/* Imported from Wayback Machine
   Original URL : https://www.retrobrewcomputers.org/doku.php?id=builderpages:plasmo:zx79
   Snapshot date: 2026-03-12
   Generator    : wayback-archiver
*/

==== Table of Contents ====

[[#orton_zx79_the_most_minimal_z80_computer|Orton ZX79, The Most Minimal Z80 Computer]]

[[#introduction|Introduction]]

[[#features|Features]]

[[#design_information|Design Information]]

[[#design_information_provided_by_k_orton|Design Information provided by K. Orton]]

[[#zx79_captured_with_ivex_pc_board_tools|ZX79 captured with IVEX PC board tools]]

====== Orton ZX79, The Most Minimal Z80 Computer ======

===== Introduction =====

Karen Orton introduced her ZX79 in a post in Retrobrewcomputers forum: [[forum:index.php|[[forum:index.php]] It is a Z80 computer with screen and keyboard using 10 IC's of 1980's technology. It was inspired by Sinclair ZX80.

===== Features =====

===== Design Information =====

==== Design Information provided by K. Orton ====

ZX79 [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zx79:orton_zx79_computer_manual.pdf|Manual]]

ZX79 [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zx79:zx79.asm|Assembly]]

ZX79 [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zx79:rommap.zip|Memory map]]

==== ZX79 captured with IVEX PC board tools ====

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zx79:zx79_r0_scm.pdf|Schematic]]

Gerber [[https://www.retrobrewcomputers.org/lib/exe/fetch.php?media=builderpages:plasmo:zx79:zx79_r0.zip|Photoplots]]

[[https://www.retrobrewcomputers.org/lib/exe/fetch.php?tok=0d3d42&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fzx79%2Fzx79_r0_jlcpcb_2-22-20.png|{{https://www.retrobrewcomputers.org/lib/exe/fetch.php?w=500&h=500&tok=f97d3a&media=https%3A%2F%2Fwww.retrobrewcomputers.org%2Flib%2Fplugins%2Fckgedit%2Ffckeditor%2Fuserfiles%2Fimage%2Fbuilderpages%2Fplasmo%2Fzx79%2Fzx79_r0_jlcpcb_2-22-20.png?500x500}}]]