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  1. K

    IBM 5151 making a loud whining noise after warming up

    I have an IBM 5151 display that is working great (stable raster, good brightness, decent focus) except that it starts making an awful whining noise after about 20-30 minutes of use. Turning the display off and letting it rest for an hour doesn't have any effect. Once it's started to make the...
  2. K

    Turbo XT that suffers filesystem corruption when in 'turbo' mode (only)

    So this is a real head-scratcher... I recently acquired a Logicraft 88-XT machine, which is a generic Turbo XT system with 640K of RAM and an NEC V20 processor (in a socket labelled "8088-2") that runs at either 4.77Mhz or 8Mhz. I can't find schematics or a manual for this machine, but the...
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