-200/300 Client Driver supports "Hot Swapping", it is not
necessary to have the QSP-200/300 installed when booting the system. By inserting
the card before booting, however, the Client Driver will report the adapter
configuration during the boot process thereby verifying the changes made to the
CONFIG.SYS.
7. Reboot the system and note the message displayed when the QSP-200/300 Client
Driver is loaded. If the Client Driver reports an "invalid command line option",
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correct the entry in the CONFIG.SYS file and reboot the system again. If the Client
Driver reports "Card and Socket Services not found", a version of Card and Socket
Services must be installed on the system or the QSP-200/300 Enabler program must
be used to configure the adapter. If the Client Driver reports the desired adapter
configuration, the installation process is complete and the QSP-200/300 may be
removed and / or inserted from the system as desired. On each insertion into the
PCMCIA socket, the QSP-200/300 will be automatically reconfigured according to
the command line options.
4.1.2 Command Line Options
The QSP-200/300 Client Driver accepts up to eight command line arguments from the user to
determine the configuration of the QSP-200/300. If any arguments are provided, the Client
Driver will attempt to configure any QSP-200/300s with the options specified in the order they
are entered on the command line. Each argument must be enclosed in parenthesis and must be
separated from other arguments by a space on the command line. Within each argument, any or
all of the following parameters may be specified using a comma (no spaces) to separate each
parameter:
Baddress specifies the base I/O address of the QSP-200/300 in hexadecimal and must reside
on an even 32-byte (20H) boundary. If this option is omitted, a base address will be
assigned by Card and Socket Services.
Iirq
specifies the interrupt level (IRQ) of the QSP-200/300 in decimal. irq must be one
of the following values: 3, 4, 5, 7, 9, 10, 11, 12, 14, 15, or 0 if no IRQ is desired. If
this option is omitted, an interrupt level will be assigned by Card and Socket
Services.
Ssocket
Omode
specifies which PCMCIA socket the QSP-200/300 must be inserted into for this
configuration argument to be used. socket must be in the range 0 - 15. If this option
is omitted, the configuration argument will apply to QSP-200/300s inserted into any
socket.
specifies RS-422/485 output driver mode. The QSP-200/300’s ports may be
configured for either full duplex or half duplex operation with this option. If this
option is omitted, the default setting is the RS-422/485 ports are configured for full
duplex operation with the RS-422/485 output drivers always enabled. In half duplex
mode, the RS-422/485 transmitter may be enabled and disabled via the RTS (request
to send) or DTR (data terminal ready) signals. Both RTS and DTR are controlled
through the Modem Control Register of the 16550. See the Hardware Information
section for more information.
Option
o0
Output Drivers
Always Enabled
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o1
o2
DTR Controlled
RTS Controlled
Figure 3. DOS Client Output Driver Options.
H
instructs the client driver to enable the RTS-CTS modem control handshake. When
modem control handshaking in enabled, the 16C550 UART’s RTS and CTS signals
are connected to the RS-422/485 auxiliary channel (AuxOut and AuxIn). The
auxiliary channel may then be used for handshaking between a DSP-200/300
RS-422/485 port and a peripheral device. When modem control handshaking is
disabled, the RTS and CTS signals from the 16C550 UART are looped back to each
other. If this option is omitted, the default setting is RTS-CTS modem control
handshake disabled. See the Hardware Information section for more information.
U
instructs the Client Driver to disable the QSP-200/300's interrupt status register and
enable the Scratchpad registers of the individual UARTs. This option is only
required in very rare cases where an application program requires access to the
UART's Scratchpad register. If this option is omitted, the QSP-200/300's interrupt
status register is enabled and the UARTs' Scratchpad registers are disabled.
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4.1.3 QSP-200/300 Client Driver Examples
Example 1
DEVICE = C:\QSP-200\QSP200CL.SYS
In example 1, no command line arguments are specified. The Client Driver will configure a
QSP-200/300 inserted into any socket with a base address and IRQ assigned by Card and Socket
Services. The output drivers will be configured for full duplex operation (always enabled), the
RTS-CTS handshaking will be disabled (loopback mode), and the interrupt status register will be
enabled.
Example 2
DEVICE = C:\QSP-200\QSP200CL.SYS (b300)
In example 2, a single command line argument is provided. The Client Driver will attempt to
configure a QSP-200/300 inserted into any socket with a base address of 300H and an IRQ
assigned by Card and Socket Services. If address 300H is unavailable, the QSP-200/300 will not
be configured. If the Client Driver can successfully configure the card, the output drivers will be
configured for full duplex operation (always enabled), the RTS-CTS handshaking will be
disabled (loopback mode), and the interrupt status register will be enabled.
Example 3
DEVICE = C:\QSP-200\QSP200CL.SYS (s0,b300,i5)
In example 3, a single command line argument is provided. The Client Driver will attempt to
configure a QSP-200/300 inserted into socket 0 with a base address of 300H and IRQ 5. If
address 300H or IRQ 5 is unavailable, the card will not be configured. In addition, if a
QSP-200/300 is inserted into any other socket, it will not be configured. If the Client Driver can
successfully configure the card, the output drivers will be configured for full duplex operation
(always enabled), the RTS-CTS handshaking will be disabled (loopback mode), and the interrupt
status register will be enabled.
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Example 4
DEVICE = C:\QSP-200\QSP200CL.SYS (i5,h,u,b300,o2)
In example 4, a single command line argument is provided. Because the parameter order is not
significant, the Client Driver will attempt to configure a QSP-200/300 inserted into any socket
with a base address of 300H and IRQ 5. If address 300H or IRQ 5 is unavailable, the card will
not be configured. If the Client Driver can successfully configure the card, the output drivers
will be configured for RTS controlled half duplex operation, the RTS-CTS handshaking will be
enabled, and the interrupt status register will be disabled (i.e. the UARTs' Scratchpad registers
will be enabled).
Example 5
DEVICE = C:\QSP-200\QSP200CL.SYS (b300,i5) (i10) ( )
In example 5, three command line arguments are provided. The Client Driver will first attempt
to configure a QSP-200/300 inserted into any socket with a base address of 300H and IRQ 5. If
address 300H or IRQ 5 is unavailable, the Client Driver will proceed to the second command line
argument and attempt to configure the card with a base address assigned by Card and Socket
Services and IRQ 10. If IRQ 10 is also unavailable, the Client Driver will proceed to the third
command line argument and attempt to configure the card with a base address and an IRQ
assigned by Card and Socket Services. If the Client Driver can successfully configure the card,
the output drivers will be configured for full duplex operation (always enabled), the RTS-CTS
handshaking will be disabled (loopback mode), and the interrupt status register will be enabled.
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Example 6
DEVICE = C:\QSP-200\QSP200CL.SYS (b300,i5) ( ) (i10)
In example 6, the three command line arguments of example 5 have been rearranged. The Client
Driver will first attempt to configure a QSP-200/300 inserted into any socket with a base address
of 300H and IRQ 5. If address 300H or IRQ 5 is unavailable, the Client Driver will proceed to
the second command line argument and attempt to configure the card with a base address and
IRQ assigned by Card and Socket Services. Since the second command line argument includes
all available address and IRQ resources, the third command line argument will never be reached
by the Client Driver. It is the user's responsibility to place the command line arguments in a
logical order.
Example 7
DEVICE = C:\QSP-200\QSP200CL.SYS (s0,b300,i5) (s1,b340,i10,o1)
The type of configuration shown in example 7 may be desirable in systems where more than one
QSP-200/300 is to be installed. In this example, the Client Driver will attempt to configure a
QSP-200/300 inserted into socket 0 with a base address of 300H and IRQ 5. If the card is
inserted into socket 1, the Client Driver will attempt to configure it with base address 340H and
IRQ 10. This allows the user to force the address and IRQ settings to be socket specific which
may simplify cable connections and software development. As in the previous examples,
however, if the requested address or interrupt resources are not available, the QSP-200/300 will
not be configured.
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4.1.4 Common Problems
Generic Client Drivers:
Many Card and Socket Services packages include a generic client driver (or "Super Client")
which configures standard I/O devices. If one of these generic client drivers is installed, it may
configure the QSP-200/300 causing the QSP-200/300 client driver to fail installation. In these
cases, the user should do one of the following:
1. modify the operation of the generic client driver to disable the configuration of
modem/serial port cards. Consult the Card and Socket Services documentation for
availability and details of this feature.
2. place the QSP-200/300 client driver before the generic client driver in the
CONFIG.SYS.
Available Resources:
One function of the Card and Socket Services software is to track which system resources
(memory addresses, I/O addresses, IRQs, etc.) are available for assignment to inserted PCMCIA
cards. Sometimes, however, the Card Services software assumes or incorrectly determines that a
particular resource is used when it is actually available. Most Card and Socket Services generate
a resource table in a file (typically in the form of an .INI file) which the user can modify to adjust
the available system resources. Consult the Card and Socket Services documentation for
availability and details of this feature.
Multiple Configuration Attempts:
Some Card and Socket Services have a setting which aborts the configuration process after a
single configuration failure (such as a request for an unavailable resource). The user should
change this setting to allow for multiple configuration attempts. Consult the Card and Socket
Services documentation for availability and details of this feature.
Older Versions of Card and Socket Services:
Some versions of Card and Socket Services dated before 1993 do not support general purpose
I/O cards. If after careful installation of the Client Driver the QSP-200/300 does not configure or
operate properly, an updated version of Card and Socket Services may be required. Card and
Socket Services software is available from Quatech Inc.
4.2 QSP-200/300 Enabler for DOS
For systems that are not operating PCMCIA Card and Socket Services software, the
QSP-200/300 DOS Enabler may be used to enable and configure the adapter. This Enabler,
QSP200EN.EXE, will operate on any DOS system using an Intel82365SL or PCIC compatible
PCMCIA host adapter including the Cirrus Logic CL-PD6710 / 6720, the VLSI VL82C146, and
the Vadem VG-365 among others.
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IMPORTANT:
In order to use the QSP-200/300 Enabler for DOS, the system
MUST NOT be configured with Card and Socket Services
software. If a Card and Socket Services software is installed, the
QSP-200/300 Enabler may interfere with its operation and with the
device(s) it controls.
The QSP-200/300 Enabler does not support automatic configuration of adapters upon insertion,
more commonly referred to as "Hot Swapping". This means the adapter must be installed in one
of the system's PCMCIA sockets before executing QSP200EN.EXE. If more than one adapter is
installed in a system, the Enabler must be executed separately for each adapter. Furthermore,
QSP200EN.EXE should be executed to release the resources used by the adapter before it is
removed from the PCMCIA socket. Since PCMCIA adapters do not retain their configuration
after removal, any adapter that is removed from the system must be reconfigured with the
Enabler after reinserting it into a PCMCIA socket.
IMPORTANT:
The Enabler requires a region of high DOS memory when configuring
a QSP-200/300. This region is 1000H bytes (4KB) long and by
default begins at address D0000H (the default address may be changed
using the "W" option). If a memory manager such asEMM386,
QEMM, or 386Max is installed on the system, this region of DOS
memory must be excluded from the memory manager's control.
Consult the documentation provided with the memory manager
software for instructions on how to exclude this memory region.
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4.2.1 Command Line Options
To configure a QSP-200/300 in the system, the Enabler requires one command line argument
from the user to determine the configuration of the card. This argument must be enclosed in
parenthesis and within the argument, any or all of the following parameters may be specified
using a comma (no spaces) to separate each parameter:
Ssocket
specifies which PCMCIA socket the QSP-200/300 must be inserted into for this
configuration argument to be used. socket must be in the range 0 - 15. This option is
always required.
Baddress specifies the base I/O address of the QSP-200/300 in hexadecimal and must reside
on an even 32-byte (20H) boundary. This option is required if the 'R' option is not
used.
Iirq
specifies the interrupt level (IRQ) of the QSP-200/300 in decimal. irq must be one
of the following values: 3, 4, 5, 7, 9, 10, 11, 12, 14, 15, or 0 if no IRQ is desired.
This option is required if the 'R' option is not used.
Waddress specifies the base address of the memory window required to configure the
QSP-200/300. Set address = D0 for a memory window at segment D000, address =
D8 for a memory window at segment D800, etc. Valid settings for address are C8,
CC, D0, D4, D8, and DC. If this option is omitted, a memory window at segment
D000 will be used.
Omode
specifies RS-422/485 output driver mode. The QSP-200/300’s ports may be
configured for either full duplex or half duplex operation with this option. If this
option is omitted, the default setting is the RS-422/485 ports are configured for full
duplex operation with the RS-422/485 output drivers always enabled. In half duplex
mode, the RS-422/485 transmitter may be enabled and disabled via the RTS (request
to send) or DTR (data terminal ready) signals. Both RTS and DTR are controlled
through the Modem Control Register of the 16550. See the Hardware Information
section for more information.
Option
o0
Output Drivers
Always Enabled
o1
DTR Controlled
o2
RTS Controlled
Figure 4. DOS Enabler Output Driver Options.
H
instructs the Enabler to enable the RTS-CTS modem control handshake. When
modem control handshaking in enabled, the 16C550 UART’s RTS and CTS signals
are connected to the RS-422/485 auxiliary channel (AuxOut and AuxIn). The
auxiliary channel may then be used for handshaking between a QSP-200/300
RS-422/485 port and a peripheral device. When modem control handshaking is
disabled, the RTS and CTS signals from the 16C550 UART are looped back to each
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other. If this option is omitted, the default setting is RTS-CTS modem control
handshake disabled. See the Hardware Information section for more information.
U
instructs the Enabler to disable the QSP-200/300's interrupt status register and enable
the Scratchpad registers of the individual UARTs. This option is only required in
very rare cases where an application program requires access to theUART's
Scratchpad register. If this option is omitted, the QSP-200/300's interrupt status
register is enabled and the UARTs' Scratchpad registers are disabled.
Before removing a QSP-200/300 from its PCMCIA socket, the Enabler should be executed to
free the system resources allocated when the card was installed. For this operation the Enabler
provides on additional command line option:
R
instructs the Enabler to release the resources previously allocated to the
QSP-200/300. When the 'R' option is used, any settings specified by the 'B', 'I', 'U',
and 'E' options are ignored. This option must be omitted when installing a
QSP-200/300 into the system.
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4.2.2 QSP-200/300 Enabler Examples
Example 1
QSP200EN.EXE
In example 1, no command line argument is specified. The Enabler will report an error and
display the proper usage of the command.
Example 2
QSP200EN.EXE (s0,b300,i5)
In example 2, the Enabler will configure the QSP-200/300 in socket 0 with a base address of
300H and IRQ 5 using a configuration memory window at segment D000. The output drivers
will be configured for full duplex operation (always enabled), the RTS-CTS handshaking will be
disabled (loopback mode), and the interrupt status register will be enabled.
Example 3
QSP200EN.EXE (i10,u,b340,s1,o1,h)
In example 3, the Enabler will configure the QSP-200/300 in socket 1 with a base address of
340H and IRQ 10 using a configuration memory window at segment D000. The output drivers
will be configured for DTR controlled half duplex operation, the RTS-CTS handshaking will be
enabled, and the UARTs' Scratchpad registers will be enabled (i.e. the interrupt status register
will be disabled). Note that the parameter order is not significant.
Example 4
QSP200EN.EXE (s0,b300,i3,wd8)
In example 4, the Enabler will configure the QSP-200/300 in socket 0 with a base address of
300H and IRQ 3 using a configuration memory window at segment D800. The output drivers
will be configured for full duplex operation (always enabled), the RTS-CTS handshaking will be
disabled (loopback mode), and the interrupt status register will be enabled.
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Example 5
QSP200EN.EXE (s0,b300,i5,r)
In example 5, the Enabler will release the configuration used by the QSP-200/300 in socket 0
using a configuration memory window at segment D000. The base address andIRQ parameters
are ignored and may be omitted.
Example 6
QSP200EN.EXE (s1,r,wcc)
In example 5, the Enabler will release the configuration used by the QSP-200/300 in socket 1
using a configuration memory window at segment CC00.
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4.2.3 Common Problems
Memory Range Exclusion:
The Enabler requires a region of high DOS memory when configuring a QSP-200/300. This
region is 1000H bytes (4KB) long and by default begins at address D0000H (the default address
may be changed using the "W" option). If a memory manager such asEMM386, QEMM, or
386Max is installed on the system, this region of DOS memory must be excluded from the
memory manager's control. Consult the documentation provided with the memory manager
software for instructions on how to exclude this memory region.
Furthermore, some systems use the high memory area for BIOS shadowing to improve overall
system performance. In order for the Enabler to operate, any BIOS shadowing must be disabled
in the address range specified for the configuration window. BIOS shadowing can usually be
disabled through the system's CMOS setup utility.
Contention with Other Devices:
Without Card and Socket Services support, the QSP-200/300 Enabler has no way to determine
the resources in use by other devices in the system. It is the user's responsibility to guarantee that
the parameters specified on the Enabler command line are available in the system and will not
cause a conflict.
Socket Numbers:
The Enabler requires the QSP-200/300's socket number to be specified on the command line and
the card must be inserted into the socket before the Enabler is invoked. Some vendors number
their sockets from 1 to N while other vendors number their sockets from 0 to N-1. For the
QSP-200/300 Enabler, the lowest socket number in the system is designated socket 0.
Card and Socket Services Software:
In order to use the QSP-200/300 Enabler for DOS, the system MUST NOT be configured with
Card and Socket Services software. If a Card and Socket Services software is installed, the
QSP-200/300 Enabler may interfere with its operation and with the device(s) it controls. For
systems configured with Card and Socket Services, the QSP-200/300 Client Driver is the
recommended method of configuration.
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5 OS/2 Installation
In order to use the QSP-200/300 Client Driver for OS/2, the system must be configured as
follows:
1. The system must be running OS/2 2.1 or later.
2. OS/2 PCMCIA Card and Socket Services support must be installed. If PCMCIA
support was not selected when OS/2 was installed, it can be added using the Selective
Install facility in the System Setup folder. On OS/2 2.1 and 2.11, Socket Services
must be added separately. The necessary files can be found onCompuserve in the
OS2SUPPORT forum and may be available elsewhere. These files are not available
from Quatech Inc.
3. Quatech's OS/2 serial port device driver, "QCOM" version 2.01 or later, must be
installed. The QSP-200/300 will not operate with the standard OS/2 serial port device
drivers. Quatech Inc. can not guarantee the operation of the QSP-200/300 with any
other third party device drivers for OS/2.
4. There must be at least 32 bytes of available I/O space and 1 availableIRQ.
After the system has been configured to the above specifications, the QSP-200/300 Client Driver
may be installed with the following procedure:
1. Copy the QSP200.SYS client driver file from the Quatech COM CD to any
convenient directory on the hard disk.
2. Open the CONFIG.SYS file using any ASCII text editor.
3. Add the following line to the CONFIG.SYS file:
DEVICE =
drive:\path\QSP200.SYS options
where options are the QSP-200/300 OS/2 Client
Driver command line options discussed in the following sections.
4. Save the CONFIG.SYS file, exit the text editor, shutdown the system, and reboot to
activate the changes.
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5.1 Command Line Options
The QSP-200/300 Client Driver for OS/2 supports two methods of configuration: using "system
assigned" resources and using "user assigned" resources. Both options provide fullPCMCIA
compliance and functionality (including "Hot-swapping") but each has some advantages and
disadvantages as discussed in the following sections.
5.1.1 Configuring With "System Assigned" Resources
Allowing the OS/2 Plug-and-Play system to assign the hardware resources to the QSP-200/300 is
the ideal choice when only OS/2 programs will access the serial ports. When configuring the
hardware, the user simply specifies a list of COM port numbers. When a QSP-200/300 is
inserted into a PCMCIA socket, the client driver will configure the card as a series of COM
ports, starting with the lowest available port number in the list.
Configuring a QSP-200/300 with system assigned resources can be a problem, however, if DOS
and/or Windows applications will be accessing the serial ports. This is because most DOS
applications write directly to the communications hardware and the Windows' Control Panel also
wants to know the hardware configuration of the serial ports. In these cases, the user may want
to configure the QSP-200/300 with "user assigned" resources.
Example 1
DEVICE=C:\QSP-200\QSP200.SYS COM3
In example 1, the Client Driver will attempt to configure the QSP-200/300 as COM3 through
COM6. If COM3, 4, 5, or 6 already exists in the system, the QSP-200/300 will not be
configured. Furthermore, only one QSP-200/300 can be installed in this system.
Example 2
DEVICE=C:\QSP-200\QSP200.SYS COM7 COM3
In example 2, the Client Driver will attempt to configure the QSP-200/300 as COM3 through
COM6. If COM3, 4, 5, or 6 already exists in the system, the Client Driver will attempt to
configure the QSP-200/300 as COM7 through COM10. If COM7, 8, 9, or 10 already exist in the
system, the QSP-200/300 will not be configured. Up to two QSP-200/300s can be installed in
this system.
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5.1.2 Configuring With "User Assigned" Resources
As mentioned in the previous section, allowing the OS/2 Plug-and-Play system to assign the
hardware resources to the QSP-200/300 is ideal for OS/2 programs but can be a problem if DOS
and/or Windows applications will be accessing the serial ports. This is because most DOS
applications write directly to the communications hardware and the Windows' Control Panel also
wants to know the hardware configuration of the serial ports. For this reason, the QSP-200/300
Client Driver allows the user to request specific hardware settings using a series of command line
arguments of the form
(port,address,irq)
port
specifies the beginning COM port number
address specifies the base I/O address of the QSP-200/300 in hexadecimal and must reside
on an even 32-byte (20H) boundary.
irq
specifies the interrupt level (IRQ) of the QSP-200/300 in decimal. irq must be one
of the following values: 3, 4, 5, 7, 9, 10, 11, 12, 14, or 15.
Each argument must be enclosed in parentheses and must be separated from other arguments by a
space on the command line. Within each argument, the parameters must be separated using a
comma (no spaces).
When a QSP-200/300 is inserted into a PCMCIA socket, the client driver will configure the card
as a series of COM ports, starting with the lowest available port number in the list.
IMPORTANT:
If the user specified resources are in-use by other devices in the
system, the QSP-200/300 will not be configured.
Example 1
DEVICE=C:\QSP-200\QSP200.SYS (3,100,5)
In example 1, the Client Driver will attempt to configure the QSP-200/300 as COM3 through
COM6 using I/O addresses 100-11F hex and IRQ 5. If COM3, 4, 5, or 6 already exists, or if the
I/O address or IRQ resources are already in use, the QSP-200/300 will not be configured.
Furthermore, only one QSP-200/300 can be installed in this system.
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Example 2
DEVICE=C:\QSP-200\QSP200.SYS (7,120,15) (3,300,4)
In example 2, the Client Driver will attempt to configure the QSP-200/300 as COM3 through
COM6 using I/O address 300-31F hex and IRQ 4. If COM3, 4, 5, or 6 already exists, or if the
I/O address or IRQ resources are already in use, the Client Driver will attempt to configure the
QSP-200/300 as COM7 through COM10 using I/O address 120-13F hex and IRQ 15. If COM7,
8, 9, or 10 already exists or if the I/O address or IRQ resources are already in use, the
QSP-200/300 will not be configured. Up to two QSP-200/300s can be installed in this system.
5.1.3 Advanced Configuration Topics
For some applications, it may be desirable to specify the resources for one QSP-200/300 while
allowing the OS/2 Plug-and-Play system to assign the hardware resources for any additional
cards. This can be accomplished by mixing the configuration methods on the QSP-200/300
Client Driver command line
DEVICE=C:\QSP-200\QSP200.SYS (3,100,5) COM7
It is important to remember that when a QSP-200/300 is inserted into a PCMCIA socket, the
client driver will configure the card as a series of COM ports, starting with the lowest available
port number in the list.
Another common application requirement is to have a QSP-200/300 inserted into socket 1 be
configured as COM3 through COM6 while a QSP-200/300 inserted into socket 2 be configured
as COM7 through COM10. This type of configuration is supported by appending a "=Sx"
parameter after any command line argument.
DEVICE=C:\QSP-200\QSP200.SYS COM3=S1 COM7=S2
DEVICE=C:\QSP-200\QSP200.SYS (3,100,4)=S1 (7,300,3)=S2
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5.2 Monitoring The Status Of PCMCIA Cards
OS/2 Warp provides a utility called "Plug and Play for PCMCIA" that can be used to monitor the
status of each PCMCIA socket. In OS/2 2.1, this utility is called "Configuration Manager".
When a QSP-200/300 is inserted, the Card Type for the appropriate socket will display
"Multi-Function". If the card is successfully configured, the Card Status will display "Ready". If
the card cannot be configured, the Card Status will be "Not Ready". You can view the
resources claimed by a configured card by double-clicking on that card's line in the window.
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5.3 Common Problems
Invalid I/O Address When Using OS/2 2.1:
PCMCIA Card Services for OS/2 2.1 sometimes fails to supply a valid I/O address when using
"system assigned" resources. Use the "Configuration Manager" program to examine the I/O
address range assigned to the QSP-200/300. If this range does not begin on an even 32 byte
(20H) boundary, the QSP-200/300 will have to be installed using "user assigned" resources to
force a valid configuration.
There have not been any reports of this problem with OS/2 Warp.
Resources Not Available:
When using "user assigned" resources, it is the user's responsibility to ensure the I/O address and
IRQ resources are available. For OS/2 Warp users, the RMVIEW utility may be useful in finding
resource conflicts. Type "rmview /?" at an OS/2 command prompt for details.
When using "system assigned" resources, if the user knows the port number is available then the
system may not have sufficient resources available to configure the QSP-200/300. Again, the
RMVIEW utility provided with OS/2 Warp may be useful in determining the problem.
Regardless of the configuration method, each command line argument specifies the first of four
COM ports for the QSP-200/300. If any of these COM ports are already installed, the Client
Driver will not load.
Parameter Overlapping:
When installing the QSP-200/300, each command line argument specifies the first of four COM
ports. If these arguments overlap, the Client Driver will not load. For example, it is illegal to
specify QSP200.SYS COM3 COM4 because the first argument requests COM3 - COM6 and the
second argument specifies COM4 - COM7.
Insufficient Number Of Command Line Arguments:
The QSP-200/300 command line must contain at least one command line argument for each
QSP-200/300 to be installed.
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6 Hardware Information
6.1 Port Addressing
The QSP-200/300's four asynchronous serial ports are implemented using 4 standard 16C550
UARTs. Each of these UARTs requires 8 bytes of I/O space and when enabled which requires
the QSP-200/300 to be located on an even 32-byte (20H) boundary (e.g. 300H, 320H, 340H,
etc.).
QSP-200/300 channel
Channel A
Address assignment
Base Address + 0
Base Address + 8
Base Address + 16
Base Address + 24
Channel B
Channel C
Channel D
6.2 Scratchpad / Interrupt Status Register
Each 16C550 UART contains 8 I/O registers. The last of these registers, located at (Base address
+ 7), is referred to as the 'Scratchpad Register' and provides no functionality to theUART. In
place of this Scratchpad Register, the QSP-200/300 implements an interrupt status register which
can be accessed at (Base address + 7) of anyUART. The purpose of the interrupt status register
is to give the software programmer an easy way to inspect the interrupt state of the entire
QSP-200/300 with a single input operation. The format of the interrupt status register is shown
below:
D7
0
D6
0
D5
0
D4
0
D3
D2
D1
D0
Intr D Intr C Intr B Intr A
When one or more UARTs have interrupts pending, the associated bit(s) in the interrupt status
register are set to logic 1. When all the pending interrupts have been serviced for a specific
UART, its interrupt status bit will be cleared to logic 0 automatically. When all the pending
interrupts from all UARTs have been serviced, the entire interrupt status register will return logic
0. The application program should not exit its interrupt service routine until all pending
interrupts from all channels have been serviced (interrupt status register = 0) or no additional
interrupts will be received.
If an application requires the UARTs' Scratchpad Registers, the interrupt status register can be
disabled. Disabling the interrupt status register is supported by the QSP-200/300 configuration
software, which is operating system dependent. Refer to the relevant operating system
installation section for specific usage of this feature.
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6.3 Auxiliary Channel Configuration
An auxiliary channel is provided which allows for handshaking between a QSP-200/300
RS-422/485 port and a peripheral device. This auxiliary channel may be configured in one of
two ways:
; RTS-CTS handshake enabled.
; handshaking is disabled.
All ports must be configured in the same manner.
6.3.1 Auxiliary Channel: RTS-CTS Handshaking
The RTS-CTS handshake may be enabled so that RTS (Request To Send) is the auxiliary output
signal on AuxOut+ and AuxOut- (pins 1 and 6 of the D9 female connector). Similarly, CTS
(Clear To Send) is the auxiliary input signal on AuxIn+ and AuxIn- (pins 5 and 9 of the D9
female connector). This configuration is shown below.
RS-422/485
Drivers/Receivers
16C550
UART
DATA OUT
+
Driver
TXD
-
DATA IN
AUX OUT
AUX IN
+
-
Receiver
Driver
RXD
-RTS
+
-
+
-
Receiver
-CTS
Figure 5. Auxiliary Channel RTS-CTS Handshaking.
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6.3.2 Auxiliary Channel: Handshaking Disabled
The QSP-200/300 ports may be configured so that the RTS-CTS handshake is disabled. This is
the default configuration. In this configuration, RTS and CTS from the 16C550 UART will be
looped back to each other. In addition, the auxiliary output and input signals will be looped back
to each other. This configuration is shown below:
RS-422/485
Drivers/Receivers
16C550
UART
DATA OUT
+
TXD
Driver
-
DATA IN
AUX OUT
AUX IN
+
-
RXD
-RTS
Receiver
Driver
+
-
+
-
-CTS
Receiver
Figure 6. Auxiliary Channel Handshaking Disabled
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6.4 Termination Resistors
No termination resistors are provided on the QSP-200/300 ports. Both output and input signals
are connected only to the external connector. Any termination which is required must be added
externally.
RS-422/485 Receiver
RXD+
RXD-
+
-
Rt
Rt
RS-422/485 Receiver
+
AUXIN+
AUXIN-
-
Recommended Termination Resistor Values
RS-422
RS-485
100 ohm 1/2W resistor
60 ohms total resistance
(120 ohms at each end)
Figure 7. RS-422/485 Termination
6.5 2-Wire Operation
The QSP-200/300’s ports may be configured for either full duplex or half duplex operation. By
default, the RS-422/485 ports are configured for full duplex operation with the RS-422/485
output drivers always enabled.
In half duplex mode, the RS-422/485 transmitter may be enabled and disabled via the RTS
(request to send) or DTR (data terminal ready) signals. Both RTS and DTR are controlled
through the Modem Control Register of the 16550.
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3 Options:
Data Out
Half Duplex
+
-
RS-422/485
Driver
-RTS
-DTR
Active Low
Output Enable
MUX
16C550
Aux Out
+
-
Full Duplex
RS-422/485
Driver
One of these three options must be selected via
software configuration. Full duplex operation is
the default mode.
NOTE:
Figure 8. RS-422/485 Driver Enable Options
If RTS is selected as the signal to enable the output drivers, setting 'bit 1' of the Modem Control
Register (to logic '1') will enable the output drivers and clearing 'bit 1' of the Modem Control
Register (to logic '0') will force the outputs into a high impedance state.
Similarly, if DTR is chosen as the signal to enable the output drivers setting 'bit 0' of the Modem
Control Register (to logic '1') will enable the output drivers and clearing 'bit 0' of the Modem
Control Register (to logic '0') will force the outputs into a high impedance state.
Selection of half duplex mode operation is dependent upon the configuration software and/or the
operating system used. Each of these,
however, ultimately control the half duplex mode by accessing the PCMCIA Configuration
Register on the QSP-200/300.
CAUTION:
When operating in half duplex mode, the transmitter output drivers
must be disabled before receiving and information. Failure to do so
will result in two output drivers being connected together which
may cause damage to the adapter, the computer, and/or the
peripheral equipment.
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7 External Connections
An adapter cable is included with the QSP-200/300 to convert the PCMCIA output connector
into 4 standard D-9 female RS-232 connectors as shown in the figure below.
Port A
Port B
Port C
Port D
Figure 10. QSP-200/300 adapter cable to standard female D-9 connectors.
AuxIn+
RxD+
5
4
3
2
1
9
8
7
6
AuxIn-
RxD-
Gnd
TxD-
TxD+
AuxOut-
AuxOut+
Figure 11. D-9 female RS-422/485 connector signal assignment.
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8 Specifications
Bus Interface
PCMCIA
PC Card Standard 2.1 compliant
Physical Dimensions
Maximum Baud Rate
Power Requirements
Type II PCMCIA card (5mm)
120K
+5 volts
35.85 mA (typical)
45.87 mA (maximum)
Connector
Adapter to 4 standard female D-9
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QSP-200/300
User's Manual
Version 1.32
March 2004
Part No. 940-0151-132
QSP-200/300 User's Manual
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