At 07:38 PM 5/4/97 -0500, you wrote: Sam, Just in case you're interested, I do have the original Corona-specific versions of MS-DOS for their machines, both 1.25 and 2.11. I would think you'd be able to boot it with just about any 5-1/4" boot disk though, as I know of someone that got a new Pentium to boot with the Corona 2.11 disk, so there doesn't seem to be anything odd in the bios calls at boot up. There do appear to be some Corona-specific utilities on them though. Jeff jeffh(a)eleventh.com ---------------------------------------------------------------------------- ------- Collector of Classic Computers: Amiga 1000, Amiga 3000, Atari 800, Atari 800XL, Atari MegaST-2, Commodore C-128, Commodore Plus/4, Commodore VIC-20, Kaypro 2X, Mattel Aquarius, Osbourne Executive, Timex-Sinclair 1000, TRS-80 Color Computer 3, TRS-80 Model IV Plus Atari SuperPong and Atari 2600VCS game consoles