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
29 ; Button state masks (8 values)
36 .byte $00 ; Future expansion
37 .byte $00 ; Future expansion
38 .byte $00 ; Future expansion
47 ; ------------------------------------------------------------------------
50 JOY_COUNT = 2 ; Number of joysticks we support
52 ; ------------------------------------------------------------------------
57 ; ------------------------------------------------------------------------
58 ; INSTALL routine. Is called after the driver is loaded into memory. If
59 ; possible, check if the hardware is present and determine the amount of
61 ; Must return an JOY_ERR_xx code in a/x.
67 ; rts ; Run into UNINSTALL instead
69 ; ------------------------------------------------------------------------
70 ; UNINSTALL routine. Is called before the driver is removed from memory.
71 ; Can do cleanup or whatever. Must not return anything.
77 ; ------------------------------------------------------------------------
78 ; COUNT: Return the total number of available joysticks in a/x.
86 ; ------------------------------------------------------------------------
87 ; READ: Read a particular joystick passed in A.
99 txa ; Joystick number into X