CompuServe Messages

#RAM & Chip questions

    22-May-94 23:07:46
Fm: Vicki Jacobs 72147,2333
To: Ronald B. Romine 70322,1525
>>Either you have only 3-megs of RAM, or there was a type. …<< Ron, I have a feeling you are correct. I don't believe there was a typo but that 2 + 1 = 3. Indeed! ;^) Of course, there is always the possibility that (as you said) they were "not configured due to wrong jumper setting." According to the spec sheet for my 2500, there is "1MB 16 bit RAM and 2MB 32 bit RAM standard." The same sheet continues, "internally expandable up to an additional 6 MB (with AUTOCONFIG feature) -total maximum 9 MB." Up till now I have thought that MAX: had 4 MBs RAM. Being correct or incorrect about that doesn't distress me nearly as much as not being able to determine what is needed to obtain the additional RAM. In the owner's manual I've found this paragraph under the subtitle "Installing an Additional 2MB of Memory": The A2630 support an additional 2 megabytes of memory. (Memory type is 414256-10 ZIP-style package — 100ns.) For this upgrad you'll need 16 memory chips and a soldering iron. ….All references to the accelerator card assume that the Motorol chips are up and to the left, the memory chips are to the right, and the coprocesor slot connector edge is down and to the left." The first 2 sentences I understand, but the last means nothing to me. Right, left, up, down — from what or where? —————– In another part of the manual (actually the same page, printed above the previous quotes), under the subtitle "Memory Connectors" it says: "There are two 64-pin connectors on the back of the A263 board in locations CN300 and CN301. These connectors have been provided for the future addition of 32-bit expansion memory. At the time of this printing, such memory boards are not available." How convenient for them. ;^( If the board were available there would be no space in which to place it even though they've left the sockets. The 2091 board is immediately next to it and there is absolutely no room for another board between the two. I do recall seeing two long white rectangles that could possibly contain 2 rows of 16 holes (looked like sockets) but I didn't count the holes. Is it possible that the 2091 board could be moved one space over so as to accommodate the mentioned "32-bit expansion memory?" ——————— Even if I succeed in adding the 2MB of memory to the 2630 board, that would only mean I'd have 5 MBs of RAM. Where might the other 4 (to get to the maximum of 9) be added? Would the correct answer be to add ram to the 2091? The CMOS 256 x 4 DRAMs? (…and I'd need how many of those –4?) ——————— Thanks for all your replies, they are very helpful. Vicki …from the last hour of a too-long weekend