Oh wow! Thanks for those nuggest of info. I didn't know either.
The original author of 386Max made it GPL3 FOSS a couple of years ago. I wish the FreeDOS project had picked it up and incorporated it, but they do not seem interested.
It too won't run on modern hardware in my testing, but since the source is there, presumably it's fixable. The MS-DOS, PC DOS, FreeDOS, and DR DOS memory managers all do run. This suggests to me they are trying to do less "clever stuff".
As for DOSbox -- I don't think this runs a real DOS by default. It's emulating DOS as well as a whole DOS-compatible PC. That makes life easier: if you're faking UMBs and things, then you know exactly where they are and can use them as you wish.
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Oh wow! Thanks for those nuggest of info. I didn't know either.
The original author of 386Max made it GPL3 FOSS a couple of years ago. I wish the FreeDOS project had picked it up and incorporated it, but they do not seem interested.
It too won't run on modern hardware in my testing, but since the source is there, presumably it's fixable. The MS-DOS, PC DOS, FreeDOS, and DR DOS memory managers all do run. This suggests to me they are trying to do less "clever stuff".
As for DOSbox -- I don't think this runs a real DOS by default. It's emulating DOS as well as a whole DOS-compatible PC. That makes life easier: if you're faking UMBs and things, then you know exactly where they are and can use them as you wish.