3 ms·
"The week number for the 6502 is important because apparently 6502s made up to week 26 had faults!" I thought only the first revision 6502's (1975, in a white
by CrLf 3y ago
"The week number for the 6502 is important because apparently 6502s made up to week 26 had faults!"
I thought only the first revision 6502's (1975, in a white ceramic package) had the ROR bug, or are these faults something other than ROR?
In a video from early this year, Eric Schlaepfer claims the ROR behavior in the early 6502's isn't actually a bug, the instruction was consciously left out. I found the explanation interesting:
https://www.youtube.com/watch?v=Uk_QC1eU0Fg https://www.youtube.com/watch?v=Uk_QC1eU0Fg
- RetroTechie 3y agoAlso of note: datecodes in "wwyy" format. "yyww" is far more common. Funny thing is (assuming that KIM-1 still works): you buy a brand new computer today. In 5, 8 maybe 10y (if you're lucky) it will be ewaste. Quicker if it's a phone. And chances are by then that KIM-1 will still work. Or be easy to repair. Similar with many machines of that period. Tech has advanced tremendously. But in some aspects, backwards.