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rcl9 / Cypher-Z80-68000-Single-Board-Computer-1984-by-Motel-Computers---History-and-Documentation

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This repository strives to provide a historical snapshot, archive and description of the short lived Cypher Z80/68000 single board computer which was designed, built and sold by Motel Computers of Willowdale Ontario.

firmware assembly z80 retrocomputing sbc cpm 16-bit 68000 retro-computing vintage-computers single-board-computer motel-computers 68000-processor z80-processor sbcomputer cypher-computer cypher-z80-68000 cypher-single-board-computer cypher-computer-history motel-computers-history
  • Updated Jan 20, 2026

rcl9 / Integration-of-the-1983-DRC-Light-Speed-100-RAMdisk-S100-Board-With-Exidy-Sorcerer-CPM-2.2

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A historical and archival overview of the 1983-era "Light Speed 100" (LS-100) 256k S-100 RAMdisk board produced by Digital Research Computers

homebrew hardware assembly retrocomputing ramdisk cpm retro-computing electronics-projects sorcerer 8-bits vintage-computers z80-assembly exidy-sorcerer z80-processor sorcerer-computer ls100-ramdisk lightspeed-100 digital-research-computers s100-board s100-ramdisk
  • Updated Feb 16, 2026
  • Assembly

rcl9 / Hex-File-Overlayer-of-CPM-Sysgen-Image

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This repo provides a useful command line utility program to overlay Intel HEX files ( the boot code, the CCP, BDOS and/or CBIOS) on top of a pre-existing CP/M 2.2 SYSGEN image file.

homebrew retrocomputing cpm retroprogramming cpm22 sysgen retro-computing sorcerer 8-bits vintage-computers z80-assembly exidy-sorcerer z80-processor intel-hex-file hex-file-overlay-tool cpm-sysgen cpm-sysgen-tool image-overlay-tool-for-cpm hex-file-to-sysgen-tool
  • Updated Feb 9, 2026
  • C++

rcl9 / Morrow-DJ2D-CPM-22-Recompile-From-Source

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This repo documents how to rebuild a CP/M 2.2 "SYSGEN" image, from scratch, for the Morrow DISK JOCKEY 2D S-100 8" floppy disk drive controller card. I

z80 retrocomputing sol cpm retroprogramming cpm22 retro-computing vintage-computers z80-assembly morrow z80-processor 8080-assembly diskjockey-2d morrow-diskjockey cpm22-for-dj2d morrow-dj2d cpm-rebuild cpm22-recompile cpm-recompile sol-computer
  • Updated Feb 9, 2026
  • Assembly

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