IC question and hamfest finds - test-drb@ccmp.vtda.org

13 Feb 2000

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 The AM9217 was superceded in the late 70's by the AM9218.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