PC 50-II

An IBM compatible 386SX desktop computer running at 16MHz. It offers an onboard VGA out as well as a CGA port (which blocks one of the ISA slots, but can be removed). Hard disk sizes from factory were either 0MB, 40MB or 100MB. This one came with a Conner 40MB, which I was able to repair to a certain degree to at least boot, but still is not working 100%. Replaced it with another bigger HDD, original HDD stored with the machine.

With original keyboard and manuals.

Serial: M90002675

• CPU: Intel 80386-SX running at 16MHz
• Optional 80387 math co-processor
• RAM: 1024K [640K Base, 384K extended] [SIPP modules]
• ROM: PC 50-II BIOS Rev. 1.01 [609200-03] / Phoenix
• Floppy Drives
  • A: 1,44M 3,5″ Newtronics/Mitsumi D359T3
  • B: 1,2M 5,25″ Chinon FZ-506
• Hard Drive: Now a Seagate ST3243A 214MB [as Type 25], originally a CONNER CP-3044 43MB
• Ports:
  • 1x parallel  [25-pin d-sub]
  • 2x serial [9-pin d-sub]
  • VGA out
  • CGA out [via expansion slot adapter, removable to free up the ISA slot]
• 6x ISA slots for expansion [5x 16bit, 1x 8bit]

• work performed:
  • whole machine completely dismantled and cleaned
  • FDDs disassembled, cleaned and lubricated
  • PSU recapped with Rubycon brand 105° type
  • HDD partially saved and repaired to at least boot up
  • “new” HDD installed and HDD activity LED connected to HDD PCB
  • yellow sticker on the back smoothed and re-glued
  • keyboard top shell [left half] and space bar retrobrighted