2 ; Standard joypad driver for the NES. May be used multiple times when
3 ; linked to the statically application.
5 ; Ullrich von Bassewitz, 2003-05-02
6 ; Stefan Haubenthal, 2004-10-05
9 .include "zeropage.inc"
11 .include "joy-kernel.inc"
12 .include "joy-error.inc"
18 ; ------------------------------------------------------------------------
19 ; Header. Includes jump table
21 module_header _nes_stdjoy_joy
25 .byte $6A, $6F, $79 ; "joy"
26 .byte JOY_API_VERSION ; Driver API version number
38 .addr 0 ; IRQ entry unused
40 ; ------------------------------------------------------------------------
43 JOY_COUNT = 2 ; Number of joysticks we support
48 ; ------------------------------------------------------------------------
49 ; INSTALL routine. Is called after the driver is loaded into memory. If
50 ; possible, check if the hardware is present and determine the amount of
52 ; Must return an JOY_ERR_xx code in a/x.
58 ; rts ; Run into UNINSTALL instead
60 ; ------------------------------------------------------------------------
61 ; UNINSTALL routine. Is called before the driver is removed from memory.
62 ; Can do cleanup or whatever. Must not return anything.
69 ; ------------------------------------------------------------------------
70 ; COUNT: Return the total number of available joysticks in a/x.
78 ; ------------------------------------------------------------------------
79 ; READ: Read a particular joystick passed in A.
83 and #$01 ; Fix joystick number
84 tay ; Joystick number (0,1) into Y
101 ; ldx #$00 ; X implicitly fixed