Msg: 6860 *Conference*

11-23-96 09:41:46

From: RICHARD HANSON

To : WILLIAM MCWEENY

Subj: REPLY TO MSG #6858 (QUESTIONS)

Adding a ROM to the Just RAM Booster Pac is actually quite simple, if you have
the ability to solder.  Here's the deal.

I would send you the ROM without it installed in the ROMBO carrier, i.e. an
external circuit board, invented by Dr. Tracy Allen, EME Systems, Berkeley, CA,
used to map the DIP pins to their correct location in the Molex socket (i.e.
option ROM socket) in a Model 100, 102, or 200.

Hmmm... now that's a first!  I put two "i.e."s in a single sentence.  This
calls for a celebration... time for another cup of coffee and coco! :)

You would then select a socket, currently filled with a RAM chip (I'd start
from the left hand side of the BP motherboard).  Pull out the RAM chip, place
it in a plastic bag and set it aside.

Immediately above and slightly to the right of the socket is a jumper.  The
jumper is currently connecting the left and center pads.  In a full-service
Booster Pac there are 3 pins sticking up out of the three pads, with an
easily-removable jumper block slipped down over two of the pins.  On the Just
RAM BP, their are no pins -- rather a jumper is soldered between the left and
center pads of the three pads.

Your goal is to unselect the left-center combination in favor of the
center-right combination.  A side goal is to cause the least damage!

 1) Snip the jumber close to the "left" pad.
 2) Bend the jumper 180 degrees to the "right" pad.
 3) Add some flux to jumper-end and pad
 4) Bend jumper down until it touchs the pad
 5) Solder

Insert your ROM and set it up via the Booster Pac instructions.

The process is actually quite simple.  I've noted that the main trick is to
have a sharp-point on your soldering tool ... get it in there, heat both
jumper-end and pad, apply solder and remove the tool.

Good luck... -Rick-