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 [ 3 posts ] 
 Building a simple TTA computer (MOV-only machine) 
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Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1789
A blog post:
Weird CPU architectures, the MOV only CPU
I decided to build the computer in Digital, a simulator for digital logic that is based on Logisim but much improved. Just the name is a bit too common when googling :)

In order to make a simple TTA computer, a few things are needed.

    A CPU capable of moving data
    A program counter
    An ALU
    A branch block
I want the CPU to be a von Neumann type of CPU, meaning that there is one memory bus with code to execute and RAM. To have a useable amount of memory, a 16 bit address, in order to address 64KB of RAM, is probably nice. Let’s just make it a 16 bit CPU when we are busy.

Sun Sep 13, 2020 9:54 am

Joined: Wed Nov 20, 2019 12:56 pm
Posts: 92
Interesting stuff!

A little over a year ago I watched this video about how the x86 MOV instruction is turing complete:

In a roundabout way, this was the video that set me to thinking about small instruction sets, and ultimately led to me creating EightThirtyTwo.

Mon Sep 14, 2020 5:45 pm

Joined: Mon Oct 07, 2019 2:41 am
Posts: 613
A simple LISP machine I can see about as complex as move machines.
The alu could have just incriment,decriment and compare.
The rest is just testing for atoms or moving pointers around.
I remeber reading once a design of a simple lisp cpu chip (1975?), and this reminded
me of it.

Mon Sep 14, 2020 8:29 pm
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