2 ; Standard PET userport joystick driver for the PET
4 ; Marco van den Heuvel, 2010-01-23
7 .include "zeropage.inc"
9 .include "joy-kernel.inc"
10 .include "joy-error.inc"
14 ; ------------------------------------------------------------------------
15 ; Header. Includes jump table
21 .byte $6A, $6F, $79 ; "joy"
22 .byte JOY_API_VERSION ; Driver API version number
24 ; Button state masks (8 values)
31 .byte $00 ; JOY_FIRE2 unavailable
32 .byte $00 ; Future expansion
33 .byte $00 ; Future expansion
41 .addr 0 ; IRQ entry unused
43 ; ------------------------------------------------------------------------
46 JOY_COUNT = 2 ; Number of joysticks we support
51 ; ------------------------------------------------------------------------
52 ; INSTALL routine. Is called after the driver is loaded into memory. If
53 ; possible, check if the hardware is present and determine the amount of
55 ; Must return an JOY_ERR_xx code in a/x.
61 ; rts ; Run into UNINSTALL instead
63 ; ------------------------------------------------------------------------
64 ; UNINSTALL routine. Is called before the driver is removed from memory.
65 ; Can do cleanup or whatever. Must not return anything.
72 ; ------------------------------------------------------------------------
73 ; COUNT: Return the total number of available joysticks in a/x.
81 ; ------------------------------------------------------------------------
82 ; READ: Read a particular joystick passed in A.
86 tax ; Joystick number into X