Ooh, this is exciting…especially since the Apple IIgs I recently acquired has a 65c816, which boots in 6502 emulation mode. =)

Hackaday

6502-assembly-tutorial

Evern wanted to write your own Atari 2600 games? This won’t get you quite that far, but it will teach you the very basics. It’s an assembly tutorial for the 6502 processor. The nice thing is that you need nothing more than your browser to participate thanks to the embedded JavaScript emulator which acts as assembler, machine, and debugger in one.

The 6502 was in a lot of early equipment. In addition to the previously mentioned Atari they can be found in the Commodore 64, Apple II, and the original NES. You can even find folks building their own computers around the chip these days (most notable to us is the Veronica project). The guide starts off slowly, providing a working program and challenging the reader to play with to code in order to alter the outcomes. It moves on to an overview of registers and instructions, operators…

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