Int 2F/AX=1684h/BX=044Ah

MS Windows - mmdevldr - GET API ENTRY POINT

AX = 1684h
BX = 044Ah (virtual device ID for "mmdevldr" device) (see #02642)
ES:DI = 0000h:0000h

Return:
ES:DI -> VxD API entry point (see #02685)
0000h:0000h if the VxD does not support API in current mode

See Also: AX=1684h"DEVICE API" - INT 20"Windows"



(Table 02685)
Call MMDEVLDR.VXD entry point with:.
DX = function number
0000h ???
Return:
CF clear if successful
AX = 0000h
CF set on error
AX = error code (000Bh)

Note: Invokes VxDCall 17000Eh ("CallAtAppyTime") 0001h ???

Return:
CF clear if successful
AX = 0000h
CF set on error
AX = error code (000Bh)

Note: Invokes VxDCall 17000Eh ("CallAtAppyTime") 0002h ??? EDX = ???

Return:
CF clear if successful
AX = 0000h
EDX = ???
CF set on error
AX = error code
0003h ???
Return:
CF clear if successful
AX = 0000h
CF set on error
AX = error code

Note: Invokes VxDcall 2A0002h ("VWIN32_QueueUserApc") 0004h set Win32 event

Return:
CF clear if successful
AX = 0000h
CF set on error
AX = error code

Note: Invokes VxDcall 2A000Eh ("VWIN32_SetWin32Event") 0005h ??? (allocates some memory)

Return:
CF clear
AX = 0000h
0006h ??? (frees memory)
Return:
CF clear if successful
AX = 0000h
CF set on error
AX = error code
else
Return:
CF set
AX = 000Bh (invalid function)

See Also: #02684 - #02686

Category: Windows - Int 2Fh - M

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