COSMAC Elf

COSMAC Elf
COSMAC Elf with Pixie Graphics Display
ManufacturerRCA
Released1976 (1976)
CPURCA 1802
Memory256 bytes of RAM; expandable
GraphicsRCA CDP1861
SoundBeeper
PredecessorFRED / System 00
SuccessorCOSMAC VIP

The COSMAC Elf is an early single-board personal computer based on the RCA 1802 microprocessor. It was originally described in a series of construction articles in Popular Electronics magazine in 1976 and 1977. Through the back pages of electronics magazines, both Netronics and Quest Electronics offered low-priced, enhanced kits based on this design. The system operated without read-only memory (ROM) chips—programs were entered directly into RAM memory using the 1802's integrated direct memory access (DMA), 8 toggle switches, and an Input push button. An updated commercial version called the COSMAC VIP was later sold in kit form.

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