tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Pacbox - a Pacman Emulator for Rockbox
11 *
12 * Based on PIE - Pacman Instructional Emulator
13 *
14 * Copyright (c) 1997-2003,2004 Alessandro Scotti
15 * http://www.ascotti.org/
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version 2
20 * of the License, or (at your option) any later version.
21 *
22 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
23 * KIND, either express or implied.
24 *
25 ****************************************************************************/
26
27#ifndef _HARDWARE_H
28#define _HARDWARE_H
29
30extern unsigned char ram_[20*1024]; // ROM (16K) and RAM (4K)
31extern unsigned char charset_rom_[4*1024]; // Character set ROM (4K)
32extern unsigned char spriteset_rom_[4*1024]; // Sprite set ROM (4K)
33extern unsigned char dirty_[1024];
34extern unsigned char video_mem_[1024]; // Video memory (1K)
35extern unsigned char color_mem_[1024]; // Color memory (1K)
36extern unsigned char charmap_[256*8*8]; /* Character data for 256 8x8 characters */
37extern unsigned char spritemap_[64*16*16]; /* Sprite data for 64 16x16 sprites */
38extern unsigned char output_devices_; /* Output flip-flops set by the game program */
39extern unsigned char interrupt_vector_;
40extern unsigned coin_counter_;
41extern unsigned char port1_;
42extern unsigned char port2_;
43extern unsigned char dip_switches_;
44
45/* Output flip-flops */
46enum {
47 FlipScreen = 0x01,
48 PlayerOneLight = 0x02,
49 PlayerTwoLight = 0x04,
50 InterruptEnabled = 0x08,
51 SoundEnabled = 0x10,
52 CoinLockout = 0x20,
53 CoinMeter = 0x40,
54 AuxBoardEnabled = 0x80
55};
56
57struct PacmanSprite
58{
59 int mode; /** Display mode (normal or flipped) */
60 int x; /** X coordinate */
61 int y; /** Y coordinate */
62 int n; /** Shape (from 0 to 63) */
63 int color; /** Base color (0=not visible) */
64};
65
66/* Internal tables and structures for faster access to data */
67extern struct PacmanSprite sprites_[8]; /* Sprites */
68extern short vchar_to_i_[1024];
69
70void writeByte(unsigned addr, unsigned char b);
71unsigned char readPort( unsigned port );
72void writePort( unsigned addr, unsigned char b );
73void setOutputFlipFlop( unsigned char bit, unsigned char value );
74
75/*
76 For Z80 Environment: read a byte from high memory addresses (i.e. the
77 memory-mapped registers)
78*/
79static inline unsigned char readByte( unsigned addr )
80{
81 addr &= 0xFFFF;
82
83 if (addr < sizeof(ram_))
84 return ram_[addr];
85
86 // Address is not in RAM, check to see if it's a memory mapped register
87 switch( addr & 0xFFC0 ) {
88 // IN0
89 case 0x5000:
90 // bit 0 : up
91 // bit 1 : left
92 // bit 2 : right
93 // bit 3 : down
94 // bit 4 : switch: advance to next level
95 // bit 5 : coin 1
96 // bit 6 : coin 2
97 // bit 7 : credit (same as coin but coin counter is not incremented)
98 return port1_;
99 // IN1
100 case 0x5040:
101 // bit 0 : up (2nd player)
102 // bit 1 : left (2nd player)
103 // bit 2 : right (2nd player)
104 // bit 3 : down (2nd player)
105 // bit 4 : switch: rack test -> 0x10=off, 0=on
106 // bit 5 : start 1
107 // bit 6 : start 2
108 // bit 7 : cabinet -> 0x80=upright, 0x00=table
109 return port2_;
110 // DSW1
111 case 0x5080:
112 // bits 0,1 : coinage -> 0=free play, 1=1 coin/play, 2=1 coin/2 play, 3=2 coin/1 play
113 // bits 2,3 : lives -> 0x0=1, 0x4=2, 0x8=3, 0xC=5
114 // bits 4,5 : bonus life -> 0=10000, 0x10=15000, 0x20=20000, 0x30=none
115 // bit 6 : jumper pad: difficulty -> 0x40=normal, 0=hard
116 // bit 7 : jumper pad: ghost name -> 0x80=normal, 0=alternate
117 return dip_switches_;
118 // Watchdog reset
119 case 0x50C0:
120 break;
121 }
122
123 return 0xFF;
124}
125
126/* Reads a 16 bit word from memory at the specified address. */
127static inline unsigned readWord( unsigned addr ) {
128 addr &= 0xFFFF;
129
130 if (addr < (sizeof(ram_)-1)) {
131 return ram_[addr] | ((ram_[addr+1]) << 8);
132 } else {
133 return readByte(addr) | (((unsigned)readByte(addr+1)) << 8);
134 }
135}
136
137/* Writes a 16 bit word to memory at the specified address. */
138static inline void writeWord( unsigned addr, unsigned value ) {
139 writeByte( addr, value & 0xFF );
140 writeByte( addr+1, (value >> 8) & 0xFF );
141}
142
143#endif