RE: MM2114N RAM Replacement

From: Clay Cowgill <ClayC_at_diamondmm.com>
Date: Mon Mar 29 1999 - 17:56:42 EST

> According to MAME this game uses a 6502 running at 1.5 MHz.
> No way will a 450 nS RAM keep up with that. Go with the fast
> part.
>
> (By the way, the NTE part is 300 nS).
>
That'll be fine. Running "balls-out" (not sure if that's a technical
term or not ;-) a 450ns RAM could serve data up at about 2MHz
(1/.000000450). Since the 6502 doesn't actually hit external memory
every cycle the actual number is considerably less than 1.5MHz... 450's
should work dandy.

-Clay
Received on Mon Mar 29 16:56:59 1999

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