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Charles U. Farley
Charles U. Farley
@freakazoid@retro.social  ·  activity timestamp 2 weeks ago

#Isetta might be the perfect #retrocomputing project, at least in terms of architecture and capabilities. It can run #6502 and #Z80 code, has a graphical OS, and can run games with reasonable resolution & number of colors.

The biggest barrier to growing a larger community around it seems to be that all the components are surface mount, which scares a lot of people. One must also source all the parts other than the board, and a separate board is required for programming the flash chips. An assembled version would make it a lot more accessible.

Surface mount is definitely the way to go. It's really not that hard, and it dramatically increases options for parts and allows for a much smaller board.

Something like Isetta in a case with a keyboard, LCD screen, and battery would be awesome. LCD interfaces aren't much different from VGA.

https://hackaday.io/project/190345-isetta-ttl-computer

Isetta TTL computer

This computer is built from simple TTL circuits. There is no microprocessor, microcontroller or FPGA. It can execute 6502 instructions and can on-the-fly switch to Z80 instructions and back. The video has max. 640 x 400 pixel graphics with several colors. It also has on-board file system and sound generator. The prototype is working and runs ZX Spectrum games, 6502 BASIC, and the SymbOS operating system.
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