Apple II Plus


At A Glance

Apple II Plus

The Apple II Plus was the second model in the original Apple II line of personal computers. Launched in 1979, the Apple II Plus sported 48 KB RAM (expandable to 64KB) and included Applesoft BASIC baked into the ROM (written by Microsoft).

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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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