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  1. M

    Removing C56 from IBM XT system board?

    Well, after resurrecting an IBM PC, with the valuable help of many senior members of this forum, I'm now tweaking with this IBM XT 5160. At minimum diagnostic configuration the power supply won't work, unless connector P8 is removed. The readings on the board power connector are: GND to +12V...
  2. M

    Resurrecting a IBM 5150: 601 code at POST. Need some help.

    I am trying to resurrect and old 5150 that was given to me as "not turned on in decades". It's a 1984 rev3 bios, with 256k RAM on board and 256k RAM on expansion card. It comes with two 5.25" floppy drives, monochrome monitor and keyboard, all pieces belonging to the original setup from IBM...
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