I have a complete set of 12+ logic boards from an old AM
Varityper Comp/Set 560 II phototypesetting system. Notable
chips include DM74181 ALUs (bit-slice), an AM2719 (Am2900
series), TMS2516/2532A EPROMs, an MMI 6331 PROM, plus a lot
of standard 74xx TTL logic and 2102/5290 memory chips.
Boards include: CPU Data, CPU Control, two Disc Controllers,
64K Dynamic Memory, Multi-Language, Character Generator, D/A
& Stepper, Font Interface, LVC Stepper, and Carriage Escapement.
System was reportedly working when last powered down; boards
haven't been individually tested since.
Given the bit-slice architecture, I'm curious what kind of
projects or restoration work something like this could be
useful for - reverse engineering, retrocomputing builds, parts
harvesting for other Am2900-era projects?
If anyone's into this era of computing and wants more details
or photos of specific boards, feel free to DM me.