gopher-boy

　　　　

Installation

you can install gopher-boy with following comand.

go get github.com/bokuweb/gopher-boy/cmd/gopher-boy

This emulator uses the go library pixel, which requires OpenGL. You may need to install some requirements which can be found on the pixels readme.

Requirements

• go1.12.7

Development

Native

GO111MODULE=on go run -tags="native" cmd/gopher-boy/main.go hello.gb

WebAssembly

make build-wasm
make serve

Usage

gopher-boy YOUR_GAMEBOY_ROM.gb

Keymap

keyboard	game pad
←	← button
↑	↑ button
↓	↓ button
→	→ button
Z	A button
X	B button
Enter	Start button
Backspace	Select button

Testing

make test

Current status

Blargg's test ROM

ROM	Result
cpu_instrs	✅
instr_timing	❌ (#255)

mooneye-gb's test ROM

ROM	Result
emulator-only/mbc1/bits_bank1	✅
acceptance/instr/daa	✅
acceptance/timer/div_write	✅
acceptance/timer/tim00	✅
acceptance/timer/tim01	✅
acceptance/timer/tim10	✅
acceptance/timer/tim11	✅
acceptance/if_ie_registers	✅

Visual regression test

Please install reg-cli.

npm i -g reg-cli

Execute regression test

make reg

Update expected images

make reg-update

Credit

"gopher" by Renée French CC-BY-3.0

Known Bugs and TODO list

PR welcome :)

• Implement APU
• Support scale option
• Support WebAssembly
• 8*16 sprite
• LCD interrupt
• Keypad interrupt
• cartridges
  • Support ROM+MBC1+RAM+BATT catridge
  • Support ROM+MBC2 catridge
  • Support ROM+MBC2+BATTERY catridge
  • Support ROM+RAM catridge
  • Support ROM+RAM+BATTERY catridge
  • Support ROM+MMM01 catridge
  • Support ROM+MMM01+SRAM catridge
  • Support ROM+MMM01+SRAM+BATT catridge
  • Support ROM+MBC3+RAM catridge
  • Support ROM+MBC3+RAM+BATT catridge
  • Support ROM+MBC5 catridge
  • Support ROM+MBC5+RAM catridge
  • Support ROM+MBC5+RAM+BATT catridge
  • Support ROM+MBC5+RUMBLE catridge
  • Support ROM+MBC5+RUMBLE+SRAM catridge
  • Support ROM+MBC5+RUMBLE+SRAM+BATT catridge
  • Support Pocket Camera catridge
  • Support Bandai TAMA5 catridge
  • Support Hudson HuC-3 catridge