Denial

Hi Why would one use C++ to generate 6502 code other than as a proof of concept? ANSI C allows object-oriented programming in a more efficient way (though, slightly less elegant), through: - composition + pointer to structs -> inheritance - pointer to functions -> virtual methods (sub-type polymorph...

@Kweepa, Indeed it is a unique project at least in terms of sheer number of supported systems. The idea is not to just make a massively multi-platform game, but to write some sort of simpe 8-bit framework for all computer/console/handhelds from the 8-bit era. I am also trying to make the game as fun...

I have now managed to get graphics, (minimal) sound an joystick support into the +3k version of my game! I have also managed to create a minimalistic version for the unexpanded Vic 20. Remark: My game now supports about 70 different 8 bit systems (with any 8-bit CPU from the '80s: 6502, Z80, 6809, e...

I may have figure it out! :-) CROSS CHASE with user-defined characers, some sound and joystick support now works on a Vic 20 + 3k! The following config seems to be OK. ... MEMORY { ... MAIN: file = %O, define = yes, start = $040D, size = $1C00 - $40D - __STACKSIZE__, fill=yes; DUMMY: file = %O, star...

Hi!

I have managed to get UDG with +3k. I can only redefine the first 20 characters, though.

I wonder whether this is the expected behavior.

Fabrizio

If I use Vice monitor and look at $1C00, I only find $00, which means that the linker did not do what I was expecting.

A similar cfg file works fine with the 8k and 16k configuration... No idea what is wrong.

I think I am close to get UDG into my game for the Vic20+3k but I do not see the UDG on the srceen. I am trying to get 64 UDG and 6k of available ram for code and data. The screen starts at $1E00 (7680). If I write into $1E00, I do see the characters but not the user-defined characters. I am not sur...

Thanks Mike! CROSS CHASE already supports UDG in +8k and +16k Vic20 versions (CROSS CHASE is a game for *all* 8 bit computer/consoles/handhelds). The VERY SAME C CODE is used for all computers/consoles except for the hardware-specific code in some cases. The game has 3 versions (generated also by th...

Thanks! I will need slightly more than 6k. My game currently takes 6430 bytes. Maybe I could optimize it a little bit more and make it fit in about 6000. The game is CROSS CHASE in its Vic20 + 3k version, which I write in C for any 8 bit computer/console/handheld. How do I fix the char memory and sc...

Hi

Where to place user-defined graphics/characters on a Vic20+3k while possibly having all or most of the ram for the code in a
contiguous block?

Fabrizio

Hi everyone, I could figure out what was wrong in the cfg... I had a hole where the stack is supposed to be. This has been fixed with the DUMMY memory area: " ... MEMORY { ZP: file = "", define = yes, start = $0002, size = $001A; SCREEN: start = $1000, size = $0200; LOADADDR: file = %...

Further progress after fixing a linker configuration issue

I have (almost) been able to add UDG to the Vic 20 versions by using a slightly modified version of @beamrider's CFG for the Vic20 + 8k and Vic20 + 16k versions of my game. What is broken when using this configutation is that the stack is placed somewhere in memory where it conflicts with graphics m...

NEW UPDATES

I managed to add some initial graphics to the Vic 20 + 8k and Vic 20 + 16k versions of CROSS CHASE!

You can grab these latest versions at the project's GitHub page:

https://github.com/Fabrizio-Caruso/CROSS-CHASE/releases

Hi everyone! This is just to remind you that my universal 8 bit game CROSS CHASE https://github.com/Fabrizio-Caruso/CROSS-CHASE/releases now supports 60 different computers/consoles/handhelds including THREE Vic 20 configurations: - Vic 20 + 3k (tiny version of the game: just the essentials) - Vic 2...