On 2021-07-11 4:37 a.m., Classic CMP via cctalk wrote:
(2) A dual width SBUS framebuffer, with space for a piggyback daughter
SBUS card in the middle. It features 3 x Bt457 RAMDACs and an Actel
A1020A chip.
Possibly part of the "SPARC Card TV" partially described here:
http://www.hyperstation.de/SBus-Framebuffer/SPARC_Card_TV/sparc_card_tv.html
You seem to be missing the upper board, though.
(4) Possible Serial card with a DB9 connector,
although there?s WAY too
much logic for a simple serial card. Has a jumper for 4Mhz / 16Mhz
which hints at maybe something Token-ring?
Most likely Sun's "TRI/S" token ring interface, 501-1932.
https://shrubbery.net/~heas/sun-feh-2_1/Devices/Communication/COMM_TRI_S.ht…
(5) A SBUS card with S-Video and what I assume to be
composite. Looks
like a 501-3019 on first inspection but there?s less logic and no
heatsink on board.
Probably the earlier Sun VideoPix (501-1706) in that case.
https://shrubbery.net/~heas/sun-feh-2_1/Devices/Graphics/GRAPH_VideoPix.html