Ardent Tool of Capitalism

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FDDI Single Ring Adapter (Type 2-6)

8ef4m.xx.xx
Crossover Cable
Wrap Plug 92F9003

FDDI Single Ring Adapter 81F8981?

2-R looks OEM-ish, 2-6 screams heavy-handed IBM.

? FDDI xcvr
P2 Connector to DAS
U4 AM79C81AGC/10
U5 AM79C82AGC
U? 17x MT5C2564DJ-35
U14 MCA Bus Interface [81F8516ESD?]
U15 AM79C83GC

U? AM7984AJC/20 (under heatsink?)
U51 AM7985AJC/10
U28 81F8988
U22 81F8987
U31 Blue 91F1059
U37 75.0000 MHz osc
U? PLCC68 33G5456 / D12063FN

The DIP in the lower left corner is P/N 31G9394, the white sticker to lower left of the blue chip says 31G9393.

Note: Some chips may be off a little.

AM7984AJC FDDI Encoder Decoder (ENDEC)
AM7985AJC FDDI ENDEC Data Separator (EDS)
AM79C81AGC CMOS RAM Buffer Controller (RBC)
AM79C82AGC Data Path Controller (DPC)
AM79C83GC FORMAC (AM79C830 FORMAC Plus)

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Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 14 Apr 2024 - Changelog | About | Legal & Contact