https://github.com/letmaik/chip8

🕹 CHIP-8 emulator written in AssemblyScript
https://github.com/letmaik/chip8

assemblyscript chip-8-emulator

Last synced: about 2 months ago
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🕹 CHIP-8 emulator written in AssemblyScript

• Host: GitHub
• URL: https://github.com/letmaik/chip8
• Owner: letmaik
• License: mit
• Created: 2020-10-09T22:04:46.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-10-17T21:02:23.000Z (about 4 years ago)
• Last Synced: 2024-10-26T05:08:36.835Z (2 months ago)
• Topics: assemblyscript, chip-8-emulator
• Language: TypeScript
• Homepage: https://letmaik.github.io/chip8/
• Size: 219 KB
• Stars: 5
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# CHIP-8 emulator written in AssemblyScript

https://letmaik.github.io/chip8/

Keys:

```

1 2 3 4

Q W E R

A S D F

Z X C V

```

## CHIP-8 resources

### Docs

https://github.com/mattmikolay/chip-8/wiki/CHIP%E2%80%908-Technical-Reference

http://devernay.free.fr/hacks/chip8/C8TECH10.HTM

### Unit tests

https://github.com/SnoozeTime/chip8/blob/master/test/opcode_test.cc

https://github.com/DavidJowett/chip8-emulator/blob/master/test/chip8_test.c

### Roms

https://github.com/dmatlack/chip8

https://github.com/JohnEarnest/chip8Archive

https://github.com/corax89/chip8-test-rom

## Development notes

### TypedArray views

When AssemblyScript grows heap memory, then all TypedArray views returned to JS become unusable/detached.

That's why a TypedArray view should be accessed directly before it is used in JS, without doing any other work in AssemblyScript that might grow memory. Keeping long-lived views is unsafe in general.

Note that as-bind avoids such potential issues by always returning copies instead of views.

This is less efficient but safer for general usage, though also a bit confusing as it's not obvious that a copy happens. Updating the array inside AssemblyScript would obviously not be reflected in the copy.

See also https://github.com/torch2424/as-bind/issues/47.