; Assembler header file for Joystick
; Written by DefMod (Dec  9 2012) on Sun Dec  9 15:43:44 2012
; Jonathan Coxhead, jonathan@doves.demon.co.uk, 18 May 1995

; OSLib---efficient, type-safe, transparent, extensible,
; register-safe API coverage of RISC OS
; 
; Copyright (c) 1994-2012 Jonathan Coxhead and OSLib maintainers
; 
; Licence:
; 
;    OSLib is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 1, or (at your option)
; any later version - and this with the following clarification and
; special exception:
; 
;    Linking this library statically or dynamically with other modules
; is making a combined work based on this library. Thus, the terms
; and conditions of the GNU General Public License cover the whole
; combination.
; 
;    As a special exception, the copyright holders of this library
; give you permission to link this library with independent modules
; to produce an executable, regardless of the license terms of these
; independent modules, and to copy and distribute the resulting
; executable under terms of your choice, provided that you also meet,
; for each linked independent module, the terms and conditions of the
; license of that module. An independent module is a module which is
; not derived from or based on this library. If you modify this
; library, you may extend this exception to your version of the library,
; but you are not obliged to do so. If you do not wish to do so, delete
; this exception statement from your version.
; 
;    OSLib is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; 
;    You should have received a copy of the GNU General Public License
; along with this programme; if not, write to the Free Software
; Foundation, Inc, 675 Mass Ave, Cambridge, MA 02139, USA.

        [       :LNOT: :DEF: Joystick_Hdr
        GBLS    Joystick_Hdr

        [       :LNOT: :DEF: Get_Types
        GBLS    Get_Types
        ]
        [       :LNOT: :DEF: Types_Hdr
Get_Types                       SETS    "GET oslib/Types.Hdr"
        |
Get_Types                       SETS    ""
        ]
        $Get_Types

        [       :LNOT: :DEF: Get_OS
        GBLS    Get_OS
        ]
        [       :LNOT: :DEF: OS_Hdr
Get_OS                          SETS    "GET oslib/OS.Hdr"
        |
Get_OS                          SETS    ""
        ]
        $Get_OS

;Symbols for constants
Joystick_X                      *       &FF
Joystick_Y                      *       &FF00
Joystick_Switches               *       &FF0000
Joystick_XShift                 *       0
Joystick_YShift                 *       8
Joystick_SwitchesShift          *       16
Joystick_HalfWordX              *       &FFFF
Joystick_HalfWordY              *       &FFFF0000
Joystick_HalfWordXShift         *       0
Joystick_HalfWordYShift         *       16

;Symbols for structure offsets and sizes
        ^       0
        #       Bits
Joystick_State                  *       @

        ^       0
        #       Bits
Joystick_HalfWordState          *       @


;Symbols for SWI's and SWI reason codes
XJoystick_Read                  *       &63F40
Joystick_Read                   *       &43F40
   ;Entry
   ;  R0 = joystick_no (Int)
   ;Exit
   ;  R0 = state (Joystick_State)

XJoystick_ReadHalfWord          *       &63F40
Joystick_ReadHalfWord           *       &43F40
   ;Entry
   ;  R0 = &100 :OR: joystick_no (Int)
   ;Exit
   ;  R0 = state (Joystick_HalfWordState)
   ;  R1 = switches (Bits)

XJoystick_CalibrateTopRight     *       &63F41
Joystick_CalibrateTopRight      *       &43F41

XJoystick_CalibrateBottomLeft   *       &63F42
Joystick_CalibrateBottomLeft    *       &43F42

        ]
        END
