DOS ain't dead

Phil Gardner's Wrapper.sys & MS-DOS7 bug (Miscellaneous)

posted by Ninho , 20.11.2009, 12:27

> You'd either have to actually patch DOS (i.e. modify its code), or hook
> Int21 and take over anything DOS does when terminating a PSP TSR. Both
> requires knowledge about DOS's internal operation, although I'd prefer the
> second method because that depends less on DOS's code.
>
> If you adapt either of these methods or the one presented by Geoff
> Chappel, please replace his version check by something dependable (such as
> exact kernel code pieces if you're going to patch code anyway). Other DOS
> versions report "true version" (Int21.3306) 7.00+ now too (because many
> programs depend on that to check for other things such as FAT32 support)
> but they probably don't support the TSR list pointer in the DOS data
> segment. The presented CRT's initialization code depends on this pointer
> (with a fixed offset) if the reported true version is 7.00 or higher.

Good points, thanks. The version checking issue is real but IMO cosmetic. If I were to undertake something around that bug, I think I would not try to update Gardner's driver for obvious ethical and legal reasons. OTOH redoing a comparable program in the clean room is much work considering the lack of people's interest for DOS nowadays. Repairing DOS could be a better option and a reusable one. However distributing a patch for MS-DOS as such would present more legal (not ethical!) problems.

Anyhoo... I don't even know why I even go into these considerations. I would gladly use one if I had it, but there are close to 0% chances I'll ever let me involved in this programming. The choleric personality over there is right, I must be lazy.

Cheers

---
Ninho

Complete thread:

• Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 18.11.2009, 20:41 (Miscellaneous)
  • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Rugxulo, 18.11.2009, 23:00
    • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 18.11.2009, 23:30
  • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 19.11.2009, 07:18
    • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 19.11.2009, 11:32
      • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 19.11.2009, 12:54
      • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 19.11.2009, 16:29
        • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 19.11.2009, 18:22
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - ecm, 19.11.2009, 18:52
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 20.11.2009, 12:27
              • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 20.11.2009, 12:56
                • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Rugxulo, 22.11.2009, 01:08
                • Phil Gardner's Wrapper.sys & MS-DOS7 bug - rr, 22.11.2009, 19:50
                  • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 22.11.2009, 20:17
            • Re MS-DOS7 bug, Patch done! available soon :=) - Ninho, 23.11.2009, 23:26
              • Re MS-DOS7 bug, Patch done! available soon :=) - ecm, 24.11.2009, 15:03
                • Re MS-DOS7 bug, Patch done! available soon :=) - Ninho, 24.11.2009, 18:10
                  • Re MS-DOS7 bug, Patch done! available soon :=) - ecm, 24.11.2009, 23:11
                    • Re MS-DOS7 bug, Patch done! available soon :=) - Ninho, 25.11.2009, 00:36
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 19.11.2009, 19:16
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 19.11.2009, 23:48
              • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 20.11.2009, 08:29
                • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 20.11.2009, 09:59
                  • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Khusraw, 20.11.2009, 10:43
                    • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 20.11.2009, 12:00
  • *beta* Patch available ! - Ninho, 25.11.2009, 22:01
    • *beta* Patch available ! - ecm, 25.11.2009, 22:17
      • *beta* Patch available ! - Ninho, 26.11.2009, 00:02
        • *beta* Patch available ! - ecm, 26.11.2009, 15:04
          • *beta* Patch available ! - Ninho, 26.11.2009, 17:33
  • Phil Gardner's Wrapper.sys & MS-DOS7 bug - rr, 09.12.2009, 22:50
    • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 10.12.2009, 13:11
      • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 11.12.2009, 17:12
        • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 12.12.2009, 01:04
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 12.12.2009, 10:57
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Ninho, 12.12.2009, 11:50
    • Phil Gardner's Wrapper.sys & MS-DOS7 bug - ecm, 10.12.2009, 15:56
      • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Rugxulo, 11.12.2009, 07:14
        • Phil Gardner's Wrapper.sys & MS-DOS7 bug - ecm, 11.12.2009, 16:02
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Rugxulo, 11.12.2009, 19:42
        • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 12.12.2009, 11:08
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Arjay, 12.12.2009, 11:34
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Rugxulo, 12.12.2009, 12:03
              • Phil Gardner's Wrapper.sys & MS-DOS7 bug - Arjay, 12.12.2009, 12:25
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 14.12.2009, 08:28
      • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 11.12.2009, 17:14
        • Phil Gardner's Wrapper.sys & MS-DOS7 bug - ecm, 11.12.2009, 18:21
          • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 12.12.2009, 10:56
            • Phil Gardner's Wrapper.sys & MS-DOS7 bug - ecm, 12.12.2009, 11:48
              • Phil Gardner's Wrapper.sys & MS-DOS7 bug - geoffchappell, 14.12.2009, 08:29