; -----------------------------------------------------------------------------
; iop command list structure
; many devices, such as qttys, use the following list of commands
		struct	0
		ds	2		; (not used)
cm_open:	ds	2		; open
cm_close:	ds	2		; close
cm_read:	ds	2		; read
cm_write:	ds	2		; write
cm_gmode:	ds	2		; get device parameters (mode)
cm_smode:	ds	2		; set device parameters
cml		equ	$
		mend	cmd
NCMDS		equ	cml/2		; number of commands

; command type.
; the upper bits of the command byte sent to the iop specify the type
; of command.  (the lower bits specify the iop channel number.
; NCHANS is the number of iop channels.  NCHANS is a power of 2.)
cIOPABORT	equ	0 * NCHANS
cIOPOPEN	equ	CM_OPEN/2 * NCHANS
cIOPCLOSE	equ	CM_CLOSE/2 * NCHANS
cIOPREAD	equ	CM_READ/2 * NCHANS
cIOPWRITE	equ	CM_WRITE/2 * NCHANS
cIOPGMODE	equ	CM_GMODE/2 * NCHANS
cIOPSMODE	equ	CM_SMODE/2 * NCHANS
cIOPWAKE	equ	7 * NCHANS