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kernel
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Fix bug 1819 by setting FAT32 fields of FAT12/16 DPBs on Int21/7302 

git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/branches/UNSTABLE@1068 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Luchezar Georgiev 2004-12-02 18:03:35 +00:00
parent 45e35f46cf
commit b50bf0f0e7
2 changed files with 15 additions and 0 deletions
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3
docs/history.txt
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@ -5,6 +5,8 @@
- bugfix: call_nls: DI register was not preserved
* exeflat.c
- new version exploiting better UPX compression for SYS files; calls UPX itself
* inthndlr.c
- int21/ah=6/dl=ff now calls int28
+ Changes Tom
* inthndlr.c
- improve handling of case where eg. FindFirst(I:\*.*) fails, causes Int24,
@ -309,6 +311,7 @@
- set AX = ES after Int 21h/4Ah (undocumented but expected by BRUN45)
(the last 2 changes needed to fix bugs discovered by Michael Devore)
- added Int 2Fh/2Fh processing to set DOS version as per MS-DOS 4.0
- set FAT32 fields of FAT12/16 DPBs on Int21h/7302h. Fixes bug 1819
* autoexec.bat now single-line for FreeCOM compatibility when EOL=LF
* break.c: check_handle_break() return was undefined if no Ctrl-break
* config.sys: all commands removed as they were close to defaults

12
kernel/inthndlr.c
View File

@ -196,6 +196,18 @@ int int21_fat32(lregs *r)
xddp = MK_FP(r->ES, r->DI);
fmemcpy(&xddp->xdd_dpb, dpb, sizeof(struct dpb));
if (!ISFAT32(dpb))
{ /* FAT12/16 - set FAT32 fields. This helps DOSLFN 0.33+ */
xddp->xdd_dpb.dpb_nfreeclst_un.dpb_nfreeclst_st.dpb_nfreeclst_hi = 0;
xddp->xdd_dpb.dpb_xflags = 0;
xddp->xdd_dpb.dpb_xfsinfosec = 0xFFFF; /* unknown */
xddp->xdd_dpb.dpb_xbackupsec = 0xFFFF;
xddp->xdd_dpb.dpb_xdata = dpb->dpb_data;
xddp->xdd_dpb.dpb_xsize = dpb->dpb_size;
xddp->xdd_dpb.dpb_xfatsize = dpb->dpb_fatsize;
xddp->xdd_dpb.dpb_xrootclst = 0; /* impossible cluster number */
xddp->xdd_dpb.dpb_xcluster = dpb->dpb_cluster;
}
xddp->xdd_dpbsize = sizeof(struct dpb);
break;
}