2 ; Standard joystick driver for the C64. May be used multiple times when linked
3 ; to the statically application.
5 ; Ullrich von Bassewitz, 2002-12-20
8 .include "zeropage.inc"
9 .include "joy-kernel.inc"
10 .include "joy-error.inc"
11 .include "geossym.inc"
15 ; ------------------------------------------------------------------------
16 ; Header. Includes jump table
22 .byte $6A, $6F, $79 ; "joy"
23 .byte JOY_API_VERSION ; Driver API version number
25 ; Button state masks (8 values)
32 .byte $00 ; Future expansion
33 .byte $00 ; Future expansion
34 .byte $00 ; Future expansion
43 ; ------------------------------------------------------------------------
46 JOY_COUNT = 2 ; Number of joysticks we support
48 ; ------------------------------------------------------------------------
53 ; ------------------------------------------------------------------------
54 ; INSTALL routine. Is called after the driver is loaded into memory. If
55 ; possible, check if the hardware is present and determine the amount of
57 ; Must return an JOY_ERR_xx code in a/x.
63 ; rts ; Run into UNINSTALL instead
65 ; ------------------------------------------------------------------------
66 ; UNINSTALL routine. Is called before the driver is removed from memory.
67 ; Can do cleanup or whatever. Must not return anything.
73 ; ------------------------------------------------------------------------
74 ; COUNT: Return the total number of available joysticks in a/x.
82 ; ------------------------------------------------------------------------
83 ; READ: Read a particular joystick passed in A.
95 txa ; Joystick number into X