From Arwiki

I am using "atari800" for ubuntu.

Here is my startup script:

#!/bin/bash
atari800 -xl -xlxe_rom ATARIXL.ROM -basic_rom ATARIBAS.ROM -basic -nosound -windowed -width 760 -height 536

Atasm stuff

grab the 1.06 source

Edit the Makefile, comment out the current gcc line and uncomment the line in front of it.

run make

sudo cp atasm /usr/bin

AtariAssembler

hello atari

atari programming references

http://www.atariarchives.org/