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-