I would like to add some very simple sound effects in my games but I have no idea how to do it. CC65 exposes some BIOS functions that should produce some sounds but it is not clear at all to me how they are use. For example _bios_playsound: https://github.com/cc65/cc65/blob/master/libsrc/creativisio...

Cross Horde is the fifth "universal" 8-bit game that I have written with my framework Cross-Lib https://github.com/Fabrizio-Caruso/CROSS-LIB Thanks to Cross-Lib I can build my games for about 200 systems including the Creativision. A video of the gameplay on the Creativision is in: https://youtu.be/...

Thanks! It looks good! Is it too hard? too fast? You can also shoot at the enemies and missile bases if we catch the gun item. The game has 10 items. Some of the items are secret and can be unlocked by some actions you can do with the gun (kill/hit the skull, destroy (multiple) missile bases). The g...

So, if I create a cartridge image, I need to swap the 2 16kb blocks, i.e., the higher block should come before the lower one. When I try to load such a cartridge I get an error in Mame/Mess about its size: Fatal error: Device CreatiVision Cartridge Slot load failed: Image extends beyond the expected...

Thanks Scouter3d for your test! Is the flickering caused by my game code? In Mame/Mess I hear an annoying sound. (The game has no sound, yet). I cannot really see which version of the game you are testing. Cross Chase latest version has some graphics and colors. I have just updated it at: https://gi...

Hi everyone, what structure do emulators (such as Mame or Mess) conventionally expect for 18k and bigger rom images? For 16k I know I need to invert the two 8k blocks. What should I do for 18k images? and for bigger images? What is the maximum size I can have on an emulator and or real hardware equi...

Hi everyone! I have written a second game for the Creativision. I need someone to test it and also test the first game. Both games are universal 8-bit games written with CrossLib (https://github.com/Fabrizio-Caruso/CROSS-CHASE/). They are mass-compiled into 200 versions for nearly all 8-bit computer...

Thanks!

How are the 18k roms mapped in ram? How are 18k rom files structure?

I have figure this out and I have managed to implement some graphics in my game!