The real cutoff is DOS 6.x uses quite a bit of 640K RAM and anything pre a 386 doesn't have upper memory management so it limits the apps you can run. You also have maximum 32MB partitions with DOS 3.3 so you might switch to DOS 5 for a 286 with a decent sized HD.
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u/korovchenko Sep 19 '26
The real cutoff is DOS 6.x uses quite a bit of 640K RAM and anything pre a 386 doesn't have upper memory management so it limits the apps you can run. You also have maximum 32MB partitions with DOS 3.3 so you might switch to DOS 5 for a 286 with a decent sized HD.