www.delorie.com/djgpp/doc/rbinter/26.html   search  
Table 2670

)
Call VCOMM.VXD entry point with:
	AX = function number
	    0000h open COM/LPT port
		BX = port number (00h-7Fh = COMx, 80h-FFh = LPTx)
		Return: DX:AX = handle???
	    0001h set comm state
		???
		Return: AX = ???
	    0002h setup comm port
		???
		Return: AX = status (0000h failed, FFFFh success)
	    0003h transmit character
		EBX = handle???
		CL = character to transmit
		Return: AX = status???
	    0004h close comm port
		EBX = handle???
		Return: ???
	    0005h clear comm error
		EBX = handle???
		EAX = ???
		Return: AX = status???
	    0006h "EscapeCommFunction"
		EBX = handle???
		CX = ???
		EAX = ???
		Return: DX:AX = ???
	    0007h purge buffers
		EBX = handle???
		CX = ???
		Return: AX = status???
	    0008h set comm event mask
		EBX = handle???
		CX = new event mask
		Return: AX = status???
	    0009h get comm event mask
		EBX = handle???
		Return: AX = current event mask
	    000Ah ???
		EBX = handle???
		Return: ???
	    000Bh "WriteComm"
		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"
		EBX = handle???
		CX = number of bytes to read
		ES???:DI -> buffer
		Return: AX = status ???
			ZF = ???
	    000Dh set ??? callback
		EBX = handle???
		CX = ???
		DX = ???
		Return: AX = status???
	    else
		Return: AX = 0000h
SeeAlso: #02669,#02671

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2000   by Ralf Brown     Updated Jul 2000