Apple IIGS: ROM Upgrade Information



I have a question about the ROM Upgrades sent to the field for the new Apple
IIGS logic board.

The ROM sent to us by Support Engineering looks like two of the ROM chips on
the main logic board. There were no instructions on which chip to replace.
Should we have received two chips? If not, which chip is the one to be
replaced?

The ROM that was sent goes in the socket labeled UJ9 (FFEF). The new ROM has
28 pins. If your board has a 32-pin socket at UJ9, put pin 1 of the ROM into
hole 3 of the socket. With the notched end of the chip towards the front of
the Apple IIGS, there should be two holes exposed on each side of the socket.
If the socket has only 28 holes, pin 1 goes to hole 1.


Published Date: Feb 18, 2012