ACRPC.NET

My Vintage Computer Virtual Museum and blog page.

IBM PCjr

My IBM PCjr (added to my collection in 2017).

  • 4.77Mhz i8088 CPU
  • 128K RAM (64K on board, 64K in JrCaptain RTC/LPT sidecar)
  • 360K Floppy
  • Game/Program cartridge slots
  • PCjr graphics (CGA plus some extra modes)
  • PCjr sound (TI chip 3 square wave and 1 noise channel)