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Call VCOMM.VXD entry point with

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Data:

AX

=

function number

0000h

open COM/LPT port

Data:

BX

=

port number

00h-7Fh	=	COMx
80h-FFh	=	LPTx

Return:

DX:AX

=

handle???

0001h

set comm state

Data:	???
Return:	AX	=	???

0002h

setup comm port

Data:	???
Return:	AX	=	status (0000h failed, FFFFh success)

0003h

transmit character

Data:	EBX		=	handle???
	CL		=	character to transmit
Return:	AX	=		status ???

0004h

close comm port

Data:	EBX		=	handle???
Return:	AX	=		???

0005h

clear comm error

Data:	EBX		=	handle???
	EAX		=	???
Return:	AX	=		status???

0006h

"EscapeCommFunction"

Data:	EBX		=	handle???
	CX		=	???
	EAX		=	???
Return:	DX:AX	=		???

0007h

purge buffers

Data:	EBX		=	handle???
	CX		=	???
Return:	AX	=		status ???

0008h

set comm event mask

Data:	EBX		=	handle???
	CX		=	new event mask
Return:	AX	=		status ???

0009h

get comm event mask

Data:	EBX		=	handle???
Return:	AX	=		current event mask

000Ah

???

Data:	EBX		=	handle???
Return:	AX	=		???

000Bh

"WriteComm"

Data:	EBX		=	handle???
	CX		=	number of characters to write
	ES???:BX			buffer (if CX > 1)
	SI???		=	low byte contains character if CX=1
Return:	AX	=		status
	EAX	-		high word may be destroyed

000Ch

"ReadComm"

Data:	EBX		=	handle???
	CX		=	number of bytes to read
	ES???:DI			buffer
Return:	AX	=		status ???
	ZF	-		???

000Dh

set ??? callback

Data:	EBX		=	handle???
	CX		=	???
	DX			???
Return:	AX	=		status???

else

Return:

AX

=

0000h

See Also: