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zacchaeus

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KiCad projectAll 402 files, ready to open in KiCad28 MB
For fabricationGerbers, drill, pick-and-place and BOMGerbers and drill zip269 KBGerbers and drill zip: pbkp13 KBGerbers and drill zip: pcox97 KBGerbers and drill zip: pemx178 KBGerbers and drill zip: pfrp13 KBGerbers and drill zip: pioi97 KBGerbers and drill zip: pman-dp49 KBGerbers and drill zip: pman-if82 KBGerbers and drill zip: pman-sw88 KBGerbers and drill zip: ppow58 KBGerbers and drill zip: pspk31 KBGerbers and drill zip: ptap13 KBPick and place (CSV)36 KBPick and place (CSV): pbkp35 BPick and place (CSV): pcox4.9 KBPick and place (CSV): pemx7.2 KBPick and place (CSV): pfrp35 BPick and place (CSV): pioi6.6 KBPick and place (CSV): pman-dp1.8 KBPick and place (CSV): pman-if3.2 KBPick and place (CSV): pman-sw5.8 KBPick and place (CSV): ppow4.8 KBPick and place (CSV): pspk1.1 KBPick and place (CSV): ptap35 BBOM CSV43 KB
Schematic PDFEvery sheet, to read or print229 KB
3D modelThe board with its parts, for an enclosure (GLB)3D model (GLB)1.7 MB3D model (GLB): pcox11 MB3D model (GLB): pemx24 MB3D model (GLB): pioi6.6 MB3D model (GLB): pman-if16 MB3D model (GLB): pman-sw6.3 MB3D model (GLB): ppow4.1 MB
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README

Zacchaeus Microcomputer

8-bit microcomputer built from commercially available and home-built components

This project is a personal journey back in time to the heroic age of computing: a newly built, classic 8-bit system, in which I supplement the factory components with modules of my own design. My goal is to revive the joy of discovery, while on this new machine, legendary languages ​such as BASIC, Fortran or Cobol come to life again.

The computer is built on a motherboard based on the Z180 processor and expansion cards designed by Stephen C. Cousins. These component descriptions are provided for completeness and represent the versions available at the time of use. For more detailed descriptions and the latest updates, please visit the original author's website (Small Computer Central). These components are licensed as open source and public domain.

These components are complemented by custom-designed expansion cards and external peripherals. The custom-designed software are licensed as open source and hardware are licensed as public domain.

A detailed description of the computer can be found in the Zacchaeus computer folder.

External interface box

PEIX is an 8-slot interface connecting legacy Klöckner-Moeller PS316 I/O modules to the Zacchaeus computer via RS-232 serial line with SCRAP protocol. It restores functionality to these obsolete analog and digital modules.

A detailed description of the interface box can be found in the PEIX External interface box folder.

External memory box (EPROM bank)

PEMX is an 8-slot external EPROM bank connected via two PIO ports. It supports 2764 through 27512 EPROMs, including 'A' and CMOS variants with raw data and lowFAT filesystem.

A detailed description of the memory box can be found in the PEMX External memory box folder.

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