Old_hitech
Experienced Member
I have a IBM PC 5150 Rev A 16K -64K motherboard that appears "dead" with original BIOS rom. I previously found a +12V cap that was shorted and have removed it. I installed Supersoft diagnostic ROM and get the following results. I have ram chips installed in Banks 0, 1, 2 and 3. Item 1- is when the NO MEMORY ERROR 14000 yields bit position Xs (in 7, 6, 2 and 0 position). Item 2 -Shortly after that the screen changes to MEMORY ERROR AT ADDRESS 1C000 and bit position Xs (in 7, 6, 2 and 0 position). Item 3 - After about 3 1/2 minutes the first pass ended with memory error at 98000 and bit position Xs (in 7, 6, 2 and 0 position). There were a few other memory error noted, but always with bit position Xs (in 7, 6, 2 and 0 position). I'm thinking that I should replace Bank 0 (soldered in) RAM for Bit 7 first, then re-run the diagnostics, but the first MEMORY ERROR AT ADDRESS 1C000 is not indicating a Bank 0 location. Looking for recommendations on what I should do next?
P.S. I tried to upload some pictures of the screen for items 1-3, but the upload tool kept stating that file sizes were too large. When I adjust picture size to acceptable size, I could not read any of the screen information. I would like to know what I am doing wrong when uploading pictures. Thanks.
P.S. I tried to upload some pictures of the screen for items 1-3, but the upload tool kept stating that file sizes were too large. When I adjust picture size to acceptable size, I could not read any of the screen information. I would like to know what I am doing wrong when uploading pictures. Thanks.