A portable NES simulator for embedded processors.

• 18-05-2018 PPU performance improvement

  • Add buffers for individual sprites

  • Clean code, remove unused macro switch, i.e. JEG_USE_DIRTY_MATRIX

• 16-05-2018 Add more default roms

  • Add two default roms
    • ROM1: City Tanks
    • ROM2: Road Fighter
    • ROM3: Super Mario Bro
    • ROM4: Contra (Need implementing new mapper)

• 15-05-2018 Add support for STM32F746G-Discovery

  • Add dedicated BSP folders for V2M-MPS2 and STM32F746G-Discovery

  • Add dedicated macro switch to disable FILE-IO

    Disable it so you can port and test the NES emulator with default City Tank rom

• 07-05-2008 PPU improvement

  • Seperate PPU into two versions, one for scanline based and one for partial-scanline based (while another part is pixel based)

  • Apply compact dual pixels to background buffer

    TODO: Fix debug mode

  • Improve the readability

• 05-05-2018 PPU improvement

  • Add background buffer for name tables.

  • Add Dirty Matrix to background buffer refreshing scheme. Only changed tile will be updated.

  • Add debug mode to show background buffer.

  • Gain > 10% performance improvement.

• 03-05-2018 PPU refactory

  • Improve the PPU performance and readabiligy.

  • Add dedicated jeg_cfg.h for configuration purpose.

  • Improve the display quality - solve the blinking-sprite issue.

• 20-04-2018 Support both LiteNES and JEG

  You can switching two emulator in MDK projects:

  • V2M-MPS2-jeg for JEG

    PPU looks good, but 6502 emulation part need to be rewritten. PPU performance could also be improved.

  • V2M-MPS2-LiteNES.

    The performance has been improved. The PPU looks buggy and I decide to not use it any more.

Download the latest version of jeg from https://github.com/semiversus/jeg and unzip all the files under EmbeddedNES\mps2_template\example\jeg folder.

A MDK (https://www.keil.com/demo/eval/arm.htm) project has been provided:

./mps2_template/example/build/mdk

No real hardware is required but you need a professional license (which you can request an 7-days evaluation professional license) to run the Fast Model.

After you open the project with MDK:

*  Compile it 
and 
*  Press the Debug button. 

A Cortex-M7 Fast Model (a.k.a FVP) will be launched. If you don't see anything happened, please make sure "Models Cortex-M Debugger" is selected in the debugger settings by checking following path:

Menu Project->Options for Target->Debug

All the configuration and settings of FVP should be included in this project. If you find nothing, please let me know.

If you are lucky enough to have a MPS2+ board, then you can debug it on the  real hardware. (Currently, it is extremely slow, I am working on it...)


Enjoy.