PC 20-III | 302564

• Mainboard revision: 6.2B
• CPU: Siemens 8088-1 running at 4.77MHz (Standard), 7.16Mhz (Turbo), or 9.54MHz (Double)
• Optional 8087 math co-processor
• RAM: 640KB
• ROM: 32KB Phoenix self-configuring BIOS Version 4.40
• Chipset: Faraday FE2010A single chip controller IC
• Clock: Battery-backed Real Time Clock (RTC) maintains the date and time while the system is powered off
• Floppy Drives:
  • A: Chinon F-502 LII 5.25” 360 KB DS/DD
  • B: 720K 3.5″ Chinon FB-354
  • HDD: Miniscribe 8245F 21MB MFM
• additional 16bit VGA card Trident TVGA9000C
• Sound: On-board piezoelectric beeper
• Ports:
  • 9-pin d-sub bus mouse port compatible with Commodore Amiga 1352 mouse (MOS 5720)
  • 25-pin d-sub RS-232 serial port (Western Digital WD8250-PL)
  • 25-pin d-sub 8-bit Centronics parallel port (Paradise PPC1)
  • DIN-5 IBM PC XT-compatible keyboard port
  • 9-pin d-sub RGBI/Monochrome video port
  • RCA composite video port
• Video: Onboard Paradise PVC4
  • MDA Monochrome Text
  • Hercules Monochrome Graphics
  • CGA Color Text and Graphics
  • Plantronics Colorplus Graphics
  • Alpha132 Monochrome Text
• 3x 8-bit ISA slots for expansion
• 75 watt power supply

• work performed:
  • battery removed, minimal leakage, all neutralized and cleaned
  • FDDs disassembled, cleaned and lubricated
  • whole machine completely dismantled and cleaned
  • main PCB, PSU, FDD and VGA card recapped with Rubycon brand 105° type
  • missing PSU casing screw replaced
  • original Tandon HDD (on Tandon “Business Card” controller) had main bearing stuck, jump started it mechanically and made a backup of all the data, HDD and controller replaced
  • HDD led cable soldered to HDD
  • Case HDD led replaced (someone melted the holder and cut the legs too short)
  • all six missing case screws replaced
  • HDD backup [Ghost 2]