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From: XA.W51%STANFORD.BITNET%Berkeley@sri-unix.UUCP
Newsgroups: net.micro.pc
Subject: Reading 2764 EPROMs in a PC
Message-ID: <12611@sri-arpa.UUCP>
Date: Sat, 21-Apr-84 12:35:00 EST
Article-I.D.: sri-arpa.12611
Posted: Sat Apr 21 12:35:00 1984
Date-Received: Sat, 28-Apr-84 10:43:58 EST
Lines: 9

From:  Robert A. Lerche <XA.W51%STANFORD.BITNET@Berkeley>

The ROM sockets in the PCs I have looked at are 24-pin, while the 2764 is a
28-pin device.  The ROMs in the PC are the "mask ROM" variety, and have a
different pin-out from the byte wide programmable ROMs.  In particular,
according to the Tech Ref manual, pin 18, used for "output enable" in the
standard byte wide pin-out, is A11 in the PC's ROMs.  You can probably rig
something to work, but it will require some wiring and a kludge device to
take care of the top 4 pins on a 2764.