IBM 09-0572-000 - Manual (Page 79)

B-4 A PPENDIX B: S PECIFICATIONS
Ring Speed
The 3C619C adapter operates at either 4- or 16-Mbps ring
speed. The adapter ring speed must match the speed of the
token ring network. The default is 16 Mbps.
I/O Base Address
In IBM mode when only one adapter is installed, it is
designated the Primary adapter. The Primary/Alternate
option can be changed with the Configuration and
Diagnostic Program. The base address allowed in IBM mode
is A20h or A24h. The default is A20h.
In 3Com mode the adapters are designated by their I/O base
addresses. The I/O base addresses allowed in 3Com mode are
as follows, with the default in bold:
If a system resource conflict exists, you may have to change
the settings of other adapters or options that are in your PC.
A20h 260h 2E0h 370h
A24h 270h 300h 380h
200h 280h 310h 390h
210h 290h 320h 3A0h
220h 2A0h 330h 3B0h
230h 2B0h 340h 3C0h
240h 2C0h 350h 3D0h
250h 2D0h 360h 3E0h