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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 * All files in this archive are subject to the GNU General Public License.
18 * See the file COPYING in the source tree root for full license agreement.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ****************************************************************************/
24
25#ifndef ARCADE_H_
26#define ARCADE_H_
27
28#include "plugin.h"
29#include "z80.h"
30#include "hardware.h"
31
32extern fb_data palette[256]; /* Color palette in native Rockbox format */
33
34/**
35 Pacman sprite properties.
36
37 This information is only needed by applications that want to do their own
38 sprite rendering, as the renderVideo() function already draws the sprites.
39
40 @see PacmanMachine::renderVideo
41*/
42
43/** Machine hardware data */
44enum {
45 ScreenWidth = 224,
46 ScreenHeight = 288,
47 ScreenWidthChars = 28,
48 ScreenHeightChars = 36,
49 CharWidth = 8,
50 CharHeight = 8,
51 VideoFrequency = 60,
52 CpuClock = 3072000,
53 SoundClock = 96000, // CPU clock divided by 32
54 CpuCyclesPerFrame = CpuClock / VideoFrequency
55};
56
57/** Input devices and switches */
58enum InputDevice {
59 Joy1_Up = 0,
60 Joy1_Left,
61 Joy1_Right,
62 Joy1_Down,
63 Switch_RackAdvance,
64 CoinSlot_1,
65 CoinSlot_2,
66 Switch_AddCredit,
67 Joy2_Up,
68 Joy2_Left,
69 Joy2_Right,
70 Joy2_Down,
71 Switch_Test,
72 Key_OnePlayer,
73 Key_TwoPlayers,
74 Switch_CocktailMode
75};
76
77/** Input device mode */
78enum InputDeviceMode {
79 DeviceOn,
80 DevicePushed = DeviceOn,
81 DeviceOff,
82 DeviceReleased = DeviceOff,
83 DeviceToggle
84};
85
86/** DIP switches */
87enum {
88 DipPlay_Free = 0x00, // Coins per play
89 DipPlay_OneCoinOneGame = 0x01,
90 DipPlay_OneCoinTwoGames = 0x02,
91 DipPlay_TwoCoinsOneGame = 0x03,
92 DipPlay_Mask = 0x03,
93 DipLives_1 = 0x00, // Lives per game
94 DipLives_2 = 0x04,
95 DipLives_3 = 0x08,
96 DipLives_5 = 0x0C,
97 DipLives_Mask = 0x0C,
98 DipBonus_10000 = 0x00, // Bonus life
99 DipBonus_15000 = 0x10,
100 DipBonus_20000 = 0x20,
101 DipBonus_None = 0x30,
102 DipBonus_Mask = 0x30,
103 DipDifficulty_Normal = 0x40, // Difficulty
104 DipDifficulty_Hard = 0x00,
105 DipDifficulty_Mask = 0x40,
106 DipGhostNames_Normal = 0x80, // Ghost names
107 DipGhostNames_Alternate = 0x00,
108 DipGhostNames_Mask = 0x80,
109 DipMode_Play = 0x0000, // Play/test mode
110 DipMode_Test = 0x0100,
111 DipMode_Mask = 0x0100,
112 DipCabinet_Upright = 0x0000, // Cabinet upright/cocktail
113 DipCabinet_Cocktail = 0x0200,
114 DipCabinet_Mask = 0x0200,
115 DipRackAdvance_Off = 0x0000, // Automatic level advance
116 DipRackAdvance_Auto = 0x0400,
117 DipRackAdvance_Mask = 0x0400
118};
119
120void init_PacmanMachine(int dip);
121int run(void);
122void reset_PacmanMachine(void);
123void decodeROMs(void);
124
125/**
126 Tells the emulator that the status of an input device has changed.
127*/
128void setDeviceMode( enum InputDevice device, enum InputDeviceMode mode );
129
130/**
131 Returns the value of the DIP switches.
132*/
133unsigned getDipSwitches(void);
134
135/**
136 Sets the value of the DIP switches that control several game settings
137 (see the Dip... constants above).
138
139 Most of the DIP switches are read at program startup and take effect
140 only after a machine reset.
141*/
142void setDipSwitches( unsigned value );
143
144/**
145 Draws the current video into the specified buffer.
146
147 The buffer must be at least 224*288 bytes long. Pixels are stored in
148 left-to-right/top-to-bottom order starting from the upper left corner.
149 There is one byte per pixel, containing an index into the color palette
150 returned by getPalette().
151
152 It's up to the application to display the buffer to the user. The
153 code might look like this:
154 <BLOCKQUOTE>
155 <PRE>
156 @@ unsigned char video_buffer[ PacmanMachine::ScreenWidth * PacmanMachine::ScreenHeight ];
157 @@ unsigned char * vbuf = video_buffer;
158 @@ const unsigned * palette = arcade.getPalette();
159 @@
160 @@ arcade.renderVideo( vbuf );
161 @@
162 @@ for( int y=0; y<PacmanMachine::ScreenHeight; y++ ) {
163 @@ for( int x=0; x<PacmanMachine::ScreenWidth; x++ ) {
164 @@ unsigned color = palette[ *vbuf++ ];
165 @@ unsigned char red = color & 0xFF;
166 @@ unsigned char green = (color >> 8) & 0xFF;
167 @@ unsigned char blue = (color >> 16) & 0xFF;
168 @@
169 @@ setPixel( x, y, red, green, blue );
170 @@ }
171 @@ }
172 </PRE>
173 </BLOCKQUOTE>
174
175*/
176bool renderBackground( unsigned char * buffer );
177void renderSprites( unsigned char * buffer );
178
179/**
180 Enables/disables a common speed hack that allows Pacman to
181 move four times faster than the ghosts.
182
183 @param enabled true to enabled the hack, false to disable
184
185 @return 0 if successful, otherwise the patch could not be applied
186 (probably because the loaded ROM set does not support it)
187*/
188int setSpeedHack( int enabled );
189
190/* Implementation of the Z80 Environment interface */
191unsigned char readByteHigh( unsigned addr );
192
193void writeByte( unsigned, unsigned char );
194
195unsigned char readPort( unsigned port );
196
197void writePort( unsigned, unsigned char );
198
199#endif // ARCADE_H_
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