IFND EXEC_IO_I
EXEC_IO_I SET 1
**********************************************************************
*
*   Commodore Amiga -- ROM Operating System Executive Include File
*
**********************************************************************
*
*   Source Control:
*
*   $Header: io.i,v 1.0 85/08/28 15:10:43 carl Exp $
*
*   $Locker:  $
*
**********************************************************************

    IFND EXEC_PORTS_I
    INCLUDE "exec/ports.i"
    ENDC

    IFND EXEC_LIBRARIES_I
    INCLUDE "exec/libraries.i"
    ENDC


*----------------------------------------------------------------
*
*   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
*   ULONG   IO_RESERVED1
*   ULONG   IO_RESERVED2
    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
*
*----------------------------------------------------------------

BEGINIO       MACRO
       LINKLIB DEV_BEGINIO,IO_DEVICE(A1)
       ENDM

ABORTIO       MACRO
       LINKLIB DEV_ABORTIO,IO_DEVICE(A1)
       ENDM


*----------------------------------------------------------------
*
*   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