This tab allows you to chose the ROM files used in the emulation of the
Atari. These files are not provided with the emulator. To select
the file, press the select button, and the chosen filename will appear in
the text field. By default, files in the OSRoms folder in the Atari800MacX
folder are chosen, with standard names of atariosa.rom, atariosb.rom, atarixl.rom,
ataribas.rom, and a5200.rom.