I know this isn't strictly related to the A8 because it's a commodore 128D I'm trying to revive, but given that these are common chips for 65xx-based machines I thought someone around here might know...
The symptoms of my dead machine (well.. internal diskdrive) point to either a 6502 or 65SC22 being dead, and from past experience I'm willing to bet on the 6522. Does anyone know of a supplier in the UK where I can get those things these days?
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Suppliers for chips (6502/6522) in the UK. anybody know?
Started by sack-c0s, Nov 28 2011 6:06 AM
7 replies to this topic
#1 OFFLINE
sack-c0s
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Dragonstomper
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Posted Mon Nov 28, 2011 6:06 AM
#2 OFFLINE
GroovyBee
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Posted Mon Nov 28, 2011 6:29 AM
I was going to suggest the stardot forums for the Beeb but I see you've posted there too. You might want to PM retroclinic over there.
#3 OFFLINE
HiassofT
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Dragonstomper
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Posted Mon Nov 28, 2011 6:32 AM
New 65C02S and 65C22 chips are available from the Western Design Center - if you can use the CMOS variants. The DIP40 variant has the suffix TPG (TPLG is PLCC44). The Website lists Coltek and TRG as their UK distributors, Jameco and Mouser are listed, too.
so long,
Hias
so long,
Hias
#4 ONLINE
Rybags
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Posted Mon Nov 28, 2011 6:42 AM
For a C128 you'd need a 6510 variant, ie one with the onboard I/O bits.
Not sure if they used the same as in the C64 - later ones were generally 8500 series.
The C128 has 2 CIAs, so one way of diagnosing can be to swap them around.
ed - http://en.wikipedia....Technology_8502
Not sure if they used the same as in the C64 - later ones were generally 8500 series.
The C128 has 2 CIAs, so one way of diagnosing can be to swap them around.
ed - http://en.wikipedia....Technology_8502
Edited by Rybags, Mon Nov 28, 2011 6:45 AM.
#5 OFFLINE
sack-c0s
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Posted Mon Nov 28, 2011 7:09 AM
It's going to be the drive CPU that's died, so that would actually be a 6502 looking at the diagnostics list in front of me.
Hopefully the swop trick will diagnose it, but the sheet says the symptoms are the same if either 6522 fails. I know that wasn't the case on the 1541 though, so I might get lucky...
Hopefully the swop trick will diagnose it, but the sheet says the symptoms are the same if either 6522 fails. I know that wasn't the case on the 1541 though, so I might get lucky...
#6 ONLINE
Rybags
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Posted Mon Nov 28, 2011 7:12 AM
The 6502 out of early 400/800 (non Sally) is probably compatible with C= drives... but then again maybe they changed variant again with the internal drive of the 128D.
#7 OFFLINE
sack-c0s
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Posted Mon Nov 28, 2011 7:48 AM
I'd like to escape from this forum (and others that I may have asked in) with my testicles intact, so I'm going to try and avoid cannibalising other machines - especially ones from other manufacturers. Having another dead machine would be the least of my problems compared to the holy war that would follow 
#8 OFFLINE
sloopy
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Posted Mon Nov 28, 2011 12:47 PM
The CPU for the C128 which is a 8502 is specific to it, and the C128 doesnt have 6522's, it has 6526's... which were for the most part only found in C= machines...
these parts you will need to find from either a donor C128, or a C= supplier...
sloopy.
these parts you will need to find from either a donor C128, or a C= supplier...
sloopy.
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