Format of Banyan VINES 3270 status line:
Offset	Size	Description	)
 00h	BYTE	comm line status
		00h inactive
		01h active
 01h	BYTE	activation level
		01h physical unit activated
		02h logical unit also activated
		03h session is bound
 02h	BYTE	data traffic state
		00h inactive
		01h active
 03h	BYTE	screen ownership
		00h SLU->PLU session owns screen
		01h SLU->SSCP session owns screen
 04h	BYTE	keyboard status (see #03367)
 05h	BYTE	insert mode
		01h if in insert mode
 06h	BYTE	numeric
		01h if current screen buffer is numeric only
 07h	BYTE	printer status
		00h printer not assigned
		01h printer is inactive
		02h printer error
		03h currently printing
		04h printer is busy
		05h printer is very busy
 08h	BYTE	printer assignment
 09h	BYTE	maximum size of network name
 0Ah  N BYTEs	ASCIZ network name
	BYTE	maximum size of message window
      M BYTEs	null-terminated message window
	BYTE	code set
		00h EBCDIC
		01h ASCII
      M BYTEs	extended attributes
		01h extended attributes are in effect (stored at screen+1920)
		    each extended attribute specifies
		    bits 0,1: 00=normal, 01=blink, 10=reverse, 11=underscor
		    bits 2-4: 000=default,001=blue,010=red,011=pink,
			      100=green,101=turquoise,110=yellow,111=white
	BYTE	extended color
		01h other than base color is in effect