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"
16 ; ------------------------------------------------------------------------
17 ; Header. Includes jump table
19 module_header _pet_stdjoy_joy
23 .byte $6A, $6F, $79 ; "joy"
24 .byte JOY_API_VERSION ; Driver API version number
30 ; Button state masks (8 values)
37 .byte $00 ; JOY_FIRE2 unavailable
38 .byte $00 ; Future expansion
39 .byte $00 ; Future expansion
47 .addr 0 ; IRQ entry unused
49 ; ------------------------------------------------------------------------
52 JOY_COUNT = 2 ; Number of joysticks we support
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.
78 ; ------------------------------------------------------------------------
79 ; COUNT: Return the total number of available joysticks in a/x.
87 ; ------------------------------------------------------------------------
88 ; READ: Read a particular joystick passed in A.
92 tax ; Joystick number into X