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A ROM emulator for the 71B
01-17-2021, 04:35 AM
Post: #45
RE: A ROM emulator for the 71B
Hummm, I've reread this thread and noticed that most references to a takeover ROM concern the Diagnostic ROM rather than the OS ROM. So perhaps I should clarify things. It's perfectly possible to do a takeover ROM at address zero (assuming you have the shorting plug in Port 1), but not a persistent ROM (OS or otherwise) that would survive a power-down to sleep mode.

So the scenario in which you poke an enabling value, power off, insert the shorting plug, and then have a takeover ROM (e.g. Diagnostic ROM) running when you power back on seems to be feasible. If this sounds desirable, I can certainly add it to the task list. But, if you set the 71B aside for a while and power back on, the ROM won't be there. A quick on/off would bring it back unless you previously disabled it, which might not be want you want Wink

Be careful what you wish for...

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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