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Windows 3.x/MS-DOS Installation 4-35
Changing Interrupt or I/O Address Settings
The COMIRQ keyword is used to override the predefined interrupt value
for a specific COM port in case of a conflict between LAN and modem
settings. It can also be used with COMBASE to select a user-defined
COM port. Default is keyword not used. Setting is a decimal value which
must be different from the value used with the INTERRUPT keyword.
The COMBASE keyword can be used to override the predefined I/O
port value for a specific COM port in case of a conflict between LAN and
modem settings. It can also be used with COMIRQ to select a user-
defined COM port. The default condition is keyword not used.
Parameter setting is a hexadecimal value in the range 248 to 3F8 which
must be different from the value used with the IOADDRESS or PORT
keyword. Serial emulation mode requires 8 addresses.
The SHAREIRQ keyword is only valid when no Card Services are being
used. It instructs the driver that the modem and LAN interfaces must
share the IRQ line. State this keyword to configure the interface for one
physical IRQ and one logical IRQ, instead of the two separate physical
IRQs normally used by the PC Card controller.
Preventing Memory Conflicts
Memory allocation conflicts can cause the Intel driver to fail to load. The
PRO/100 PC Card requires an 8K memory block located between C000
and EFFF, with a default starting address of D2000.
Some computers require that a different address be used. To change the
memory address at which the Intel driver loads, use the MEMORY or
MEM keyword in the driver configuration file or on the driver command
line.
Memory Manager Exclusions
When using a memory manager such as EMM386, the memory manager
will try to control the upper memory blocks where the Intel driver
normally loads. To prevent conflicts, add a statement to the EMM386
command line excluding an 8K memory block between C000 and EFFF
for the Intel driver. For example,
DEVICE=C:\PATH\EMM386.EXE NOEMS X=CC00-CDFF