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 17 threads
  • #Serial Serial communications 9 threads
  • #ELF Classic or minimal ELF builds 9 threads
  • #Assembler 1802 assemblers and cross-assemblers 7 threads
  • #Electronics More about volts than bytes 5 threads
  • #ThisGroup Messages about the group itself 4 threads
  • #Microtutor RCA Microtutor 4 threads
  • #SuperElf Quest Electronics SuperElf 4 threads
  • #Arduino Arduino related projects 3 threads
  • #Forth Forth language 3 threads

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