A CONTRIBUTION TO THE "SUPER GS PROJECT"

[cturley2@aol.com (Cturley2)]

 A CONTRIBUTION TO THE "SUPER GS PROJECT"

Have you noticed that The ROM sockets in a GS 03 motherboard have an extra 4
holes beyond their 28-pin sockets? I have seen a 32-pin ROM in where the
ordinary 1-Meg 28 pin ROM normally resides. There are 2, 4, and even 8Meg ROM's
on 32-pin chips. How about putting ALL of system 6 (or whatever else) into ROM
for fast access? There are all sorts of utilities which could fit into the
(vast) excess ROM space.

To allow a 32-pin chip into a ROM 03 GS, buy a (24-pin or 28-pin) WIDE socket
at
Radio Shack. Use a hacksaw blade or any fine-toothed saw to saw off a 4-pin
socket from the end, 2 pins on each side. Smooth off and trim the jagged edge
of
your little 4-pin socket with a flat jewler's file (or emory board).

Clear the 4 holes at the (notched) ends of the ROM sockets on the GS ROM 03
motherboard as follows. Clamp the motherboard gently but firmly in an upright
position so you can apply the nozzle of a solder sucker on one side of a hole,
and the tip of a hot soldering iron to the other side of the hole on the
opposite face of the motherboard. Squeeze the bulb of the solder sucker and,
holding its nozzle against the hole, melt the solder from the other side. Let
go
of the pressure on the rubber bulb but keep its nozzle against the hole. The
result should be that the solder sucker "inhales" the liquid solder, freeing
the hole.

Carefully trim any excess solder from the margins of the hole with a "dry" but
hot soldering iron tip.

Position your 4-prong socket into the 4 holes, flush against the motherboard
and
flush against the 28-pin socket already in place. Brush the pins to be soldered
with electrical (rosin) solder flux and solder into place filling, but not
over-filling the holes you just emptied.

Your GS ROM 03 is now ready for a 32-pin eprom. Such eproms (27C10, 27C20, and
27C40 are available from many places. I use Jameco and ask for a data sheet
along with the chip for a pin-out to aid in its programming.)

Most sincerely yours,
Dr. H. Levinson (Hank)
(aka "St. Nick")
Prof. Mathematics
Rutgers University, Newark NJ 07102