[BBC-Micro] A500 development ROMs
jules.richardson99 at gmail.com
Fri Oct 24 18:25:04 BST 2008
chris whytehead wrote:
> I really must try and dump the ROMs on the A500 co-processor, anyone
> recommend an EPROM programmer/reader to do this?
It doesn't really matter when reading most ROMs - really early stuff
(pre-Acorn) can need some funny voltages that don't exist on more modern
systems (and so aren't supported by any typical programmer).
Just about anything will do and cope with 2764-era devices (heck, with a bit
of futzing around with tied address lines and a suitable socket, you could
read them in a few passes on a Master, I suppose).
My programmer's a real beast - vintage in its own right. It's standalone unit
that does PALs as well as EPROMs, with about ten sockets along the front, and
is Z80-based with a keypad for control. It's only got about 512K of workspace
memory (SIPPs, bleh) though, so it can't do the really huge EPROMs but is fine
for 99% of what I need. Hooks up to whatever-you-fancy via an RS232 link, and
can talk various transfer protocols.
Second to the Domesday player, it's the worst construction of anything I've
ever seen :-)
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