20 Oct
2009
20 Oct
'09
2:03 p.m.
Josh Dersch wrote:
Ok, so it's stretching the definition of
"computer" but it _does_ have
a BASIC programming cartridge and it IS classic (1978) so I think it
qualifies... Got me a Bally Astrocade that appears to have a dead I/O
chip. From the service manual, this is a custom chip listed as PN
"0066-117XX-XXYX"... I figure it's a long shot, but anyone out there
have spare parts for these? I figure if anyone knows, they're on this
list :).
Thanks as always,
Josh
If the CPU is a Z80, then the I/O is likely to be a 8255, if the CPU is
a 68XX then the I/O is likely a 6821, and if the CPU is a 6502, then the
I/O is likely either a 6520, 6821, or 6532. Check how the power pins to
it compare to those common I/O chips of the day.
John :-#)#