git.sur5r.net Git - cc65/blob - libsrc/gamate/joy/gamate-stdjoy.s

   1
   2 ;
   3 ; Standard joystick driver for the Gamate
   4 ;
   5
   6         .include        "joy-kernel.inc"
   7         .include        "joy-error.inc"
   8         .include        "gamate.inc"
   9
  10         .macpack        module
  11
  12
  13 ; ------------------------------------------------------------------------
  14 ; Header. Includes jump table
  15
  16         module_header   _gamate_stdjoy_joy
  17
  18 ; Driver signature
  19
  20         .byte   $6A, $6F, $79           ; "joy"
  21         .byte   JOY_API_VERSION         ; Driver API version number
  22
  23 ; Library reference
  24
  25         .addr   $0000
  26
  27 ; Button state masks (8 values)
  28
  29         .byte   $01                     ; JOY_UP
  30         .byte   $02                     ; JOY_DOWN
  31         .byte   $04                     ; JOY_LEFT
  32         .byte   $08                     ; JOY_RIGHT
  33         .byte   $10                     ; JOY_FIRE_A
  34         .byte   $20                     ; JOY_FIRE_B
  35         .byte   $80                     ; JOY_SELECT
  36         .byte   $40                     ; JOY_START
  37
  38 ; Jump table.
  39
  40         .addr   INSTALL
  41         .addr   UNINSTALL
  42         .addr   COUNT
  43         .addr   READJOY
  44         .addr   0                       ; IRQ entry unused
  45
  46 ; ------------------------------------------------------------------------
  47 ; Constants
  48
  49 JOY_COUNT       = 1             ; Number of joysticks we support
  50
  51
  52 .code
  53
  54 ; ------------------------------------------------------------------------
  55 ; INSTALL routine. Is called after the driver is loaded into memory. If
  56 ; possible, check if the hardware is present and determine the amount of
  57 ; memory available.
  58 ; Must return an JOY_ERR_xx code in a/x.
  59 ;
  60
  61 INSTALL:
  62         lda     #<JOY_ERR_OK
  63         ldx     #>JOY_ERR_OK
  64
  65 ;        rts                     ; Run into UNINSTALL instead
  66
  67 ; ------------------------------------------------------------------------
  68 ; DEINSTALL routine. Is called before the driver is removed from memory.
  69 ; Can do cleanup or whatever. Must not return anything.
  70 ;
  71
  72 UNINSTALL:
  73         rts
  74
  75
  76 ; ------------------------------------------------------------------------
  77 ; COUNT: Return the total number of available joysticks in a/x.
  78 ;
  79 ;unsigned char __fastcall__ joy_count (void);
  80
  81 COUNT:
  82         lda     #<JOY_COUNT
  83         ldx     #>JOY_COUNT
  84         rts
  85
  86 ; ------------------------------------------------------------------------
  87 ; READ: Read a particular joystick passed in A.
  88 ;
  89 ;unsigned char __fastcall__ joy_read (unsigned char joystick);
  90
  91 READJOY:
  92         lda     JOY_DATA
  93         ldx     #0
  94         rts
  95