INT 14 - HP Vectra EX-BIOS - "F14_PUT_BUFFER" - TRANSMIT BUFFER
	AX = 6F02h
	CX = number of characters in buffer
	DX = port number (0-3)
	ES:DI -> buffer containing characters
Return: AH = line status (see #00304)
	AL = modem status (see #00305)
	CX = number of bytes actually sent
	ES:DI -> next byte to be transferred (unchanged if all bytes sent)
Desc:	send characters from the specified buffer until all characters have
	  been sent or an error/timeout is encountered
Note:	supported by original HP Vectra ATIBM PC AT and by ES/QS/RS series Vectras
SeeAlso: AX=6F00h,AX=6F03h,AX=6F04h,INT 17/AX=6F02h