DOS ain't dead - exFAT in FreeDOS unlikely (but FD fixed 4 GB files)

exFAT in FreeDOS unlikely (but FD fixed 4 GB files) (Developers)

posted by Rugxulo , Usono, 17.03.2009, 00:28

> > EDIT: P.P.S. Eric Auer claims that FreeDOS has now been fixed to support
> 4
> > GB files. (DOS386, tested it yet?)
>
> No it isn't. SVN still reports the last change to kernel was made 9 months
> ago. (Well he said to me that the signed values in SFTs and error reporting
> by using the sign bit of actual values [C-ism] caused it not to support
> larger files so he could probably have fixed it by now.)

Here's what I know:

> > > (Eric): - FREEDOS support 4 GB files (easier than I thought)
>
> > (me): According to DOS386, it already worked, but the int 21h,
> > 73..h (FAT32) funcs didn't work (seeking
>
> (Eric): Not really. FreeDOS treats things as signed and uses negative
> values as error codes, so "classic" seek fails. The fix is to
> redefine a few variables as unsigned and pass error codes via
> separate variables... The int 21.7342 API seems to be EDR-DOS
> specific, a non-standard extension for above 4 GB big files.

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Complete thread:

GetFileSizeEx / Read&Write performance / Wiping - DOS386, 21.12.2007, 03:40 (Developers)
- GetFileSizeEx / Read&Write performance / Wiping - Steve, 21.12.2007, 05:38
- The Death Of FAT32+ - Japheth, 21.12.2007, 07:24
  - --- DEATH --- - DOS386, 21.12.2007, 22:13
    - --- DEATH --- - sol, 21.12.2007, 22:30
      - --- DEATH --- - DOS386, 21.12.2007, 22:46
        --- DEATH --- - Steve, 21.12.2007, 23:22
    - Rest in Peace, Fat32+! No Resurrection possible! - Japheth, 21.12.2007, 23:12
      - -- DEATH -- (anyone has a solution for >4GiB files in DOS ?) - DOS386, 21.12.2007, 23:46
        First get all facts! - Japheth, 22.12.2007, 00:15
        --- DEATH --- - DOS386, 22.12.2007, 00:24
        --- DEATH --- - sol, 22.12.2007, 05:17
        --- DEATH --- - Japheth, 22.12.2007, 09:45
        --- DEATH --- - Steve, 22.12.2007, 10:08
        DOS API extension for files > 4 GB - Japheth, 22.12.2007, 10:28
        --- DEATH --- - sol, 23.12.2007, 23:29
        --- DEATH --- - Matjaz, 24.12.2007, 10:03
        DOS File System efforts - Japheth, 24.12.2007, 17:06
        DOS File System efforts - Rugxulo, 24.12.2007, 19:53
        DOS File System efforts - sol, 25.12.2007, 02:17
        DOS File System efforts - Japheth, 25.12.2007, 09:10
        DOS File System efforts - Rugxulo, 26.12.2007, 21:34
        HPFS for DOS - Rugxulo, 09.09.2008, 22:48
        --- DEATH --- - Japheth, 22.12.2007, 08:57
  - 1 a later, DOS fs enh committee, please report what you got - DOS386, 29.12.2008, 02:41
    - Just noise? - Japheth, 29.12.2008, 08:07
      - NOISE-FS outperforms them all !!! - DOS386, 30.12.2008, 23:06
        NOISE-FS outperforms them all !!! - Japheth, 31.12.2008, 11:46
        NOISE-FS outperforms them all !!! - sol, 02.01.2009, 01:59
        NOISE-FS outperforms them all !!! - Rugxulo, 02.01.2009, 04:25
    - better DOS file system? - Rugxulo, 29.12.2008, 23:16
      - better DOS file system? - ecm, 30.12.2008, 21:48
    - 1 a later, DOS fs enh committee, please report what you got - Steve, 02.01.2009, 07:01
- GetFileSizeEx / Read&Write performance / Wiping - Laaca, 11.01.2009, 14:14
  - exFAT - ecm, 11.01.2009, 17:30
  - GetFileSizeEx / Read&Write performance / Wiping - Rugxulo, 12.01.2009, 19:25
    - GetFileSizeEx / Read&Write performance / Wiping - sol, 15.01.2009, 05:26
      - GetFileSizeEx / Read&Write performance / Wiping - Rugxulo, 15.01.2009, 06:13
        GetFileSizeEx / Read&Write performance / Wiping - sol, 15.01.2009, 06:24
        GetFileSizeEx / Read&Write performance / Wiping - Rugxulo, 16.01.2009, 01:49
        GetFileSizeEx / Read&Write performance / Wiping - sol, 16.01.2009, 07:03
        GetFileSizeEx / Read&Write performance / Wiping - Rugxulo, 18.01.2009, 00:14
        4desasters 4u, DOSsers - DOS386, 24.01.2009, 09:42
        FAT+/FAT/patents - ecm, 24.01.2009, 13:59
        4desasters 4u, DOSsers - Japheth, 24.01.2009, 21:01
        GetFileSizeEx / Read&Write performance / Wiping - Laaca, 14.02.2009, 13:59
        exFAT supported in XP (SP2, SP3) - Rugxulo, 19.02.2009, 02:41
        exFAT supported in XP (SP2, SP3) - Japheth, 20.02.2009, 09:07
        exFAT supported in XP (SP2, SP3) - Laaca, 20.02.2009, 20:16
        exFAT supported in XP (SP2, SP3) - Zyzzle, 21.02.2009, 01:56
        exFAT supported in XP (SP2, SP3) - sol, 21.02.2009, 05:32
        exFAT supported in XP (SP2, SP3) - Rugxulo, 21.02.2009, 05:40
        exFAT supported in XP (SP2, SP3) - Laaca, 21.02.2009, 15:57
        exFAT in FreeDOS unlikely (but FD fixed 4 GB files) - Rugxulo, 15.03.2009, 15:55
        exFAT in FreeDOS unlikely (but FD fixed 4 GB files) - ecm, 15.03.2009, 20:36
        exFAT in FreeDOS unlikely (but FD fixed 4 GB files) - Rugxulo, 17.03.2009, 00:28
        exFAT specification - tom, 17.03.2009, 19:31
        exFAT specification - Laaca, 21.03.2010, 15:42
        former-FAT - DOS386, 22.03.2010, 08:15