JavaGameboy
one of Jack's Hacks
by Jack Palevich
This is a Nintendo Gameboy emulator written entirely in Java. It is based on Marat Fayzullin's VGB 0.7 emulator and the Jasper 1.1 Spectrum Sinclair Emulator.
This is the non-commercial
Game Boy ROM SPACE.gb
Controls:
Start makes the sliding door go up and down.
Click on the applet with your mouse to give it focus, and then:
I wrote this over Christmas vacation 1997. I used the Gameboy-specific code from VGB 0.7 and I used the Z80 emulator from the Jasper emulator. I had to hand-translate the VGB code from C to Java.
Java Gameboy is very slow, and it's not very compatible. (For example, I don't think it plays any commercial ROMs.) Most of the bugs were introduced when I converted the C code to Java. Java doesn't have an unsigned byte data type, so I had to make a lot of changes. I bet someone could fix this to work pretty well if they wanted to. Let me know if you make any improvements.
Download classes and Source Code jgb.zip (100K).