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Annotation of uae/src/od-amiga/joystick.c, revision 1.1.1.1

1.1       root        1:  /* 
                      2:   * UAE - The Un*x Amiga Emulator
                      3:   * 
                      4:   * Joystick emulation for AmigaOS
                      5:   * 
                      6:   * Copyright 1996, 1997 Samuel Devulder
                      7:   */
                      8: 
                      9: #include "sysconfig.h"
                     10: #include "sysdeps.h"
                     11: 
                     12: #include "config.h"
                     13: #include "options.h"
                     14: #include "memory.h"
                     15: #include "custom.h"
                     16: #include "joystick.h"
                     17: 
                     18: int nr_joysticks;
                     19: 
                     20: #include <hardware/custom.h>
                     21: #include <hardware/cia.h>
                     22: 
                     23: #define CIAAPRA 0xBFE001 
                     24: #define CUSTOM  0xDFF000
                     25: 
                     26: static struct Custom *custom= (struct Custom*) CUSTOM;
                     27: static struct CIA *cia = (struct CIA *) CIAAPRA;
                     28: 
                     29: void read_joystick(int nr, unsigned int *dir, int *button)
                     30: {
                     31:     int bot, right, top, left, joy,fire;
                     32:     
                     33:     *dir = 0;
                     34:     *button = 0;
                     35:     if (nr >= nr_joysticks) return;
                     36: 
                     37:     joy   = custom->joy1dat;
                     38:     fire  = !( cia->ciapra & 0x0080 ) ? 1 : 0;
                     39: 
                     40:     right = (joy & 0x0002) ? 1 : 0;
                     41:     left  = (joy & 0x0200) ? 1 : 0;
                     42:     bot   = (joy & 0x0001) ? 1 : 0;
                     43:     top   = (joy & 0x0100) ? 1 : 0;
                     44:     
                     45:     *button = fire;
                     46:     *dir = bot | (right << 1) | (top << 8) | (left << 9);
                     47: }
                     48: 
                     49: void init_joystick(void)
                     50: {
                     51:     nr_joysticks = 1;
                     52: }
                     53: 
                     54: void close_joystick(void)
                     55: {
                     56: }
                     57: 

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