DOS ain't dead - Signed Seeking System Operation

Signed Seeking System Operation - SSSO ? (DOSX)

posted by ecm , Düsseldorf, Germany, 05.05.2009, 17:52

> preventing stupid apps or compilers to seek below zero, while DOS is too
> stupid too to reject such no-goes

This is not a bug, it's a feature. Seeking "below zero" actually wraps around to a high position, so -1 means 4 GiB less one byte. It's all about "signed" and unsigned values.

---
l

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Complete thread:

Bugs in HX / DKRNL32 (FFMPEG, MPLAYER, MediaInfo) - DOS386, 18.04.2009, 10:55 (DOSX)
- Bugs in HX / DKRNL32 (FFMPEG, MPLAYER, MediaInfo) - Japheth, 23.04.2009, 08:08
  - GSGO - good source, garbage output vs Fabrice Bellard - DOS386, 26.04.2009, 02:34
    - GSGO - good source, garbage output vs Fabrice Bellard - Japheth, 26.04.2009, 08:00
      - HX is dead :-( ............. ---> R.I.P. <--- - DOS386, 27.04.2009, 10:03
        HX is dead :-( ............. ---> R.I.P. <--- - Khusraw, 27.04.2009, 10:12
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - DOS386, 27.04.2009, 10:16
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Khusraw, 27.04.2009, 10:41
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Zyzzle, 01.05.2009, 00:29
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Khusraw, 01.05.2009, 00:55
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Laaca, 01.05.2009, 08:34
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Khusraw, 01.05.2009, 10:39
        HX is dead :-( ............. ---> R.I.P. <--- | Mik's page - Laaca, 01.05.2009, 14:16
        HX is dead :-( ............. ---> R.I.P. <--- - Japheth, 27.04.2009, 11:28
        FFMPEGxxxx on HX: spectacular progress in BUG-fixing - DOS386, 27.04.2009, 14:50
        FFMPEGxxxx on HX: spectacular progress in BUG-fixing - rr, 28.04.2009, 20:24
        FFMPEGxxxx on HX: spectacular progress in BUG-fixing - Japheth, 29.04.2009, 08:31
        FFMPEG on HX: imbecility on both sides | MinGW garbage I/O - DOS386, 05.05.2009, 14:23
        Signed Seeking System Operation - SSSO ? - ecm, 05.05.2009, 17:52
        Signed Seeking System Operation - SSSO ? - DOS386, 06.05.2009, 05:39
        FFMPEG on HX: imbecility on both sides | MinGW garbage I/O - Japheth, 05.05.2009, 21:18
        Debug version of DKRNL32 | NMAKEUP | Linker - DOS386, 06.05.2009, 05:33
        Debug version of DKRNL32 | NMAKEUP | Linker - Japheth, 06.05.2009, 07:09
        Debug version of DKRNL32 | NMAKEUP | Linker | HX 2.15 - DOS386, 09.05.2009, 08:57
        Debug version of DKRNL32 | NMAKEUP | Linker - Rugxulo, 10.05.2009, 03:34
        Why there are some hurdles... - Japheth, 10.05.2009, 07:38
        Why there are some "pure Dampfplauderers" ... - DOS386, 23.05.2009, 02:10
        Why there are some "pure Dampfplauderers" ... - rr, 23.05.2009, 18:28
        Why there are some "pure Dampfplauderers" ... - marcov, 25.05.2009, 14:54
        origin_type=$0001'0000 | The chief DAMPFPFLAUDERER fixed it - DOS386, 23.05.2009, 10:24
        origin_type=$0001'0000 | The chief DAMPFPFLAUDERER fixed it - Japheth, 24.05.2009, 22:36
    - GSGO - good source, garbage output vs Fabrice Bellard - Laaca, 26.04.2009, 09:43