INT 15 - VMiX - "sys_chanreq" - I/O CHANNEL OBJECT MANAGER
	AH = 01h
	STACK:	WORD	object ID of requestor
		DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. name of requested method
			"assign" assign channel to object
			"deassign" deassign channel
			"cursor" set cursor on/off
			"init" initialize comm port
			"open" open I/O channel
			"position" set cursor position
			"receive" get buffered packet from comm port
			"send" send buffered packet to comm port
			"vio" set current virtual I/O to specified channel
			"window" make window at cursor position
		---if "assign"---
		 WORD	object UID
		 WORD	caller UID/PID
		 DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	CSL with port
		---if "deassign"---
		 WORD	channel ID
		---if "cursor"---
		 WORD	channel ID (must be a SRCSINK)
		 WORD	new state (0000h off, 0001h on)
		---if "init"---
		 WORD	channel ID (must be a SRCSINK)
		 WORD	comm port number (00h-03h)
		 WORD	UART(Universal Asyncronous Receiver/Transmitter)  A peripheral device which converts a sequence of bytes into a serial bit stream at a programmable rate, and vice versa.  This device is what makes an RS-232 serial port function.  See also USART. init code
		---if "open"---
		 WORD	channel ID
		---if "position"---
		 WORD	channel ID (must be a SRCSINK)
		 WORD	position (high byte = row, low byte = column)
		---if "receive"---
		 DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to buffer
		---if "send"---
		 WORD	length of buffer
		 DWORDDoubleword; four bytes.	 Commonly used to hold a 32-bit segment:offset or selector:offset address.	pointer to buffer
		---if "vio"---
		 WORD	channel ID (must be a SRCSINK)
		---if "window"---
		 WORD	top left (high byte = row, low byte = column)
		 WORD	bottom right (high byte = row, low byte = column)
Return: DX:AX -> IRP structure or 0000h:0000h
SeeAlso: AH=00h"VMiX",AH=02h"VMiX"