DOS ain't dead - the DOS code segment hunt, results/questions

the DOS code segment hunt, results/questions (Miscellaneous)

posted by Ninho , 30.12.2009, 10:50

>> hook int 2Fh and call
>> a DOS function that you know will call a particular case of int 2Fh.
>> ...One that
>> comes to mind is that int 21h function 0Dh always finishes by calling int
>> 2Fh function 1120h - but there's surely a better one than that.

A good one (that doesn't cause disk activity!) might be :

int 21/3801h will call int 2F/14xx provided the country code (in BX) is different than the current country code.

I'll be using that in a FIXWrap revision...

---
Ninho

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Complete thread:

new HACKWRAP fix for MS-DOS7+, aka smashing the bug - Ninho, 11.12.2009, 00:17 (Miscellaneous)
- new HACKWRAP fix for MS-DOS7+, aka smashing the bug - ecm, 11.12.2009, 15:02
  - new *FIXWRAP* for MS-DOS7+, aka smashing the bug - Ninho, 12.12.2009, 01:12
- FIXWRAP technical thread. News - Ninho, 12.12.2009, 16:05
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      - CM's questions, answered - Ninho, 13.12.2009, 00:10
        CM's questions, answered - ecm, 13.12.2009, 00:51
        CM's questions, answered - Ninho, 13.12.2009, 10:32
    - CM's questions, answered - geoffchappell, 14.12.2009, 10:42
      - CM's questions, answered - Ninho, 14.12.2009, 12:19
- new HACKWRAP fix for MS-DOS7+, aka smashing the bug - geoffchappell, 14.12.2009, 10:41
  - new HACKWRAP fix for MS-DOS7+, aka smashing the bug - Ninho, 14.12.2009, 11:49
    - new HACKWRAP fix for MS-DOS7+, aka smashing the bug - geoffchappell, 15.12.2009, 16:55
      - new HACKWRAP fix for MS-DOS7+, aka smashing the bug - Ninho, 15.12.2009, 19:08
      - new HACKWRAP fix for MS-DOS7+, aka smashing the bug - Ninho, 17.12.2009, 16:35
- the DOS code segment hunt, results/questions - Ninho, 14.12.2009, 20:37
  - the DOS code segment hunt, results/questions - ecm, 14.12.2009, 23:30
    - the DOS code segment hunt, results/questions - Ninho, 15.12.2009, 00:59
    - Aha! Share was a *red herring* ! Hunt over !!! - Ninho, 15.12.2009, 10:32
      - Aha! Share was a *red herring* ! Hunt over !!! - ecm, 15.12.2009, 21:13
        Aha! Share was a *red herring* ! Hunt over !!! - Ninho, 15.12.2009, 22:32
        Aha! Share was a *red herring* ! Hunt over !!! - ecm, 15.12.2009, 23:05
    - the DOS code segment hunt, results/questions - geoffchappell, 15.12.2009, 16:56
      - the DOS code segment hunt, results/questions - ecm, 15.12.2009, 21:19
        the DOS code segment hunt, results/questions - Ninho, 15.12.2009, 22:38
        the DOS code segment hunt, results/questions - ecm, 15.12.2009, 23:06
        the DOS code segment hunt, results/questions - Ninho, 16.12.2009, 09:22
      - the DOS code segment hunt, results/questions - Ninho, 16.12.2009, 20:24
        the DOS code segment hunt, results/questions - Ninho, 30.12.2009, 10:50
  - the algorithm, sketched for review. Nitpicks ? - Ninho, 16.12.2009, 19:51
    - the algorithm, sketched for review. Nitpicks ? - ecm, 17.12.2009, 16:19
      - the algorithm, sketched for review. Nitpicks ? - Ninho, 17.12.2009, 17:14
        the algorithm, sketched for review. Nitpicks ? - ecm, 17.12.2009, 20:32
        the algorithm, sketched for review. Nitpicks ? - Ninho, 17.12.2009, 21:05
        the algorithm, sketched for review. Nitpicks ? - ecm, 17.12.2009, 21:13
        the algorithm, sketched for review. Nitpicks ? - Ninho, 17.12.2009, 23:16
        digression : MSDOS 7 and SHARE.EXE revisited - Ninho, 18.12.2009, 13:04
        digression : MSDOS 7 and SHARE.EXE revisited - ecm, 18.12.2009, 14:31
        digression : MSDOS 7 and SHARE.EXE revisited - Ninho, 18.12.2009, 17:19
        digression : MSDOS 7 and SHARE.EXE revisited - ecm, 18.12.2009, 18:19
        digression : MSDOS 7 and SHARE.EXE revisited - Ninho, 18.12.2009, 18:55
- HACKWRAP.SYS news, testing - Ninho, 20.12.2009, 02:44
  - FIXWRAP.SYS 0.5 beta - released - please try it ! - Ninho, 23.12.2009, 00:07