On 7/8/23 21:16, Terry Raymond wrote: > Hi I had some issues with the Sid chip not working fully, works one > time and then the next time no sound. In my cost reduced NTSC C64C. > > oops I did something to fry the CPU in my 64C so I just tried the 6510 > that worked once but the next time then the Sid chip wouldnt work. I > know the Sid needs the CPU. > The 8500 CPU is plugged into a crappy single wipe socket so I just > wonder if the CPU > just has a bad connection or the socket is bad, seems kind of funky. > > Of course the 64C uses the 8580 Sid I do own a few NTSC metal case > 128DCR's so I put the > 8580 Sid in one of the 128D's it works just fine, no intermittent problems. > > So again I just used a 6510 CPU that works just fine in a breadbin 64 so > the CPU is fine. > > I was told the only difference with the MOS 8500 or MOS 6510 is: > > 8500 CPU CMOS runs cooler The 8500 is HMOS not CMOS. > 6510 TTL runs hotter The 6510 is NMOS. > So either can be used in the 64C. Yes, makes no difference, there are some 250425 boards that came with an 8500R3 from the factory. Later they switched back to the 6510 and the 250469 boards then came with the 8500 in Revision 4. GeritReceived on 2023-07-08 22:02:43
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