OSS 4-in-1 Programming Cartridge
BASIC XL, XE, Action! and MAC/65
I already own the OSS Action! and BASIC XL cartridges, but never had the MAC/65 assembler and I no longer have the BASIC XE cartridge that I owned in the 80s1. These all are pretty difficult to find and can be expensive when they show up.
Technically you don’t need the cartridge at all since there are now images available for these things, but I like cart…