3 ms·
I think the DR-DOS variants of DOS did? I also believe that OS/2 did as well. I broadly agree with everything you said though.
by tombert 2y ago
I think the DR-DOS variants of DOS did? I also believe that OS/2 did as well.
I broadly agree with everything you said though.
- sydbarrett74 2y agoOS/2 1.x supported memory protection for apps targeted for OS/2. Since 1.x was written for the 286, it put all MS-DOS apps in the same address space, so one errant app could bring down the whole MS-DOS subsystem. It would take OS/2 2.0 to exploit the 386's Virtual 8086 mode, which allowed each MS-DOS app to run isolated.
- Gormo 2y agoAll varieties of DOS supported protected memory from the early '90s onward, using the DPMI spec.