PROMs offered: Should I take?

From: John Wilson <wilson_at_dbit.dbit.com>
Date: Sun Apr 2 12:09:41 2000

On Sat, Apr 01, 2000 at 09:09:55AM -0800, Bruce Lane wrote:
> I've been offered a cheap price on a tubeful of Signetics 82S123 bipolar
> PROMs.
>
> If memory serves (pun intended), these were used as boot ROMs for various
> PDP-11's of the UniBus persuasion.

My own flakey memory is telling me that the M9312 style bootstraps go in
82S130 PROMs, could be wrong though. Maybe it's the 82S129? Whichever one
is O.C. I believe the size works out to 128 bytes each, after the hardware
repacks it on the fly into 16-bit words.

> Is this so? If so, are they also useful for other classic apps? I'm
> considering picking them up, but don't know for sure whether I'd be wasting
> $10 or not...

Personally I'd go for it. You just never know!!

John Wilson
D Bit
Received on Sun Apr 02 2000 - 12:09:41 BST