PROMs offered: Should I take?

From: Doug Coward <>
Date: Sat Apr 1 15:57:08 2000

> Date: Sat, 01 Apr 2000 09:09:55 -0800
> From: Bruce Lane <>
> Subject: PROMs offered: Should I take?
> 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.
> 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...
> Thanks in advance.
  The 82S123 is the installed monitor PROM in the Quest Super ELF and
it's a
great little PROM for any 1802 application. I believe most of the toggle
monitors listed in the PE ELF articles will fit in 32 bytes. And since
the 1802
need external address latching to access more than 256 bytes, having
whole operating system in 32 bytes leaves plenty of space for
on a 256 byte minimalist system. :)

Doug Coward (work)
Sr. Software Eng. (home)
Press Start Inc.

Analog Computer Museum and History Center
Received on Sat Apr 01 2000 - 15:57:08 BST

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