A ROM emulator for the 71B

[mfleming]

That's correct! As long as you follow the placement rules any of those combinations would be correct. I believe I have all of the .BIN ROM images listed in your Compendium, but if you know of others, I can generate image files for them as well.

Enumerating multiple ROMs is pretty unlikely due to timing constraints, but it's not completely out of question with clever enough coding I suppose. The reason is that ROMs compare a given PC or DP address with their own address range in parallel while of course the emulator must do so in sequence which chews up quite a few precious instruction cycles. Things would be completely different if only the 71 CPU presented an address high nibble first.

As I mentioned earlier, with the proper placement constraints I'm hoping I can also support a hard configured ROM. That to me would be the last major feature to add - all else being frosting and candles.

~Mark