26 Apr
2007
26 Apr
'07
10:45 p.m.
Hi,
Ooer, don't say that....there used to be *lots* of them at radio rallies,
My experience is that all the second processors -- no, make that all the
'cheese wedgrs' -- are rear.
Think
I'll just get a Z80 Second Processor for my Beeb
instead (far less hassle).
I didn't think those were _that_ common... I suppose I could always make one, assuming the
necessary ROM images are
available somewhere? I don't recall there being any custom logic in the 6502
I think you've forgotten the 'TUbe ULA' That's a 40 pin custom chip that
handles the communication between the Beeb and the second procrossor, and
AFAIK it was never fully documetned by Acorn.
Second Processor and my memory of the Torch Z80 2nd
processor is waaay to
hazy.
The Torch Z80 board did, indeed, use only sandard chips.
-tony