A new Digital Simulation Tool

Using, learning, programming and modding the Gigatron and anything related.
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monsonite
Posts: 50
Joined: 17 May 2018, 07:17

A new Digital Simulation Tool

Post by monsonite » 13 Sep 2019, 15:14

A friend put me onto this new open source digital simulation tool.

https://github.com/hneemann/Digital/releases/tag/v0.23

It's very similar to Logisim which is now no longer supported.

It has an extensive library of TTL devices and memory - so it should be possible to simulate the Gigatron.

I decided to spend a day modeling some of the Gigatron ALU and instruction decoder.

The simulator allows a very slow clock to be applied, and the use of LEDs to indicate the output of the various registers. It's very easy to see the accumulator count up or down - if ADD or SUB has been selected.

Here is the op-code decoder and it's diode ROM. The rest of my simulation models will be placed on my Github repository here:

https://github.com/monsonite/Suite-16/b ... /README.md
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inst_decoder.JPG
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