Windows 3.x/MS-DOS Installation 4-57
The driver loaded, but my DOS modem
software won’t work
The PRO/100 PC Card is configured to add a second interrupt and I/O
address window in order to emulate a standard serial port interface. Use
the COMx keyword in your driver configuration file or as a command line
parameter to enable serial port emulation. If no COMx keyword is used,
the Intel driver will configure the PRO/100 PC Card at the first available
COM port.
Pre-set default resources corresponding to the COM port value are used,
as follows:
PORT IRQ IOADDRESS
COM1 4 03F8
COM2 3 02F8
COM3 4 03E8
COM4 3 02E8
The default setting for the COM port address can be changed by the
COMBASE keyword. The default setting for the IRQ can be changed by
the COMIRQ keyword. A second keyword that affects interrupt usage is
SHAREIRQ. The SHAREIRQ keyword forces the modem side to share
the interrupt that the network side is using. The INT or INTERRUPT
keyword is used to set the interrupt the network side uses. Card and
Socket Services also has an effect on interrupt usage.
To troubleshoot the issues described above, proceed as follows:
1 Verify that the phone line is an analog phone line (the type used
with other modems and fax machines). Connecting the PRO/100
PC Card to a digital phone line will not damage the adapter, but is
not recommended.
2 Verify that the COMx keyword is present in the driver configuration
file or as a command line parameter as appropriate.
3 Observe the COM port number stated when the driver loads. It
should match the value of x assigned to the COMx keyword
(decimal values or 1, 2, 3, or 4) in the driver configuration file
(NET.CFG for M16BODI, PROTOCOL.INI for M16BNDIS) or
as a command line parameter for the packet driver (M16BPD) or
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