Int 2F/AX=FBA1h/BX=0082h

TKERNEL (Borland DOS extender) - GET ENTRY POINT

AX = FBA1h
BX = 0082h
ES:DI -> response buffer (see #03135)

Return:
ES:DI buffer filled

See Also: AX=FBA1h/BX=0081h - AX=FBA1h/BX=0084h

Format of TKERNEL response buffer: Offset Size Description (Table 03135) 00h 4 BYTEs signature "IABH" 04h DWORD pointer to FAR extender entry point (see #03136)

(Table 03136) Call TKERNEL entry point with:. AX = function number 0000h initialize???

STACK:
WORD ???

Return:
AX = status??? STACK unchanged 0001h get version???

Return:
AX = 0200h for v2.0.34 0002h get ???

Return:
AX = ??? (011Eh or 0182h seen) 0003h load protected-mode executable

STACK:
DWORD -> ASCIZ filename of executable DWORD ??? DWORD -> program arguments (counted string plus CR) DWORD -> environment for protected-mode executable (terminated with two consecutive NULs) DWORD -> WORD buffer for ???

Return:
AX = status??? STACK unchanged 0004h get descriptor

STACK:
WORD selector for which to get descriptor WORD segment number (when running in real mode) DWORD -> buffer for descriptor

Return:
CF clear if successful buffer filled CF set on error AX destroyed??? STACK unchanged 0005h ???

STACK:
WORD selector for ??? WORD subfunction number??? 0000h run previously-loaded program??? 0001h ??? (similar to 0000h) 0002h 0003h 0005h ??? (similar to 0000h and 0001h)

Return:
AX = status??? STACK unchanged 0006h ???

STACK:
WORD ??? DWORD -> WORD (call) max iterations of ??? (ret) remaining iterations

Return:
AX = ??? STACK unchanged 0007h unused

Return:
AX = 0001h 0008h unused

Return:
AX = 0001h 0009h copy protected-mode memory into conventional memory

STACK:
WORD selector for source segment WORD segment of source if in real mode??? DWORD offset of source WORD number of bytes to copy DWORD -> low-memory destination

Return:
AX = status STACK unchanged 000Ah copy conventional memory into protected-mode memory

STACK:
WORD selector for destination segment WORD segment of destination if in real mode??? DWORD offset of destination WORD number of bytes to copy DWORD -> low-memory source

Return:
AX = status STACK unchanged 000Bh get ??? pointers

STACK:
WORD desired pointer 0000h get ??? 0002h get protected-mode CR3 0003h get 4K page table buffer pointer

else Return:
DX:AX = FFFFh:FFFFh

Return:
DX:AX = requested pointer STACK unchanged 000Ch set ??? pointers

STACK:
WORD desired pointer 0000h set ??? 0002h set protected-mode CR3 0003h set 4K page table buffer pointer else ignore DWORD new value for pointer

Return:
STACK unchanged 000Dh get ??? pointers

STACK:
WORD desired pointer 0000h get ??? 0001h get ??? 0002h get ??? 0003h get ??? 0004h get ??? 0005h get ??? 0006h get ??? 0007h get ???

else Return:
DX:AX = FFFFh:FFFFh

Return:
DX:AX = desired pointer STACK unchanged 000Eh set ??? pointer

STACK:
WORD desired pointer 0000h set ??? 0001h set ??? 0002h set ??? 0003h set ??? 0004h set ??? 0005h set ??? 0006h set ??? 0007h set ???

else Return:
DX:AX = FFFFh:FFFFh

Return:
STACK unchanged 000Fh get ???

Return:
AX = ??? (seen 0008h) 0010h get ???

Return:
AX = ??? 0011h determine whether selector is valid

STACK:
WORD possible selector

Return:
AX = selector or 0000h if invalid STACK unchanged 0012h get physical address

STACK:
WORD selector for desired segment WORD segment number if in real mode DWORD offset within segment

Return:
DX:AX = 32-bit physical address or 00000000h on error BX destroyed STACK unchanged 0013h ???

Note: Normally jumps to code for function 0012h 0014h copy protected-mode memory to conventional memory, with ???

STACK:
WORD selector for source segment WORD segment of source if in real mode??? DWORD offset of source WORD number of bytes to copy DWORD -> low-memory destination

Return:
AX = status??? STACK unchanged 0015h copy conventional memory to protected-mode memory, with ???

STACK:
WORD selector for destination segment WORD segment of destination if in real mode??? DWORD offset of destination WORD number of bytes to copy DWORD -> low-memory source

Return:
AX = status??? STACK unchanged 0016h set ??? pointer

STACK:
WORD unused DWORD -> ??? or 0000h:0000h

Return:
AX = 0000h STACK unchanged 0017h allocate real-mode procedure???

STACK:
DWORD ASCIZ name of procedure DWORD ??? DWORD address of subroutine to invoke

Return:
AX = status 0032h procedure by that name exists 0033h no more real-mode procedures available DX destroyed STACK unchanged 0018h unused

Return:
AX = 0001h 0019h get parameter block

Return:
DX:AX -> parameter block (format unknown at this time, but 92h bytes) (preceded by signature "!!PARAM-BLOCK!!") 001Ah get ???

Return:
AX = ??? (0148h seen) 001Bh free real-mode procedure???

STACK:
DWORD -> ASCIZ name of procedure

Return:
??? STACK unchanged 001Ch check whether packets from protected mode task pending

Return:
AX = 0001h if packets pending, 0000h if not 001Dh set ???

STACK:
DWORD ??? or 0000h:0000h

Return:
AX,BX destroyed STACK unchanged 001Eh ???

STACK:
WORD ??? (high byte ignored) DWORD -> data structure (below)

Return:
AX,BX,CX,DX destroyed data structure updated STACK unchanged Format of data structure: Offset Size Description 00h 2 BYTEs unused 02h WORD ??? 04h WORD ??? 06h WORD ??? 08h 2 BYTEs unused 0Ah WORD ??? 0Ch WORD (call) ??? (ret) offset of this data structure (BUG?) 001Fh set ???

STACK:
WORD ??? (set to 0001h if zero)

Return:
AX destroyed STACK unchanged 0020h ???

STACK:
DWORD -> ??? (8 bytes of data)

Return:
AX = ??? STACK unchanged 0021h ???

STACK:
DWORD -> ??? (8 bytes of data) WORD ??? WORD ???

Return:
AX = ??? STACK unchanged 0022h ???

STACK:
DWORD -> ??? (8 bytes of data) DWORD -> 4-byte buffer for results

Return:
AX = ??? STACK unchanged 0023h ???

STACK:
DWORD -> ??? (8 bytes of data)

Return:
AX = ??? STACK unchanged 0024h set ???

STACK:
WORD ???

Return:
AX destroyed STACK unchanged 0025h get ???

Return:
AX = ??? (value set with func 0024h)

0026h BUG:
Jumps to hyperspace due to fencepost error FFFFh set DOS memory management functions BX:SI -> FAR routine for allocating DOS memory (called with AH=48h,BX=number of paragraphs to alloc; returns CF clear, AX=segment of allocated memory, or CF set on error) CX:DI -> FAR routine for freeing DOS memory (called with AH=49h,ES=segment of block to free; returns CF set on error, AX=error code)

Note: Each of these pointers normally points at INT 21/RETF

other Return:
AX = 0001h

Note: BX may be destroyed by any of the API calls

Category: DOS Extenders - Int 2Fh - T

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