Int 2F/AX=1684h/BX=000Eh

MS Windows - VCD - GET API ENTRY POINT

AX = 1684h
BX = 000Eh (virtual device ID for VCD device) (see #02642)
ES:DI = 0000h:0000h

Return:
ES:DI -> VxD API entry point (see #02652)
0000h:0000h if the VxD does not support API in current mode

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



(Table 02652)
Call VCD entry point with:.
EDX = function number
0000h get VCD version
Return:
CF clear
AH = major version
AL = minor version
0001h get ???
Return:
CF clear
AX = bit mask of ???
0002h get ???
CX = COM port number
Return:
CF clear
DX:AX -> ???
0003h set ???
CX = COM port number
DX:AX -> new ???
Return:
CF clear
0004h acquire COM port
AX = ???
CX = COM port number
Return:
CF clear
AX = ???
EBX = ???
DX = ???
0005h release COM port
CX = COM port number
Return:
CF clear
0006h ???
Return:
CF set
AL = 00h
else
Return:
CF set
EAX = FFFFFFFFh

Note: These functions are apparently only available from the system VM, returning CF set and EAX=FFFFFFFFh otherwise

See Also: #02651 - #02653

Category: Windows - Int 2Fh - M

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