1 Apr
2000
1 Apr
'00
7:57 a.m.
Date: Sat, 01 Apr 2000 09:09:55 -0800
From: Bruce Lane <kyrrin(a)bluefeathertech.com>
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
switch
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
your
whole operating system in 32 bytes leaves plenty of space for
applications
on a 256 byte minimalist system. :)
--Doug
====================================================
Doug Coward dcoward(a)pressstart.com (work)
Sr. Software Eng. mranalog(a)home.com (home)
Press Start Inc. http://www.pressstart.com
Sunnyvale,CA
Curator
Analog Computer Museum and History Center
http://www.best.com/~dcoward/analog
====================================================