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

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