--- Spiro Trikaliotis <trik-news@gmx.de> wrote:
> Ethan Dicks wrote:
>
> > If anyone is interested, I have a number of NOS (New Old Stock) 6821 chips
>
> the original motorola where labeled the following way:
>
> - MC6821 is 1 MHz
> - MC68A21 is 1.5 MHz
> - MC68B21 is 2 MHz
I have a few tubes of Motorola 6821P (1MHz) and a few tubes of Fairchild 6821
(no designator).
Thanks for the tip.
-ethan
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