Installation
Page 7
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The EXM-31 consumes a contiguous eight byte region of I/O space. Some suggested
address ranges are given below:
Address
Hex Value OB2
Value
3F8-3FF
7F
FF
2F8-2FF
5F
DF
3E8-3EF 7D
FD
2E8-2EF 5D
DD
2A0-2A7 54
D4
2B0-2B7 56
D6
It is suggested that the address range of 000 - 107 not be used as the base address
due to possible conflicts while configuring other EXMs or AT peripherals in the
system. Some other common base I/O address ranges to avoid are the following:
1F0-1FF
IDE
disk
controller
278-27F
Parallel
port
(LPT2)
378-37F
Parallel
port
(LPT1)
3F0-3F7
Floppy
disk
controller
For example, a typical OB2 setting would be
DD
, setting the modem to use base
address 2E8-2EF.