On Mon, 30 Jul 2001 at 10:12:38, Adrian Vickers wrote:
(ref: <[EMAIL PROTECTED]>)
>>>No, the JMs are definitely not EPROMS. They may be EEPROMs, I suppose, but
>>>they seem to have all the proper markings to be a plain old ROM. Is it
>>>plausible that the former owner may have used a Gold Card (or similar) and
>>>had a start-up disk/mdv to alter the keytable?
>>Was that possible with std roms?
>
>I think so - doesn't the Gold Card copy the ROM into RAM? I forget how you
>go looking for it, but IIRC it does tell you in the manual. If it's in RAM,
>of course, it's susceptible to patching...
It was only in unprotected ram for early Gold Cards. Miracle very soon
protected that area, as rogue programs could easily zap the copied rom.
One problem with that approach was that Miracle had to patch roms to
make the work with GC - I forget exactly what for. therefore any new
roms, including Minerva. may need changes in the GC/SGC roms to patch
correctly. Has anyone got the details of the patches?
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