changes.txt

开放源码的编译器open watcom 1.6.0版的源代码

	the Null-Pointer Protection now supports read protection as well as
	write

7)	the original environment selector allocated by external DPMI is now
	saved at startup and restored on exit

8)	\dos32a.asm :
	INT 21h / AH=whatever - Disk Reset - has been removed

9)	\loader.asm :
	fixed problem with LX-style exec format and WATCOM linker v11.0,
	the Loader now ignores "Internal fixups applied" bit in LX header

10)	\CLIENT\int21h.asm :
	function 4Bh has been rewritten, the DOS Buffer requirement is now
	1KB instead of 4KB

11)	\CLIENT\data.asm :
	the fatal error (3005) now reported as "error in app exec" (error
	at link-time bit set)

12)	\CLIENT\int21h.asm :
	the protected mode interrupts are now restored upon client's exit
	in function 4Ch

13)	\CLIENT\int21h.asm :
	function 4Bh restores original PM ints before spawning and reinstalls
	client's ints after

14)	\CLIENT\misc.asm :
	"verbose_showstartup" now lists PSP_Sel, Env_Sel and Env_Seg

15)	\KERNEL\int31h.asm :
	DPMI functions 0800h/0801h are now supported in the shareware version

16)	\CLIENT\int21h.asm :
	new functions for allocation of DOS memory: 0FF94h...0FF97h

17)	\loader.asm :
	no extended memory is now required to run a protected mode program,
	the fixups are first loaded in DOS memory, only if not enough, they're
	loaded high

18)	\CLIENT\misc.asm :
	support for Null-Pointer Protection on reads has been removed, it
	conflicted with startup/exit code

19)	\KERNEL\misc.asm :
	fixed problem with spawning under Clean/XMS/VCPI systems when the
	DOS Extender crashed after spawning to an application two or more
	times, the actual bug was in the exit Kernel code

20)	\CLIENT\int21h.asm :
	fixed bug in function 40h - write to file - when truncation of files
	(using ECX = 0) didn't work properly

21)	\KERNEL\init.asm :
	\KERNEL\exit.asm :
	\KERNEL\misc.asm :
	the spawning techniques have been redesigned and improved

21a)	\KERNEL\int31h.asm :
	the memory management functions 05xxh have been redesigned and now
	offer improved performance and 99% safe protection against extended
	memory blocks overwritng

21b)	\KERNEL\int31h.asm :
	05xxh functions now keep track on from which process the memory is
	allocated (when spawned & sharing memory), upon process' termination
	all memory blocks associated with the process are freed automatically

22)	\CLIENT\debug.asm :
	with VERBOSE mode ON the critical handler will now list the Module name
	and Process_ID

23)	\dos32a.asm :
	the call to "restore_pit" after protected mode initialization has
	been removed

24)	\dos32a.asm :
	the default size of DOS transfer buffer is now 16KB instead of 64KB

25)	\KERNEL\int31h.asm :
	corrected DPMI function 050Ah - Get base and size of memory block,
	the base reported now points to the actual address of memory block,
	not to the header

26)	\KERNEL\int31h.asm :
	minor changes in 05xxh functions, the alignment of memory blocks is
	now PARA (16 bytes)

27)	\CLIENT\int21h.asm :
	new function 0FF8Fh to resize DOS transfer buffer, won't be documented
	though

28)	\CLIENT\int21h.asm :
	support for Win95/DOS 7.xx long filenames is included, DOS functions
	71xxh are now extended

29)	\CLIENT\int21h.asm :
	selectors allocated for loaded Objects and the "_sel_zero" selector
	are now deallocated upon DOS Extender's exit in function AH=4Ch

30)	the "restore_pit" is now called on initialization only for
	Process_ID = 0 processes

31)	\KERNEL\init.asm :
	the "pm32_maxextmem" is now set to zero when process is spawned from
	another DOS/32A process (ID32 check == true); less flexibility, but 
	much more safe

32)	\KERNEL\intr.asm :
	INT 0Fh (IRQ 7) was not redirected from "int_matrix" to either
	"irq_normal" or "irq_tester" (it was preserved, and hell I can't
	remember why...)

33)	loader.asm :
	\CLIENT\data.asm :
	a new warning (9005): "Object #%d contains no data or code" has been
	added

34)	\KERNEL\int31h.asm :
	added two new ADPMI API functions: 07h and 08h to get/set critical
	handler routine address, *MUST* be 16:16 sel:offs

35)	\dos32a.asm :
	\CLIENT\misc.asm :
	added support for "Focusing on specified VM" under Windows, when it
	is turned on, Win will run the DOS box VM in full screen

36)	\CLIENT\int21h.asm :
	mouse ISR handler is now automatically uninstalled on DOS Extender's
	exit, INT 33h / AX=000Ch is called with 0:0 in function AH=4Ch

37)	\CLIENT\data.asm :
	\CLIENT\strings.asm :
	followed prof. Seppo Mustonen advice, well, in a way ;-)

38)	\loader.asm :
	\CLIENT\data.asm :
	\CLIENT\int21h.asm :
	added new extended DOS function 0FF8Eh, Get Pointer to Client Vars
	and Pointer to Loaded Application Sel/Base Tables, will not be
	included in DOS/32A documentation

39)	\KERNEL\int31h.asm :
	function 0EEFFh now returns EAX with "D32A" ID-string instead of
	"PMDW", this function has been pretty much standardized and should
	be used for effective detection of currently running Extender:
	PMODE/W:    "PMDW"
	WDOSX:      "WDSX"
	DOS/32A:    "D32A"

40)	\CLIENT\misc.asm :
	fixed a little problem when DOS/32A was not able to start pure LE/LX
	applications, ie Linear Exec files not bound to any stub

Very special thanks to:

 - Kimmo Vehkalahti of Survo Systems Oy for all the complains :-) and for
   working so hard along with me to get this version released

and to

 - David Lopez for exclusive beta testing and lots of suggestions





Updates made to DOS/32 Advanced DOS Extender since version 4.00
===============================================================

1)	\KERNEL\int31h.asm :
	fixed bug in function 0500h when storing memory info in DS: selector
	instead of ES:

2)	\CLIENT\strings.asm :
	fixed bug in "prints" (dec) function when it could not write out
	numbers larger than 0x8000 because of CWD instruction which has
	been replaced with XOR DX,DX





Updates made to DOS/32 Advanced DOS Extender since version 3.00
===============================================================


1)	\KERNEL\detect.asm :
	adjusted CPU_detect routine, check for 8086 is removed

2)	\CLIENT\int21h.asm :
	DOS function 0Ah (input string) is removed

3)	\CLIENT\data.asm :
	adjusted some strings

4)	\CLIENT\data.asm :
	changed error code (4004): not enough ext mem to load app fixups

5)	\loader.asm :
	removed support for Slow Object Loading Scheme

6)	\CLIENT\int21h.asm :
	added code to restore original protected mode INT 21h in
	DOS function 4Ch

7)	\KERNEL\int31h.asm :
	updated DPMI API function 02h - ECX, EDX ain't used no more

8)	\dos32a.asm :
	used DOS function 0Dh to flush disk buffers

9)	\CLIENT\misc.asm :
	updated subroutine "check_inttab"

10)	\CLIENT\misc.asm :
	updated subroutine "set_descriptor"

11)	\CLIENT\misc.asm :
	updated subroutine "tone"

12)	\CLIENT\misc.asm :
	updated subroutines "search_for_mz" and "search_for_le"

13)	\loader.asm :
	rewritten loader LE and LX routines, page shift is now supported
	for LX-style applications

14)	\KERNEL\init.asm :
	fixed bug that caused no report of errors when protected mode
	was not entered successfully, added "jc addr" instruction to
	"init_done" subroutine

15)	\CLIENT\int10h.asm :
	fixed bug in VESA function 4F01h causing CX register not being
	passed down to real mode
	VESA functions 4F00h and 4F01h are now incorporated into a single
	function

16)	\CLIENT\int10h.asm :
	added new VESA function 4F09h

17)	\CLIENT\int10h.asm :
	added new VESA function 4F0Ah

18)	\CLIENT\int10h.asm :
	most of VESA functions have been rewritten

19)	\CLIENT\config.asm :
	bug fixed - options /QUIET and /PRINT:OFF now disable the copyright
	message as well as warnings

20)	\KERNEL\exit.asm :
	bug fixed - on exit from RAW system with "dos32a_exists" on, the
	real mode handler now is not deinstalled and "disableA20" is not
	called

21)	\CLIENT\int21h.asm :
	corrected function 1Ch

22)	\CLIENT\int21h.asm :
	fixed bug in function 34h

23)	\KERNEL\int31h.asm :
	fixed a little bug in functions 030xh when the parameters pushed on
	protected mode stack were not being copied properly to real mode
	stack

24)	\KERNEL\int31h.asm :
	DPMI Extended API functions 04h and 05h now return default top of
	stack in EDI register

25)	\KERNEL\intr.asm :
	adjusted functions that pass protected mode INT/EXC to vectors
	installed by application/user

26)	\CLIENT\int21h.asm :
	function 4Ch does not restore the environment segment in the PSP
	at offset 002Ch, in order to be compatible with external DPMIs

27)	\CLIENT\int10h.asm :
	VBE function 4F00h has been rewritten to be compatible with graphics
	cards that return mode list in the information structure

28)	\CLIENT\int21h.asm :
	removed code in function 4Ch that restored original INT 21h vector
	in protected mode

29)	\CLIENT\int21h.asm :
	added new extended API functions to allocate DPMI memory via INT 21h




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