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System-4 CPU/1861 Video/Keyboard Card

This a combined CPU/Video/Keyboard card. The right side of the card is the basic 1802 and support circuits. The bottom left contains an 1861 video subsystem and the upper left contains the parallel keyboard interface. This card was made obsolete by a new 6845 based video card.

http://cottageworker.com/wp-content/uploads/2014/05/

Author kenPosted on June 19, 2013September 2, 2014Categories 1802 projectsTags 1802x-xprojects, krpost, system4

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  • YACC1 – Yet Another Custom CPU
    • YACC1 – Home Page
    • BUS/Motherboard
    • Memory
      • ROM-Switch Board (16 bytes)
      • RAM Latch Board
      • Memory Board large
    • ALU Board
    • Index Register Board
    • I/O Board
    • Sequencer Board Set
      • Sequencer logic
      • Sequencer memory
    • Test Board Basic
    • Test Board Complex
    • Software
      • Opcodes
      • Microcode
      • Assembler
      • BASIC
      • Emulator
    • YACC – Yet Another Custom CPU (all posts)
  • Other Projects
    • 1802 projects
    • Meter Clock
    • Other Projects
  • Business
    • EIR
    • Clippings
  • Methods
    • Othermill
  • Technologies
    • Clippings
  • Resources
    • Entrepreneurship Books
    • Other Books
  • About
    • Contact
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