Using 6510 assembly on the Commodore 64, I am trying to create a stable raster effect. Using the double IRQ principle I draw some raster lines on the screen. I pad with NOPs to match 63 cycles for ...

I'm planning to use software sprites in multicolor char mode for my new C64 project. My idea is to use superimpose 'bullet' sprite data to tile data. I think I can have tileset data at address 'TI...

I am trying to learn 6510 assembly and since I am running Debian xa65 is the assembler I want to use. I have so far written a piece of code that looks like so: *=$0801 .byte $0c, $08, $0a, $00, $...

I know this question is very spesific question but I know there are some c64 code gurus around here. So, here is my question. When I try to disable screen using $d011 trick, upper/lower border als...

Are there any good open source frameworks for developing computer system emulators? I am particularly interested in something written in Python or Java that can reduce the effort involved in develo...