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75D First Steps.
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04-21-2021, 09:42 PM
Post: #11
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RE: 75D First Steps.
(04-21-2021 09:06 PM)rprosperi Wrote: I don't recall this being done with the 75C/75D. No doubt that was partly due to the very high cost for these machines, but I'm also not sure if 4+ ROMs could be installed (logically) at the same time.memory space allocation IVT: 0 to 17B (9 ISR using 2 bytes each) ROM: 18B to 24K ROM: 24K to 32K bank switched system & front port ROM (maximum 18 banks or 6 banks per front port slot) RAM: 32K to 56K ROM: 56K to 64K-256 I/O: 64K-256 to 64K All 8KB of all the banks of all plugin ROMs are located at the same address space (24k to 32K) |
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| Messages In This Thread |
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75D First Steps. - dhe - 04-15-2021, 09:33 PM
RE: 75D First Steps. - dhe - 04-15-2021, 09:35 PM
RE: 75D First Steps. - Dave Frederickson - 04-15-2021, 09:52 PM
RE: 75D First Steps. - dhe - 04-15-2021, 10:57 PM
RE: 75D First Steps. - Dave Frederickson - 04-15-2021, 11:58 PM
RE: 75D First Steps. - Sylvain Cote - 04-16-2021, 02:18 AM
RE: 75D First Steps. - rprosperi - 04-16-2021, 02:29 AM
RE: 75D First Steps. - dhe - 04-16-2021, 12:23 PM
RE: 75D First Steps. - dhe - 04-21-2021, 07:25 PM
RE: 75D First Steps. - rprosperi - 04-21-2021, 09:06 PM
RE: 75D First Steps. - Sylvain Cote - 04-21-2021 09:42 PM
RE: 75D First Steps. - Paul Berger (Canada) - 04-21-2021, 11:10 PM
RE: 75D First Steps. - rprosperi - 04-22-2021, 12:46 AM
RE: 75D First Steps. - dhe - 04-22-2021, 08:53 PM
RE: 75D First Steps. - Paul Berger (Canada) - 04-22-2021, 09:49 PM
RE: 75D First Steps. - Dave Frederickson - 04-22-2021, 11:08 PM
RE: 75D First Steps. - dhe - 04-23-2021, 12:01 AM
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