PC 50-III / SL386SX-16

The PC50-III belongs to Commodore’s Slimline Series PCs. These systems can have either a 286 or a 386SX CPU on a separate processor card.
The PC50-III mainboard was designed/and built by Commodore, but there are also Commodore Slimline Series PCs with a 286 or 386SX CPU which were based on a mainboard by DTK.

This unit seems to have been used in a medical facility, all the software is still on the hard drive.

• CPU: Intel 386SX @16MHz [on separate CPU board]
• BIOS [image]
• RAM: 2MB
• FDD: A:\ Chinon FZ-357 3,5″ 1,44MB
• HDD: Seagate ST351A/X 43MB IDE/AT [Type 17]

• jumper settings:
  • JP101 In: 386SX Out: 286
  • JP102 In: 8 Bit BIOS (*) Out: 16 Bit BIOS
  • JP103 In: IOL=24ma (*) Out: IOL=12ma
  • JP104 In: 386DX Out: 386SX (*)
  • JP701 In: RTC=170H (*) Out: RTC=70H
  • JP702 (1) In: fwp=187ns Out: fwp=125ns (*)
  • JP703 (2) In: ftssm enabled Out: ftssm disabled (*)
  • JP704 In: enable disk chg Out: diskable disk chg (*)
  • (*) = default switch position
  • (1) = floppy write precompensation (see WD37C65 spec)
  • (2) = floppy two speed spindle motor

• work done:
  • PSU / mainboard / CPU board / FDD recapped with 105° Rubycons
  • metal parts polished
  • sticker on back side re-glued
  • front bezel corner repaired/glued
  • lithium battery removed [kept separately]
  • HDD backup [Ghost 2]