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"
17 ; ------------------------------------------------------------------------
18 ; Header. Includes jump table
20 module_header _geos_stdjoy_joy
24 .byte $6A, $6F, $79 ; "joy"
25 .byte JOY_API_VERSION ; Driver API version number
31 ; Button state masks (8 values)
38 .byte $00 ; Future expansion
39 .byte $00 ; Future expansion
40 .byte $00 ; Future expansion
49 ; ------------------------------------------------------------------------
52 JOY_COUNT = 2 ; Number of joysticks we support
54 ; ------------------------------------------------------------------------
59 ; ------------------------------------------------------------------------
60 ; INSTALL routine. Is called after the driver is loaded into memory. If
61 ; possible, check if the hardware is present and determine the amount of
63 ; Must return an JOY_ERR_xx code in a/x.
69 ; rts ; Run into UNINSTALL instead
71 ; ------------------------------------------------------------------------
72 ; UNINSTALL routine. Is called before the driver is removed from memory.
73 ; Can do cleanup or whatever. Must not return anything.
79 ; ------------------------------------------------------------------------
80 ; COUNT: Return the total number of available joysticks in a/x.
88 ; ------------------------------------------------------------------------
89 ; READ: Read a particular joystick passed in A.
101 txa ; Joystick number into X