Netronics ELF II
Released:1978
Price:$149.95 ($99.95 kit)
CPU:RCA 1802 @ 1.76MHz
RAM:256 bytes, 64K max
Expansion:5 slot expansion bus
Display:Two-character LED display
Interface:Hex keypad
OS:Machine language
 Tiny BASIC available


The original "COSMAC ELF" was a construction project printed in the August 1976 issue of Popular Electronics.

In 1977, RCA released the RCA COSMAC VIP, their own $275 commercial version based on the 1802 "COSMAC" CPU, which they themselves produced.

In 1978, the Netronics ELF II was released - a cheaper and improved version - with all the parts required to build your own "world's most practical computer" for just $99.95.



Improvements over the original COSMAC ELF project include:
  • Pre-built double-sided PC board
  • Hexadecimal keypad with associated logic
  • An 86-line bus for system epansion
  • CDP1861 "Pixie" video graphics

  • The Netronics ELF II comes with very simple operating instructions that soon make you an expert, even if you've never had your hands on a computer before, whether for complex business, industrial, scientific, or hobby applications.

    Once you've mastered each of the commands an RCA 1802 will execute, these expansion boards let you run circles around "big name" personal computers that sell for a lot more money:
  • "giant board" ($59.95/$39.95 kit) - cassette I/O, serial port, parallel port, a monitor ROM
  • 4K static RAM board ($114.95/$89.95 kit)
  • 16K static RAM boards ($229/95/$199.95 kit)
  • color video board


  • Related Links

  • http://www.qwkslva.com/Museum/Netronics_Elf/netronics_elf.html
  • http://www.cosmacelf.com/
  • http://en.wikipedia.org/wiki/ELF_II
  • http://www.sbrune.com/COSMAC/Personal_Microcomputer_for_100.pdf
  • http://www.emma02.hobby-site.com/index_elf2.html
  • http://www.squidoo.com/cosmac-elf



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