XA.W51%STANFORD.BITNET%Berkeley@sri-unix.UUCP (04/21/84)
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.