PC 30-III

Basically, a PC 30-III is a PC 40-III with no onboard VGA, a 20MB HDD (instead of 40MB) and an added EGA video card. There are two versions: One with a standard PC 40-III mainboard where all the VGA components simply were not installed, and a later version with a “real” PC 30-III mainboard. The silk screen between the ISA slots either says “PC 40-III” or “PC 30-III” respectively.

Serial: 028697

• PC 40-III Mainboard with unpopulated VGA area
• CPU: Intel 80286 running at 6MHz (standard) or 12MHz (double)
• Optional 80287 math co-processor
• RAM: 1024K [640K Base, 384K extended]
• ROM:
• Floppy Drives:
  • 1,44M 3,5″ Chinon FB-357
  • 360K 5,25″ Chinon FZ-502
• Hard Drive: [defective] WD 93028-A 21MB 3,5″/HH IDE/AT (Type 06)
• Ports:
  • 9-pin d-sub bus mouse port compatible with Commodore Amiga 1352 mouse [MOS 5720]
  • RCA audio out
  • 25-pin d-sub RS-232 serial port
  • 25-pin d-sub 8-bit Centronics parallel port
• Video: ATI 8 bit ISA GSSC Version 3 rev. 2
• 4x ISA slots for expansion [3x 16bit, 1x 8bit]

• work performed:
  • DALLAS fixed [voltage divider/cap]
  • FDDs disassembled, cleaned and lubricate
  • HDD removed for future diagnostic/repair
  • whole machine completely dismantled and cleaned
  • mainboard, 3,5″ floppy and PSU recapped with Rubycon brand 105° type

• notes:
  • has been re-sealed with second seal
  • 5,25″ FDD has different serial [reason for 2nd seal?]

• still to do:
  • repair HDD