Bugfix update vom Gameboy Emulator

6 Antworten zu Bugfix update vom Gameboy Emulator

1. Mat.Alm sagt:

   14. April 2018 um 22:27

   Hi! Thanks for the update… I managed to modify it to build on my system and i turned on gcc compiler optimzations and I can get more than 80 fps with -O3 settings with mbc 1 enabled. For me it seems to have some bugs in some games… Some loads ok but freezes the system. Even with some small games with 32KB the games that I tested that have more than 64KB none of than worked 🙁 Do you plan to add interpolation to get a bigger game screen? Also is possible to adapt nes games to run on it? Load games from sd-card and load than to sdram impact too much on performace?

   Btw nice work!

   Antworten
   • Uwe Becker sagt:

     15. April 2018 um 10:30

     You are right!! The project is developed and tested with „debug“ settings.
     When i switched to „release“ settings tetris is running with 120 fps.
     

     please give me the names of the games that doesn’t work. I try to fix this.
     With 120fps i can easily double the screen size
     (but 144px*2 = 288px doesnt fit in the f746 screen (272px), 16 pixel (8lines) are missing)
     Do you have a bigger screen ?

     Loading from SD-Card is a bigger task, let me first add a a time sync to hit 60 fps
     in „release mode“ (120fps is unplayable 🙂 and a bugfix for your games.

     Uwe

     Antworten
2. Mat.Alm sagt:

   17. April 2018 um 13:48

   Hi! Thanks for reply! No i don’t have a bigger screen Iiuse the F746 disco board… Maybe doing a resize/rescale with a non integer scale can solve the display dimensions problems?
   I also noticed that average fps number can fluctuated a lot from game to game…
   And i will self answer one of my questions : gameboy is Z80 and nes is 6502 so the roms are not compatible.

   Some games that does not worked for me:

   Duck Tales (U) [!] size: 65536 (freezes at nitendo screen but loads game ok)
   Road Rash (U) [M][!] , size: 131072 (loads go to black screen and after freezes)
   Double Dragon (U) [!], size : 131072 (freezes at nitendo screen but loads game ok and opcode error adr : ff47)
   Space Invaders (U) [S][!], size : 524288 (this game loads ok and demos runs but when start playing the game it freezes!)

   Games that worked for me:

   Asteroids (U), size: 32768
   Paperboy (U) [M][!], size : 65536
   Bugs Bunny (U) [!], size : 65536
   Bubble Ghost (U) [!], size: 32768

   Antworten
3. Mat.Alm sagt:

   17. April 2018 um 14:09

   In this link : https://dhole.github.io/post/gameboy_cartridge_emu_2/ contains a implementation of mbc1 emulation. I don’t know if this is the problem maybe it helps…

   Antworten
   • Uwe Becker sagt:

     17. April 2018 um 20:39

     ok, give me a few days…in the meantime you can download version 1.15
     (release version with -O3)
     Use „TAB“ to change screen size
     Use „+/-“ to change emulation speed
     (The fps sync is not that accurate …but good enough for the first shot)

     Antworten
   • Uwe Becker sagt:

     24. April 2018 um 20:48

     finally…version 1.21 is online. (bugfix for games > 32k)
     but „Road Rash“ is still buggy.
     You can now use a sdcard to load games with the limitation:
     put the games into „root“ and only 10 games will be listed.
     (will be changed)

     Antworten