emu

This repo is ment to hold my attempts at emulating random stuff that I find interesting.

At the moment, there's only an unfinished CHIP-8 implementation.

My goal is to make it a sort of library that can be used to emulate various different CPUs and/or hardware.

CHIP-8

All the CHIP-8 opcodes have been implemented and tested against the CHIP-8 Test Suite.

The CHIP-8 core passes the the following test ROMs:

• 1-chip8-logo.ch8
• 2-ibm-logo.ch8
• 3-corax+.ch8
• 4-flags.ch8

The followings tests are currently skipped because they require functionality that hasn't been implemented yet:

• 5-quirks.ch8
• 6-keypad.ch8
• 7-beep.ch8

Things left to do

• The keyboard opcodes haven't been tested yet.
• The core does not yet handle the sound and delay timers, so that needs a bit of work to get working.
• Based on the previous task, the whole emulation cycle needs to be worked on so it can handle different speeds/frequencies, you could probably just do those manually for now but it would be nicer to have the core handle it, maybe a cycle() function.

References

• Guide to making a CHIP-8 emulator
• Cowgod's CHIP-8 Technical Reference
• CHIP-8 Variant Opcode Table
• and many more... emudev.org