Group Description

The RCA CDP1802 COSMAC microprocessor was the basis for several hobbyist computers in the mid 70s and early 80s. Join this group to discuss these old computers or share your 1802 experiences. 

Visit for more on the history of 1802 microcomputing, data sheets, articles, photos, and more --- including a complete archive of Ipso Facto newsletters.

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Top Hashtags [See All]

  • #Homebrew Original 1802 computer creations 19 threads
  • #ELF Classic or minimal ELF builds 12 threads
  • #Serial Serial communications 10 threads
  • #Assembler 1802 assemblers and cross-assemblers 9 threads
  • #ThisGroup Messages about the group itself 8 threads
  • #ELF2K Spare Time Gizmos' ELF 2000 7 threads
  • #microboards 6 threads
  • #SuperElf Quest Electronics SuperElf 6 threads
  • #mcds 5 threads
  • #Electronics More about volts than bytes 5 threads

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