Making adaptors and dumping the contents of PROMs for the Quantel DPB-7000 Paintbox MAME project. @TheMogMinerpic.twitter.com/eRdlKsevYv
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Depends on the board. For example, there's an entire card called the "Store Address Card", which has various registers including ones for the cursor X and Y positions. Rather than being directly mapped, the cursor X value is run through a bank of PROMs.
Ultimately the purpose of MAME is to serve as hardware documentation, and to an extent a way of helping people with bit-rotted ROMs burn new ones, so I'm trying to go as low-level as I can with the Paintbox, short of just chucking the entire thing into MAME's netlist system.
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I have to give props to @DextersLab2013 here, because it's shockingly refreshing to be working with a collector of rare hardware who falls squarely on the preservationist side of the "share" vs. "hoard" dividing line.
Kiitos. Käytämme tätä aikajanasi parantamiseen. KumoaKumoa
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Interesting! So you'd actually be emulating the individual discrete logic parts here, not just a black box of the board function? (I'm assuming that apart from all those counters, you could replace chunks of this with some sort of truth table, however big)
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Thus far I'm not going as far as emulating the individual discrete logic parts, but I am emulating the exact functionality as best I can, and documenting which part location each bit of the functionality comes from.
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