IFND	EXEC_IO_I
EXEC_IO_I	EQU	1
**
**	$Filename: exec/io.i $
**	$Release: 2.04 Includes, V37.4 $
**	$Revision: 36.4 $
**	$Date: 90/05/10 $
**
**	Message structures used for device communication
**
**	(C) Copyright 1985-1991 Commodore-Amiga, Inc.
**	    All Rights Reserved
**

	IFND	EXEC_PORTS_I
	INCLUDE	"exec/ports.i"
	ENDC	; EXEC_PORTS_I

	IFND	EXEC_LIBRARIES_I
	INCLUDE	"exec/libraries.i"
	ENDC	; EXEC_LIBRARIES_I


;----------------------------------------------------------------
;
;   IO Request Structures
;
;----------------------------------------------------------------

;------ Required portion of IO request:

	STRUCTURE	IO,MN_SIZE
	APTR	IO_DEVICE			; device node pointer
	APTR	IO_UNIT			; unit (driver private)
	UWORD	IO_COMMAND			; device command
	UBYTE	IO_FLAGS			; special flags
	BYTE	IO_ERROR			; error or warning code
	LABEL	IO_SIZE


;------ Standard IO request extension:

	ULONG	IO_ACTUAL			; actual # of bytes transfered
	ULONG	IO_LENGTH			; requested # of bytes transfered
	APTR	IO_DATA			; pointer to data area
	ULONG	IO_OFFSET			; offset for seeking devices
	LABEL	IOSTD_SIZE


;------ IO_FLAGS bit definitions:

	BITDEF	IO,QUICK,0			; complete IO quickly


;----------------------------------------------------------------
;
;   Standard Device Library Functions
;
;----------------------------------------------------------------

	LIBINIT

	LIBDEF	DEV_BEGINIO	; process IO request
	LIBDEF	DEV_ABORTIO	; abort IO request


;----------------------------------------------------------------
;
;   IO Function Macros
;
;----------------------------------------------------------------


	ifnd	__m68

BEGINIO	MACRO
	LINKLIB	DEV_BEGINIO,IO_DEVICE(A1)
	ENDM

ABORTIO	MACRO
	LINKLIB	DEV_ABORTIO,IO_DEVICE(A1)
	ENDM

	else	;is Macro68

BEGINIO	MACRO	0,0
	LINKLIB	DEV_BEGINIO,(IO_DEVICE,a1)
	ENDM

ABORTIO	MACRO	0,0
	LINKLIB	DEV_ABORTIO,(IO_DEVICE,a1)
	ENDM

	endc	;__m68



;----------------------------------------------------------------
;
;   Standard Device Command Definitions
;
;----------------------------------------------------------------

;------ Command definition macro:
DEVINIT	MACRO	; [baseOffset]
	IFC	'\1',''
CMD_COUNT	SET	CMD_NONSTD
	ENDC
	IFNC	'\1',''
CMD_COUNT	SET	\1
	ENDC
	ENDM

DEVCMD	MACRO	; cmdname
\1	EQU	CMD_COUNT
CMD_COUNT	SET	CMD_COUNT+1
	ENDM


;------ Standard device commands:

	DEVINIT	0

	DEVCMD	CMD_INVALID	; invalid command
	DEVCMD	CMD_RESET		; reset as if just inited
	DEVCMD	CMD_READ		; standard read
	DEVCMD	CMD_WRITE		; standard write
	DEVCMD	CMD_UPDATE		; write out all buffers
	DEVCMD	CMD_CLEAR		; clear all buffers
	DEVCMD	CMD_STOP		; hold current and queued
	DEVCMD	CMD_START		; restart after stop
	DEVCMD	CMD_FLUSH		; abort entire queue


;------ First non-standard device command value:

	DEVCMD	CMD_NONSTD

	ENDC	; EXEC_IO_I