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   $0000
  26
  27 ; Jump table.
  28
  29         .addr   INSTALL
  30         .addr   UNINSTALL
  31         .addr   COUNT
  32         .addr   READJOY
  33         .addr   0                       ; IRQ entry unused
  34
  35 ; ------------------------------------------------------------------------
  36 ; Constants
  37
  38 JOY_COUNT       = 1             ; Number of joysticks we support
  39
  40
  41 .code
  42
  43 ; ------------------------------------------------------------------------
  44 ; INSTALL routine. Is called after the driver is loaded into memory. If
  45 ; possible, check if the hardware is present and determine the amount of
  46 ; memory available.
  47 ; Must return an JOY_ERR_xx code in a/x.
  48 ;
  49
  50 INSTALL:
  51         lda     #<JOY_ERR_OK
  52         ldx     #>JOY_ERR_OK
  53
  54 ;        rts                     ; Run into UNINSTALL instead
  55
  56 ; ------------------------------------------------------------------------
  57 ; DEINSTALL routine. Is called before the driver is removed from memory.
  58 ; Can do cleanup or whatever. Must not return anything.
  59 ;
  60
  61 UNINSTALL:
  62         rts
  63
  64
  65 ; ------------------------------------------------------------------------
  66 ; COUNT: Return the total number of available joysticks in a/x.
  67 ;
  68 ;unsigned char __fastcall__ joy_count (void);
  69
  70 COUNT:
  71         lda     #<JOY_COUNT
  72         ldx     #>JOY_COUNT
  73         rts
  74
  75 ; ------------------------------------------------------------------------
  76 ; READ: Read a particular joystick passed in A.
  77 ;
  78 ;unsigned char __fastcall__ joy_read (unsigned char joystick);
  79
  80 READJOY:
  81         lda     JOY_DATA
  82         eor     #$FF
  83         ldx     #0
  84         rts
  85