Hello,
Ethan Dicks wrote:
> If anyone is interested, I have a number of NOS (New Old Stock) 6821 chips
[...]
> They work great on an 8MHz 68000, but I presume they are 1Mhz or 2Mhz chips.
> Not sure at this point.
the original motorola where labeled the following way:
- MC6821 is 1 MHz
- MC68A21 is 1.5 MHz
- MC68B21 is 2 MHz
Spiro.
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