The Atari 2600 VCS

Ophis provides a stella.oph header that names the system's registers to match the documentation in the Stella Programmer's Guide. It also replicates two macros that were widely shared on mailing lists and other tutorial documents at the time Ophis was first released. See the file itself for details.

Atari 2600 ROM images are simple ROM dumps and do not require any more sophisticated organization in the Ophis source files than an .advance directive to pad the output to the appropriate size.

Two sample programs ship with Ophis 2.2; a tiny hello-world program, and a more sophisticated interactive program that explores the system's color palette.