Yeah, that's what we're seeing in that screenshot. Rather than emulate the Combiner Card just yet, I'm simply chucking the monitor window, Frame Store I contents, and Frame Store II contents on-screen side-by-side, for debugging purposes.
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It uses a string of 163 counters and some small PROMs to generate the blanking and other timings. I think this part can free-wheel, but it can also lock onto external sync, ofc. Did we have those PROMs dumped already,
@DextersTechLab ?pic.twitter.com/1d7f7W9fut
We do indeed. We have dumps of all the PROMs, all the PALs, and all the EPROMs in a full-up DPB-7000/1 system. Including the keyboard and tablet, and the box to which they both connect. :)
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Nice. :) Can't wait to turn fold your code into a Verilog version. lol
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This is really making me want to dig out the CPU42 board and try to make it boot... I wanted to port BSD to it, but the I/O map (IIRC) isn't fully known.
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