Commodore64128 / 6502Assembly

Small projects in 6502/6510 assembly targeting the ACME assembler for Commodore 64. This is intended as a reference for more complicated projects.

6502Assembly

Small projects in 6502/6510 assembly targeting the ACME assembler for Commodore 64. This is intended as a reference for more complicated projects.

Setup

You will need to install the ACME assembler and Vice C64 emulator.

On OSX, you can either use Homebrew to install these dependencies, or the DUST command line utility.

Homebrew

Follow instructions at http://brew.sh/ if you do not have Homebrew installed, then:

brew update
brew install acme vice

DUST

Follow instructions at http://dustlayer.com/c64-coding-tutorials/2013/2/10/dust-c64-command-line-tool.

Build

To build and run the project, ensure you have acme, c1541, and x64 on your path.

Run make [project], where [project] is one of:

• helloworld
• ex_interrupts

Projects

There are several tiny projects in this repository, each an exercise in some aspect of programming in assembly for the C64.

helloworld

This project shows how to start a program, store bytes in RAM, clear the screen, show characters on the screen, use registers, loop, and complete a subroutine.

ex_interrupts

This project shows how to disable the various interrupts, enable raster interrupts for a specific line, use the interrupt vector to override the system interrupt subroutine, and define a custom interrupt subroutine.

ex_charset

This project shows how to render tiles consisting of NxN characters, coloured per tile.