jgb

gameboy emulator written in JS

Development

$ git clone https://github.com/leandromoreira/jgb.git
$ cd jbg
$ open SpecRunner.html #to run all the tests.

Technical specs

  CPU          - 8-bit (Similar to the Z80 processor)
  Clock Speed  - 4.194304MHz (4.295454MHz for SGB, max. 8.4MHz for CGB)
  Work RAM     - 8K Byte (32K Byte for CGB)
  Video RAM    - 8K Byte (16K Byte for CGB)
  Screen Size  - 2.6"
  Resolution   - 160x144 (20x18 tiles)
  Max sprites  - Max 40 per screen, 10 per line
  Sprite sizes - 8x8 or 8x16
  Palettes     - 1x4 BG, 2x3 OBJ (for CGB: 8x4 BG, 8x3 OBJ)
  Colors       - 4 grayshades (32768 colors for CGB)
  Horiz Sync   - 9198 KHz (9420 KHz for SGB)
  Vert Sync    - 59.73 Hz (61.17 Hz for SGB)
  Sound        - 4 channels with stereo sound
  Power        - DC6V 0.7W (DC3V 0.7W for GB Pocket, DC3V 0.6W for CGB)

References

• Nocash gb hardware documentation.
• Complete documentation (pdf)
• Cpu LR35902 opcodes
• Tech demos/roms with source code.
• General demos and gb development soft/hard.