In 2018 Bram Prosman started with his Junior Computer Revival.
His story and the source of documents and image on his website, check there for updated files
I copied over here his 2.0, 2.1 and 2.2 designs of the basic Junior.
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Memory map Junior Computer |
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1980 04 72 Junior Monitor |
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Junior Computer Monitor Listing |
Junior Computer Monitor Original TASM source
TASM_32 for Windows 10, 64 bit
Version 2.0
Built and tested. Note the design flaws in Version 2.0, read this first!
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Junior Computer Schematics V2.00 |
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Junior Computer PCB BOTTOM V2.00 |
| Junior Computer PCB BOTTOM V2.00 Gerbers |
DISCLAIMER – Please note Bram has not tested yet the V2_1 and V2_2 PCB’s!
Version 2.1 and 2.2
Built and tested. Note the design flaws in Version 2.0, read this first!
Version 2.x added support for smaller push buttons instead of the rare and expensive original used Digitasten.
See also:
History of the TIM in the Jolt
Jolt software
On this page software for the TIM is described.
- DEMON
- Tiny Basic ad Resident Assembler Program
- Focal-65 V3D
...
Images of the Jolt
Above photos by The National Museum of American History.
Photos from https://vinta...
Jolt with a 74154 decoder
The early Jolts were equipped with a 74154 decoder for the glue logic instead of the 74LS00/04/27 of the later and more ...