User`s manual
2.5 Optional Features
The device driver supports some optional features. These features are enabled by adding
an option switch to the QCOM.SYS command line. The option switch may be placed anywhere
on the line outside of parameter groups in parentheses, and it affects all serial ports.
Example: DEVICE=d:\os2\qcom.sys (QSC-100,4) /L /B /D /FT
2.5.1 Installed port listing ("/L")
This option causes the QCOM.SYS device driver to print a list of the serial ports it has
installed during boot time. The COM port name, base address, IRQ and detected UART type are
listed. If the serial port resides on a Quatech multiport serial adapter, the bus type and adapter
name are shown as well. PCMCIA serial ports are not listed.
For PCI adapters, the address and IRQ values shown are those assigned by the PCI BIOS.
For all other adapters, the values shown are those supplied by the user on the QCOM.SYS
command line. This display can be used to reveal the configuration of PCI adapters and to verify
which serial ports the device driver is actually controlling.
The device driver pauses five seconds after completing the display to allow the user time
to read the information listed.
2.5.2 Assert Break on Init ("/B")
This option causes the QCOM.SYS device driver to momentarily (ΒΌ second) assert and
then deassert a serial BREAK condition and the RTS and DTR signals on each port during
initialization. This can sometimes be helpful in resetting external devices that are in an
indeterminate state at boot time.
2.5.3 Create Boot Log File ("/D")
This option causes the QCOM.SYS device driver to create a file named QCOM.LOG in
the root directory of the boot drive. This file will contain a copy of each message displayed by
the driver during its boot-time initialization. The driver uses ANSI escape sequences to generate
the different colors used in some boot messages (errors and warnings are red, for example).
These ANSI escape sequences will appear as "junk" if this file is viewed with a text editor. To
view the file clearly, use the TYPE command at an OS/2 command prompt. (Example:
C:>TYPE QCOM.LOG)
The /D option automatically activates the /L option.
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