VCOMM_PM_API_OPENCOM

include vcomm.inc

mov     ax, VCOMM_PM_API_OPENCOM    ;function number
mov     bx, PortNum                 ;port number
call    [_VCOMMCallAddr]            ;protected-mode API address

Calls _VCOMM_OpenComm to opens a communications resource.

• Returns a communications resource handle if successful, otherwise, returns IE_BADID or IE_OPEN.

PortNum

The number of the port to open.

See also _VCOMM_OpenComm