ReMiMo

A 16-bit hardwired CPU built in Logisim Evolution.

It's based on MiniMiMo, which is based on Warren Toomey's "An Example Hardwired CPU".

CPU documentation

• Architecture
• Instruction table

MImo Assembler

The most scuffed assembler ever!?

Usage

To assemble a Logisim RAM image run:

node mia.js source.mia output.out --raw

When assembling for the emulator use the --raw flag to spit out a binary file instead.

node mia.js source.mia output.out --raw

For example programs see the mia/test directory.

Remimo EMulator

Since Logisim only runs at about 120Hz (60 IPS) I wrote a faster emulator (more than 300000x faster). The index.ts is a simple IO-less benchmark that loads a file and mesures executed instructions per second.

Extending / porting

The remimo.ts file is the portable emulator core. To implement memory mapped IO wrap a UInt16Array with a custom getter/setter.