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Do-It-Yourself KIT available

A project log for Isetta TTL computer

TTL Retro computer runs 6502 and Z80 code. Has video, sound and filesystem. Runs a Windows-like OS. No microprocessor or FPGA.

roelhroelh 05/21/2025 at 17:450 Comments

KIT Available

The first Isetta kit was successfully built by Vadim (see picture):

And the second kit was built by Hans-Jürgen in Germany.

In [this log] you can see all ins and outs of the kit. Of course, with the kit, you will receive the latest schematics and software versions. [ edit: You can order your kit at the new Envionic website. ]

On the first pcb, a few modifications had to be done (the wires that you see on the pictures). But there is now a new pcb design where these modifications are not needed.

SymbOS

Good progress was made on the SymbOS implementation. The most serious bugs are fixed now. Currently I am working on the microcode for a sound generator, that will work similar to the AY-3-8910, and that can also be controlled by SymbOS. 

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