User's Manual

Windows 3.x/MS-DOS Installation 4-51
The selected COM port already exists
The COM port is already in use by another device. Assign a different I/O
port for the COM port.
Windows 3.x Troubleshooting
Important
For application notes covering installation and configuration
issues pertaining to specific computers, Card and Socket
Services, and communications software packages, see Chapter 5.
Utilities and Applications.
A driver failed to load, and I’m using Card
and Socket Services
Card and Socket Services are a set of drivers designed to support the PC
Card (PCMCIA) standard. These drivers are generally supplied by the
computer manufacturer. Among other functions they
••
••
• Hide the PCMCIA socket hardware implementation from the PRO/
100 PC Card driver.
••
••
• Control the allocation of resources (memory windows, I/O ports,
interrupts) to the PRO/100 PC Card.
Recommendations for Use of Card and Socket Ser-
vices with the PRO/100 PC Card.
A. If the memory manager EMM386.EXE is being used, verify that the
memory required for the PRO/100 PC Card has been excluded from use
by the memory manager in the CONFIG.SYS. The memory exclusion
required when using Card and Socket Services is generally larger than the
exclusion needed by the
PRO/100 PC Card alone. The safest setting when troubleshooting is to
remark out the entire C and D memory ranges, as follows:
DEVICE=C:\PATH\EMM386.EXE NOEMS X=C000-DFFF