Neal Granroth's ELF Build

The machine below was constructed by Neal Granroth in 1978. According to Neal, “This system has has 1K RAM, 8K ROM, replaces the 5x7 dot-matrix displays with 7-segment displays and provides push buttons to set the Run, Halt, Reset and Load mode. The ROM contains the cassette interface program from the Popular Electronics article, the SCRT utility routines suggested in the RCA CDP1802 Users Manual, and a homebrew keyboard monitor. The empty socket in the upper left hold the 1861 and the video monitor attaches via the phone jack at the top. The system was a great educational tool and provided many hours of ‘computer recreation.’”

© Dave Ruske 2001-2022, except where noted