docs or software for Quay 900 (uses Quay 90F/MPS board)

Eric Smith spacewar at
Sun Aug 16 02:14:19 CDT 2015

I just realized that the toggling of pin 14 is thanks to the feature
of the uPD765/8272 that automatically polls all four drives. I mostly
have worked with WD controllers which don't do that.

So I still don't know why the TWOSIDED/ signal isn't being reflected
in ST3. I'll have to trace out how it's wired on the board.

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