Reply 20 of 20, by rasz_pl
rasz_pl
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l33t
Since OP has both cards a test would be in order between sdram/sgram.
https://github.com/raszpl/sigrok-disk FM/MFM/RLL decoder
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module (AT&T Globalyst)
https://github.com/raszpl/386RC-16 ram board
https://github.com/raszpl/440BX Reference Design adapted to Kicad