TRS-80''s more advanced TRSDOS
Emulation of the TRS-80's more advanced TRSDOS [ TRS-80 Disk Operating System that from the Radio Shack TRSDOS manual, I myself thought TRS was Tandy Radio Shack]. It was more powerful and had more features than the built-in ROM. It included Disk Basic which was more powerful than Level 2 Basic in the ROM shown below.
