[BBC-Micro] New 6502 second processors?
jules.richardson99 at gmail.com
Mon Oct 6 22:05:55 BST 2008
Phil Blundell wrote:
> On Mon, 2008-10-06 at 20:14 +0100, Michael Firth wrote:
>> Has anyone given any thought to producing replacement internal or
>> external 6502 second processors?
> I did think about this at one point, and I actually got as far as
> building some PCBs with the appropriate circuitry on. The idea was to
> put the 6502 plus ULA emulation into a single FPGA
I'm tempted to say that some sort of PC-to-TUBE interface would be useful,
then you could emulate whatever [external] second processor you wanted to in
software. Normally I like messing around with the bare metal (so I'm not
really an emulator fan), but it's not like the second processors have a lot of
external interfaces anyway, so a software approach doesn't lose *that* much.
 bonus points for stuffing an ultra-compact PC into a cheese-wedge case, of
course - possibly with a little LCD readout in the label area which says what
type of 2uP it's currently emulating ;-)
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