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kakemoms
 Post subject: Ceramic 6502
PostPosted: Sat Feb 13, 2021 8:56 pm 
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Joined: Wed Mar 02, 2016 12:00 pm
Posts: 343
Hi

I just bought a KIM-1 with a MOS6502 in purple ceramic. Its dated "C 2676" like the one here: https://cdn.cpu-world.com/CPUs/650x/S_MOS-MCS6502%20(purple).jpg

Anyone know what the "C" stands for? Its not mentioned in the datasheet (unlike the "A" suffix).
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Chromatix
 Post subject: Re: Ceramic 6502
PostPosted: Tue Feb 16, 2021 7:07 pm 
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Joined: Mon May 21, 2018 8:09 pm
Posts: 1462
It probably has to do with the manufacture location, production line, or batch of the day/week.

A ceramic 6502 from 1976 is a rare and potentially valuable beast. Consider testing it for the ROR bug, which was only present in the first year's production run, and was corrected sometime in 1976.
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