history.txt

GNU FreeDOS兼容MS DOS很好的东东.

      bug #1657)
    * added BOOTONLY option to SYS (modified by Bart)
+ Changes David Bolen
    * add support for UNC-style paths (that start with "\\")
+ Changes Luchezar Georgiev
    * add Bulgarian country structure data
+ Changes Bart
    * flip some slashes in drivers/*.asm
      (enables cross-assembly on Linux)
    * remove superfluous printf("\n") in patchobj.c
    * combine the INIT class with the CODE class (classes can span
      multiple physical segments)
    * re-add _TEXT to LGROUP to be able to simplify the patchobj magic
    * don't specify -zPI_GROUP for the init code in Borland compilers
      (unnecessary, it will be put there because of segs.inc)
    * remove STDPATCH; it is no longer necessary
    * add FILESHIGH, LASTDRIVEHIGH, and STACKSHIGH and DOSDATA=UMB
      to load these structures into UMBs
    * make DOS sub-MCBs visible (seen by MEM)
    * preliminary allocation of FILES etc. now takes place at the
      top of conventional memory, and device drivers are loaded before
      the final allocation takes place.
    * handle multiple UMBs more correctly (but config.sys can use
      only one UMB for devicehigh -- /Ln,xxxx is not yet implemented)
    * minor size optimizations in newstuff.c, chario.c, dosfns.c and fcbfns.c.
      asmsupt.asm: correct fmemchr (all n's) and *memset/*memcpy
      (n==0)
    * introduce lol structure for list of lists; avoid lots of
      relocations
    * avoid more relocations in the asm files by loading ds from
      [cs:_DGROUP_]
    * Fix problem with attributes with the volume label bit + findnext
    * SYS: avoid copying kernel.sys and command.com if the destination
      is identical to the source (fixes bug #1656).
    * Fix bug in DeleteBlockInBufferCache: needs to make the block
      invalid, not flush it, if we're writing (bug #1635).
    * added switches=/k/n/f support to the config.sys parser.

2003 Mar 14 - Build 2029
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * fattab.c, fat.h removed the wrong ELSE_ISFAT32()
    * fatfs.c: rmdir would crash if you rmdir'ed an existing file
    * config.c, main.c, portab.h
      implement INSTALL and INSTALLHIGH for config.sys
      basic COUNTRY=xxx support (with a little help from others,
      mentioned in config.c)
    * execrh.asm: save si, di for strategy device driver handler
    * (adjusted by Bart): the internal "truename" has to reject
      wildcards for all commands except for the exposed "truename"
      (DosTrueName, int21/ah=60), FindFirst and FCB functions.
+ Changes Bart
    * add top level makefile with list of files to zip for releases
    * remove obsolete documentation and intr.h
    * eliminated the "f_highwater" fnode field.
    * reintroduced HMA_TEXT segment and adjust segments in libm.lib
      to solve problems with Borland compilers.

2002 Dec 9 - Build 2028
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * move clock driver initialization to inittext
    * new ELSE_ISFAT16 macro to save some bytes
    * use _TEXT for old HMA_TEXT, _LOWTEXT for old _TEXT to get
      a slightly less complicated memory model from the C compiler's
      point of view.
    * add support for int2f/4a01,4a02: query/allocate HMA space.
    * updated config.txt
+ Changes Arkady V. Belousov
    * slightly improved asm for print_hex and int2f clear_ax stuff
    * use #error for unknown compilers
    * remove hexDigits reference
    * correct comment in kernel.asm (pad to 05fdh)
+ Changes Bart
    * fix ss:sp init bug for int21/ax=4b01 (visible in DEBUG)
    * fix redirection problem for character output routines
    * fix press the any key message for floppy swaps
    * correct cluster value for BAD cluster
    * correct FAT12/16/32 cutoff magic values as per the MS spec
    * the BUFFERS structure is now the same as in MSDOS 5+ and uses
      a circular double-linked list using near pointers.
    * move all old RCS log messages into one seperate file
    * divide the fnode f_cluster_offset field by the size of a cluster:
      this gives a more efficient map_cluster().
    * point the CharMapSrvc pointer to the DOS DS for AARD compliance.
    * nls.c: set CX to cooperate with load_unf.exe

2002 Nov 9 - Build 2027
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * memset ErrorAlreadyPrinted to 0 in config.c
+ Changes Bart
    * reset drive before and after int26 in SYS for winnt compatibility
    * propagate sharing bits correctly in DosOpen
    * return DE_NFILES if a volume label is not found; search for volume
      label if attr & 8 not just if attr==8
    * initialize the critical error code to 0 in inthndlr.c
    * ignore value of DH for extended open int21/ah=6c
    * fix problem with NULL device code being in the wrong segment
    * Hopefully innocent hack to deal with NDN in ioctl.c (ignore upper bits
      of the drive number)
    * use subst bit 15 for int21/ax=4409(IOCTL-CHECK IF BLOCK DEVICE REMOTE).

2002 Oct 27 - Build 2027rc
-------- Bart Oldeman ([e-mail])
+ Changes Bart
    * reorganized chario.c, got F1-F6, Ins, Del, etc. working
    * fixed bug in extended open
    * fixed bug in memory manager (realloc should try to defragment;
      UMB fixes)
    * consistently pass sft_idx around for all SFT functions (instead of
      the far pointer)
    * lpUserStack is gone :)
    * Idle interrupt: now uses disk i/o stack instead of error stack if it
      re-enters DOS; can not be called from int21/ah=3f. It also checks
      InDos now (as documented in "undocumented dos").
    * int21/ah=59 should use the disk i/o stack, not the character stack.
    * get_cds: a uniform way to get the CDS for drive X which can do error
      checking too. get_dpb: similar.
    * task.c uses mid-level system file handles instead of PSP handles.
    * SFT sequence is MS/DR DOS like: 0=AUX 1=CON 2=PRN
    * int21/ah=4d needs to clear the return code after returning it.
    * Removed need for "unusedretval" because some functions return a long int
      now.
    * Do not warn for some additional LBA partition layouts (begin/end
      cylinder=1023) in initdisk.c.
    * support int2f/ax=1213 (uppercase character) (ASCII only for now).
    * fix for top of memory parameter to device driver - fixes problem
      with DRDOS emm386
    * eliminated printf for non-init code -- use put_unsigned and
      put_string instead
    * better MK_FP for Turbo C++ 1.01 and later
    * PSP related task.c cleanups
    * use --best and new upx (1.23) for binary build
    Changes Tom and Bart:
    * Use Pascal calling convention for memcpy and friends in asmsupt.asm
    * Fixed make temp file
    * fix bug in DosFindNext
    * misc makefile fixes

2002 Aug 3 - Build 2027test
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * enable LBA FAT16 booting
    * workaround for redirectors that do/do not set the opencount
    * int25/26 should fail for redirectors
    * set the number of sectors per track in the INT 1E table when
      reading/writing floppies
    * disabled fatal() in error.c
    * Disable the A20 line upon exec (int21/ah=4B). This is necessary for some
      brain-dead exepacked programs.
    * removed unnecessary "BUFFERS" fields
    * proper check for network/non-existing drive for int25/26.
    * save more bytes on the stack at various places
    * made the local registers for inthndlr.c "near" instead of "far".
    * fix bug in strchr handling for fcbfns.c (FcbParseFname)
+ Changes Steffen (but changed a lot by Bart)
    * new truename (Bart: but without mapPath() style struct)
    * merge open/create functions into one extended open function
    * also honor the sharing bits better for "open"
    * use local 8+3 path names in fatfs.c; merge name+extension
      into one array
    * take care of filenames that start with ASCII 5: they should be
      treated as starting with 0xe5
    * exploit the fact that the filenames are already "truenames",
      i.e., fully qualified in fatfs.c. This simplifies parsing a lot.
+ Changes Bart
    * make "if exist c:\dir\nul" working
    * honor "do not inherit handle on exec" flag for "open".
    * improve the FCB functions so that they set the critical error code
      properly
    * next_cluster returns "1" instead of DE_xxx in case of failure.
    * create one function to do binary character IO (used for CLOCK$
      driver and character drivers such as CON)
    * better handling of ABORT/FAIL
    * merge all read and write functions
    * patchobj makefile correction
    * printf uses va_list etc.
    * quicker and more robust Watcom build
    * use FS: and GS: for Watcom 386.
    * workaround: don't use DL for floppy boots, but fixed A:
    * disable unused functions in floppy.asm
    * cleaner prototypes (thanks to gcc)
    * reorganized ioctl.c; there was an uninitialized variable.
    * inlined some functions of fattab.c
    * added (f)strcmp, (f)memcmp and (f)memchr to asmsupt.asm
    * initially suggested by Arkady: dsk.c FS_info copy optimization
    * initialize a VDISK signature in the HMA
    * sysclk.c: small size optimization
    * small UMB fixes
    * made the CDS into a proper array instead of a structure with
      one member
    * large task.c cleanups -
      merge as much as possible from DosExeLoader and DosComLoader
      (from Tom:) eliminate some structures in low memory
    * main.c: slightly cleanup "SHELL=" line parsing.

2002 May 9 - Build 2026b
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * limit output at boot time somewhat
    * GetCurrentDirectory should fail, if drive is accessible
    * fixed some minor config.sys parser bugs and have the possibility
      of things like 123?device=EMM386.EXE NOEMS
    * shorter version of DosMemLargest()
+ Changes Bart
    * repaired makefile dependencies
    * implemented multi-sector writes, and re-merged
      readblock()/writeblock() into rwblock ()
    * implemented int21/ah=1c for network drives (RHIDE needs this)
    * initialize current_ldt for findnext (hinted by Steffen)
    * check serial number for floppy disk changes where the drive
      does not feature a changeline
    * reset to root directory when floppy has changed
    * cleaned up endian helpers {get,put}{byte,word,long}
    * don't close file if disk is full
    * enforce minimum of 9 sectors per track for INT1E (necessary for
      some floppies on some XTs)
    * clear carry when calling INT23 (ctrl-break handler) as per RBIL
    * don't copy FCBs on exec if they are pointed to by FFFF:FFFF.
    * resolved warnings for  Watcom (now compiles with -wx -we)
    * truename fix (return DE_FILENOTFND for foo.bar.foo)
+ Changes Jeremy
    * fixed SYS _dos_getdrive for non-Borland compilers
+ Changes Tom and Bart
    * cleaned up fatfs.c, fattab.c, sysclk.c (CLOCK$ driver), systime.c

2002 Feb 17 - Build 2026a
-------- Bart Oldeman ([e-mail])
+ Changes Martin
    * fixed SYS for non-Watcom compilers
+ Changes Tom
    * set CONFIG environment variable to selected number of CONFIG.SYS
      menu entry, for example for use in AUTOEXEC.BAT.
+ Changes Bart
    * fixed FCBOpen
    * network redirector fixes ; it appears that clearing CF before calling
       the redirector is safer than setting CF
    * allow creating, renaming and deleting volume labels using FCBs
    * fix renaming with wildcards using FCBs
    * some dosfns.c and fcbfns.c clean-ups
    * booting from hard disk now always sets the default drive to C:,
      not D: if booting from the second physical hard disk, etc (bug #1062).

2002 Feb 9 - Build 2026
-------- Bart Oldeman ([e-mail])
+ Changes Tom
    * fixed various typos, #includes
+ Changes Bart
    * fixed ECHO in config.sys
    * made passing parameters to command.com more robust:
      zero commandline before use, fixed buffer overflow for F5+F8
    * "uppermem_root" in the List of Lists is now FFFF if no UMBs
      available, as documented in RBIL
    * removed all direct hooks from init_text to hma_text; duplicated
      the remaining functions (memset, memcpy and friends).
    * bumped up default DOS version of FAT32 enabled kernel to 7.10