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This is my old GameBoy Emulator, please visit DawnGB, my new GameBoy emulator!

Home Page: https://github.com/akatsuki105/dawngb

License: MIT License

Go 97.09% Makefile 2.91%

golang go gameboy gameboy-emulator gbc-emulator gameboy-color emulator gbc emulation

worldwide's Introduction

Caution

This GameBoy emulator project is old and NOT MAINTAINED, please see DawnGB, my new GameBoy emulator project!

🌏 worldwide

日本語のドキュメントはこちら

GameBoyColor emulator written in golang.

This emulator can play a lot of ROMs work without problems and has many features.

🚩 Features & TODO list

🎮 Usage

Download binary from here.

./worldwide "***.gb" # or ***.gbc

🐛 HTTP Server

worldwide contains an HTTP server, and the user can give various instructions to it through HTTP requests.

Please read Server Document.

🔨 Build

For those who want to build from source code.

Requirements

Go 1.16
make

make build                              # If you use Windows, `make build-windows`
./build/darwin-amd64/worldwide "***.gb" # If you use Windows, `./build/windows-amd64/worldwide.exe "***.gb"`

📄 Command

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

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worldwide's Issues

Implement CPU monitor on debug mode

Implement CPU-monitor like BGB on debug-mode.

A CPU usage is measured by halt count in a frame(1/60sec).

Increment cycle in opcode handler

Currently, cycle increments are performed collectively after exiting the opcode handler, but in this case, it is difficult to emulate accurate timing

Inaccurate emulation: Prehistorik Man (USA, Europe).gb

When playing the following ROM:

64f43161eb16eb1be99262c36867bc79  Prehistorik Man (USA, Europe).gb

on commit 86fd56ee2dc9e78e1ed5b408c831230d9a3418ca, I observe two problems:

When the publisher logo appears (TITUS with a fox), the entire picture swings back and forth.

Expected behavior (screenshot from SameBoy): logo waves per-scanline, appearing part by part:

When the title screen appears, the scrolling text is broken, only flickering lines can be seen. The top scanline doesn't scroll its clouds.

Expected behavior:

Unable to build on macOS

I can not build this package on macOS Catalina.

make osx

The error message:

ld: warning: ignoring file /var/folders/f6/hntbqtjx31lflw_4hxp6kjs80000gn/T/go-link-125565020/000000.o, building for macOS-x86_64 but attempting to link with file built for unknown-unsupported file format ( 0x64 0x86 0x01 0x00 0x00 0x00 0x00 0x00 0xB8 0x11 0x00 0x00 0x01 0x00 0x00 0x00 )

$ go version
go version go1.15.3 darwin/amd64

Implementation of automatic test using test ROM

For an accurate emulation implementation, it is necessary to pass the test ROM, so I implement a test to verify that the correct test results match the pixels in the test results with my emulator.

Inaccurate emulation: mooneye-gb tests

Test ROMs source code: https://github.com/Gekkio/mooneye-gb/tree/master/tests/acceptance
Assembled package: https://gekkio.fi/files/mooneye-gb/latest/mooneye-gb_hwtests.zip

I have tried running, from the basic acceptance directory, the following tests:

The ones with the checkbox not marked have failed. div_timing seems to be testing something that some of the other tests implicitly rely on. I did not run the whole test suite as I was only interested in a rough accuracy metric.