MODULE	'exec/ports'

OBJECT IO
	MN:MN,
	Device:PTR TO DD,
	Unit:PTR TO Unit,
	Command:UWORD,
	Flags:CHAR,
	Error:UBYTE

OBJECT IOStd OF IO
	Actual:LONG,
	Length:LONG,
	Data:LONG,
	Offset:LONG

CONST	IOB_QUICK=0,
		IOF_QUICK=1,
		CMD_INVALID=0,
		CMD_RESET=1,
		CMD_READ=2,
		CMD_WRITE=3,
		CMD_UPDATE=4,
		CMD_CLEAR=5,
		CMD_STOP=6,
		CMD_START=7,
		CMD_FLUSH=8,
		CMD_NONSTD=9,
		DEV_BEGINIO=-30,
		DEV_ABORTIO=-36