INT 17 - PCIBM PC Magazine PCSpool - BUILD PAUSE CONTROL RECORD
	AH = C1h
	DX = printer port (0-3)
	DS:SI -> 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. string to save for display
Note:	flushes pending writes
SeeAlso: AH=C0h,AH=C2h