Apple II j-plus


At A Glance

Apple II j-plus

The Apple II j-plus is was a rare version of the Apple II made for the Japanese market. Launched in 1980 and based on the Apple II Plus, it had supported the Katakana character both on screen and on the keyboard. It retailed for over US$4000.

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Original Specifications


  • Logic Board:
    • Microprocessor: 6502
    • PMMU:   none
    • FPU:   none
    • Bus Speed:   1 MHz
    • Data Path:   8-bit
    • ROM Size:   16K
    • Level 1 Cache:   none
    • Level 2 Cache:   none
    • Battery:   none
    • Expansion Slots:   8 Apple II Proprietary Slots
    • Recommended Slots:
    • ▪ Slot 0: Language Card
    • ▪ Slot 1: Printer
    • ▪ Slot 2: Modem
    • ▪ Slot 3: 80-Column Card
    • ▪ Slot 4: Other device
    • ▪ Slot 5: Drive 2 or other device
    • ▪ Slot 6: Drive 1
    • ▪ Slot 7: Co-processor
  • Memory:
    • Min – Max RAM:   16K – 64K
    • Minimum RAM Speed:   200 ns
    • Onboard RAM:   16k – 48K
    • Note: 64K of RAM is achieved with a language card in slot 0.
  • Ports:
    • I/O Ports: Video out (composite), 8 expansion slots, Tape recorder, Paddles, Mono speaker
  • Video:
    • Display Resolution:
    • ▪ 40 x 48 (16 colors), 280 x 192 (6 colors)
    • ▪ 40 columns by 24 rows
    • ▪ Composite monitor or RF Modulator to TV supported.
  • Operating System:
    • Compatible OS:   DOS 3.2, DOS 3.3, ProDOS, CP/M (with Z-80 card), Pascal
    • Languages in ROM:   Applesoft BASIC
    • Addressing Modes:   8-bit
  • Dimensions:
    • Height: 4.25 in
    • Width: 15.25 in
    • Depth: 17.75 in
    • Weight: 11.5lbs



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