This is a small animated petscii fireplace written in 6502 Assembly (using Kickassembler) on the Commodore 64.
I made it mainly to learn a bit about the C64 and 6502 Assembly so this is most definetly not the most efficient way of doing it
You need to install Kickassembler and run the following command:
java -jar KickAss.jar -odir ./bin entry.asm
(Replace "KickAss.jar" with the path to the assembler)
After compiling you can use VICE to run it:
x64 bin/entry.prg
You should also be able to run it on a real C64 using a Ultimate II+ or recompiling it as a Disk or Tape image (Didn't figure out how to do that).
The Background image was created using Petmate. You can open the PetsciiFireplace.petmate file in Petmate and export a KickAssembler assembly file named fire.asm using Petmates export menu.
The fire generation is hardcoded in assembly by generating random numbers you can change the values in entry.asm at the next: label where the probability for a character, position and color is defined.
The values at the firechars: label define the 8 possible characters that can apper, to extend or shorten this list you have to modify the RandomFireLine macro. Modifying it without changing the length can be done without changing the code.
The speed is defined by the ticktime constant.