I/O chip for Bally Astrocade?

[Josh Dersch]

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