On Feb 13, 14:14, Allison J Parent wrote:
> <marked "AMD AM9217APC". I can't find a reference to them, does anyone
know
>
> The only amd I could find was 9517 (DMA controller like 8237). The 92xx
> series has memories so it could be ram or prom type device.
>
> <what they are? Also they say "Proto" below the IC number. Does that
mean
> <that these are prototypes?
>
> Very likely.
AMD used 91xx for RAM, 92xx for mask ROM (with a couple of exceptions), and
97xx for EPROM. AM9217 is an NMOS 2048 x 8-bit ROM; A is the speed
(550ns), P means 24-pin plastic, C means commercial temperature range (0-70
Celcius). Pinout is the same as an 8316, 2716 compatible, but the chip
selects on pins 18,20,21 can be specified either active-high or active-low.
The AM9217 was superceded in the late 70's by the AM9218.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
Received on Sun Feb 13 2000 - 14:56:23 GMT