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Token-Ring Network Adapter/A

@E000.ADF IBM Token-Ring Network Adapter (ver. 1.10)
@E000.ADF IBM Token-Ring Network Adapter (ver. 1.00, less RAM choices, different fixed resources)
@E000.DGS Diagnostics

187-076 IBM Token-Ring Network Adapter/A
190-004 IBM Token-Ring Network PS/2 Model P70 386 Adapter/A (39F9598) (summary only)

bk8r1001.boo LAN Tech Ref Token-Ring Network Shared-RAM Adapters, SC30-3588-01
bk8r1000.boo Token-Ring Network Adapter Interface Ver 1, Release 1.0, SC30-3588-00
bk8p7001.boo LAN Tech Ref: 802.2 and NetBIOS APIs, SC30-3587-01
96X5767 IBM Token-Ring Network Trace and Performance Program User's Guide 1st Ed (Dec 1987)

Long Token-Ring Adapter
Short Token-Ring Adapter
ROM Images
Known Problems

Long Token-Ring Adapter (4Mbs) P/N 83X7488(A)

There are no visible part IDs on the board. The IDs shown here are completely made up.

U7,8 83X7485 / 83X7486 µcode ROMs, soldered in!

U9,10 M5M5165P-70, CXK5864AP-70 or compatible 8Kx8 SRAM

U12 69X8351 ID ROM? - 82S131N (alt) or compatible 512x4 PROM?

The jumper-like "shunts" are able to be removed from the pins. Purpose unknown. (possibly testing/debugging?)

Short Token-Ring Adapter (4Mbs) FRU P/N 25F7540 |

ZM5,7 M5M5179P-55 or compatible 8Kx9 SRAM

ZM8 15F9875 ID ROM? - 82S131N (alt) or compatible 512x4 PROM?

ROM Images

Short Adapter

All µcode ROMs are 32Kx8 (ZM9 / ZM10).

25F9158 / 25F9157 - © IBM CORP. 1988
93F0196 / 93F0197 - © IBM CORP. 1988, 1991

Known Problems

PS/2 Adapter Installation Restrictions 3270, Token Ring, Etc. (H005662)