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A ROM emulator for the 71B
11-09-2020, 01:08 AM
Post: #26
RE: A ROM emulator for the 71B
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

Remember kids, "In a democracy, you get the government you deserve."
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Messages In This Thread
A ROM emulator for the 71B - mfleming - 11-06-2020, 08:52 PM
RE: A ROM emulator for the 71B - rprosperi - 11-06-2020, 09:58 PM
RE: A ROM emulator for the 71B - KimH - 11-07-2020, 03:49 PM
RE: A ROM emulator for the 71B - KimH - 11-07-2020, 05:18 PM
RE: A ROM emulator for the 71B - rprosperi - 11-07-2020, 07:19 PM
RE: A ROM emulator for the 71B - mfleming - 11-06-2020, 10:57 PM
RE: A ROM emulator for the 71B - twoweims - 11-07-2020, 01:52 AM
RE: A ROM emulator for the 71B - KimH - 11-07-2020, 03:52 PM
RE: A ROM emulator for the 71B - cdmackay - 11-07-2020, 12:45 AM
RE: A ROM emulator for the 71B - mfleming - 11-07-2020, 03:35 AM
RE: A ROM emulator for the 71B - rprosperi - 11-07-2020, 04:06 AM
RE: A ROM emulator for the 71B - mfleming - 11-07-2020, 07:07 PM
RE: A ROM emulator for the 71B - Sukiari - 11-08-2020, 12:07 AM
RE: A ROM emulator for the 71B - Harald - 11-08-2020, 12:06 PM
RE: A ROM emulator for the 71B - mfleming - 11-08-2020, 08:38 PM
RE: A ROM emulator for the 71B - EmmanuelC - 11-08-2020, 09:24 PM
RE: A ROM emulator for the 71B - Harald - 11-08-2020, 11:02 PM
RE: A ROM emulator for the 71B - mfleming - 11-27-2020, 12:00 AM
RE: A ROM emulator for the 71B - KimH - 11-30-2020, 05:08 PM
RE: A ROM emulator for the 71B - mfleming - 11-09-2020 01:08 AM
RE: A ROM emulator for the 71B - Moggul - 11-10-2020, 08:12 AM
RE: A ROM emulator for the 71B - Sukiari - 11-27-2020, 12:18 AM
RE: A ROM emulator for the 71B - mfleming - 11-27-2020, 01:45 AM
RE: A ROM emulator for the 71B - Harald - 11-27-2020, 06:07 PM
RE: A ROM emulator for the 71B - mfleming - 11-27-2020, 10:58 PM
RE: A ROM emulator for the 71B - Kevin71B - 01-10-2021, 02:20 PM
RE: A ROM emulator for the 71B - mfleming - 01-17-2021, 01:31 AM
RE: A ROM emulator for the 71B - mfleming - 01-17-2021, 03:51 AM
RE: A ROM emulator for the 71B - mfleming - 01-17-2021, 04:35 AM



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