CompuServe Messages

VJ >>I still can't figure out what makes this thing so heavy –sure wasn't the _dust_ making it weigh so much. <g> << I think its the metal shielding that makes the machine so heavy. You need to have a lot of shielding to block the 'radio interference' generated by the electronics — or everyone on the block will see MAX: dancing on their TV's. 🙂 — VJ >>The A2091 doesn't appear to have much in the way of possible spaces for adding anything […]<< After re-checking my info, I believe the A2091 only allowed 2-megs of RAM to be added to it. — VJ >>I'm wondering if these little things that look like rabbit ears are […] Printed beneath this set of 4rabbit ears were the words: memory size JP1. Sounds like you found the jumpers. Did they look like pins nailed into the board, standing in pairs? These pins are 'wires' sticking up. The black 'hat' is plastic, but contains a metal wire inside. When the black box is plugged across a pair of pins, a bridge is created that activates a feature or option. Often, when a black box isn't being used, the box will be pushed down onto only one of the pins. — VJ >>Each of the 4 had a corresponding "name". Top was 2M; 2nd one down was 1M; 3rd was 512K; and the last one was "OK" <—-only one wearing hat.<< These jumpers let the A2091, know how much RAM you have plugged into it, so that it doesn't mistake missing RAM for bad RAM chips. You can have 2-meg, 1-meg, 512K, or 0K (zero K) of RAM on the A2091. Sounds like the A2091, is set to have 0K (zero K) of RAM activated. If the A2091, uses '256k x 4' DRAMs, you could have upto 8 RAM chips plugged into the board. — VJ >>A similar set of rabbit ears named "options" and labeled 1; 2; and 4 each wore half a hat (one ear was bare).<< I assume you mean on the A2630 board. These are the jumpers that tell the A2630 how much RAM is plugged into it. Either 1-meg, 2-megs, or 4-megs. It apprears the A2630 allows for only 4-megs of RAM to be plugged into it. — VJ >> It appears they should be grouped in sets of 4. There is enough space for 16 of this kind of chip.<< Sorry, you need to add in sets of 8. And each 8 chips, gives only 1-meg of memory. Buying RAM chips, is like buying pizza by the slice. You can buy either eight 1-bit slices to make a whole 8-bit pizza, or you can buy two 4-bit slices to makes a whole 8-bit pizza. Those '256k x 4' chips provide 4-bits of an 256K pizza. To make a whole 256K pizza, you need 8-bits — thus two '256K x 4' chips. Also, the A2630 wants 32-bits at a time for it's RAM dinner, with each RAM chip giving 4-bits, you need to add eight chips (8 x 4-bits = 32) at a time. — We need to re-check the math, or the configuration of your Amiga. I thought one of your origional messages said, that you had 4-megs of RAM in your Amiga. I re-read the message containing your ShowConfig. You mention only 1-meg of CHIP, and 2-megs of FAST RAM. *If* the A2091 is empty (0K), then the remaining memory is from the A2630 board. And the A2630 allows 4-megs, added in groups of 8 chips. If sixteen sockets are empty, then 2-megs are filled. Either you have only 3-megs of RAM, or there was a typo. Unless there is 1-meg on the A2091 card — not configured due to wrong jumper setting. Ron. – ap'ing with AP. (Eagles may fly, but weasels aren't sucked into jet engines.)