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1 | As PicoDrive is multiplatform emulator, this is GP2X specific part of readme\r |
2 | about configuration.\r |
3 | \r |
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4 | If you have questions, you can use GP32X to ask for help.\r |
5 | http://www.gp32x.com/board/index.php?showforum=48\r |
6 | \r |
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7 | \r |
8 | Configuration\r |
9 | -------------\r |
10 | \r |
11 | 1. "Renderer"\r |
12 | 8bit fast:\r |
13 | This enables alternative heavily optimized tile-based renderer, which renders\r |
14 | pixels not line-by-line (this is what accurate renderers do), but in 8x8 tiles,\r |
15 | which is much faster. But because of the way it works it can't render any\r |
16 | mid-frame image changes (raster effects), so it is useful only with some games.\r |
17 | \r |
18 | Other two are accurate line-based renderers. The 8bit is faster but does not\r |
19 | run well with some games like Street Racer.\r |
20 | \r |
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21 | 2. "Scaling"\r |
22 | "hw" means GP2X hardware scaler, which causes no performance loss, but scaled\r |
23 | image looks a bit blocky. "sw" means software scaling, which uses pixel\r |
24 | averaging and may look a bit nicer, but blurry. Horizontal scaling is only for\r |
25 | games which use so called "32 column mode" (256x224 or 256x240), and scales\r |
26 | image width to 320 pixels. Vertical scales height to 240 for games which use\r |
27 | height 224 (most of them).\r |
28 | \r |
29 | 3. "Accurate timing"\r |
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30 | This adds some more emulation precision, but slows the emulation down. Without\r |
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31 | this option some games do not boot (Red Zone for example), others have sound\r |
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32 | problems. This options has no effect for Sega/Mega CD emulation.\r |
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33 | \r |
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34 | 4. "Accurate sprites"\r |
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35 | This option improves emulation of sprite priorities, it also enables emulation\r |
36 | of sprite collision bit. If you see one sprite being drawn incorrectly above\r |
37 | the other (often seen in Sonic 3D Blast), you can enable this to fix the problem.\r |
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38 | This only works with the accurate renderers (see first option).\r |
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39 | \r |
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40 | 5. "Show FPS"\r |
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41 | Self-explanatory. Format is XX/YY, where XX is the number of rendered frames and\r |
42 | YY is the number of emulated frames per second.\r |
43 | \r |
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44 | 6. "Frameskip"\r |
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45 | How many frames to skip rendering before displaying another.\r |
46 | "Auto" is recommended.\r |
47 | \r |
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48 | 7. "Enable sound"\r |
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49 | Does what it says. You must enable at least YM2612 or SN76496 (in advanced options,\r |
50 | see below) for this to make sense.\r |
51 | \r |
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52 | 8. "Sound Quality"\r |
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53 | Sound rate and stereo mode. If you want 44100Hz sound, it is recommended to enable\r |
54 | the second core (next option).\r |
55 | \r |
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56 | 9. "Use ARM940 core for sound"\r |
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57 | This option causes PicoDrive to use ARM940T core (GP2X's second CPU) for sound \r |
58 | (i.e. to generate YM2612 samples) to improve performance noticeably.\r |
59 | \r |
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60 | 10. "6 button pad"\r |
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61 | If you enable this, games will think that 6 button gamepad is connected. If you\r |
62 | go and reconfigure your keys, you will be able to bind X,Y,Z and mode actions.\r |
63 | \r |
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64 | 11. "Region"\r |
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65 | This option lets you force the game to think it is running on machine from the\r |
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66 | specified region, or just to set autodetection order. Also affects Sega/Mega CD.\r |
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67 | \r |
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68 | 12. "Use SRAM/BRAM savestates"\r |
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69 | This will automatically read/write SRAM (or BRAM for Sega/Mega CD) savestates for\r |
70 | games which are using them. SRAM is saved whenever you pause your game or exit the\r |
71 | emulator.\r |
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72 | \r |
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73 | 13. "Confirm savestate"\r |
74 | Allows to enable confirmation on savestate saving (to prevent savestate overwrites),\r |
75 | on loading (to prevent destroying current game progress), and on both or none.\r |
76 | \r |
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77 | 14. "Save slot"\r |
78 | This is a slot number to use for savestates. This can also be configured to be\r |
79 | changed with a button (see "key configuration").\r |
80 | \r |
81 | 15. "GP2X CPU clocks"\r |
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82 | Here you can change clocks of both GP2X's CPUs. Larger values increase performance.\r |
83 | There is no separate option for the second CPU because both CPUs use the same clock\r |
84 | source. Setting this option to 200 will cause PicoDrive NOT to change GP2X's clocks\r |
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85 | at all (this is if you use external program to set clock).\r |
86 | \r |
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87 | 16. "[Sega/Mega CD options]"\r |
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88 | Enters Sega/Mega CD options menu (see below).\r |
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89 | \r |
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90 | 17. "[advanced options]"\r |
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91 | Enters advanced options menu (see below).\r |
92 | \r |
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93 | 18. "Save cfg as default"\r |
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94 | If you save your config here it will be loaded on next ROM load, but only if there\r |
95 | is no game specific config saved (which will be loaded in that case).\r |
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96 | You can press left/right to switch to a different config profile.\r |
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97 | \r |
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98 | 19. "Save cfg for current game only"\r |
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99 | Whenever you load current ROM again these settings will be loaded (squidgehack and\r |
100 | RAM settings will not take effect until emulator is restarted).\r |
101 | \r |
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102 | \r |
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103 | Advanced configuration\r |
104 | ----------------------\r |
105 | \r |
106 | Enter [advanced options] in config menu to see these options.\r |
107 | \r |
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108 | 1. "Gamma correction"\r |
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109 | Alters image gamma through GP2X hardware. Larger values make image to look brighter,\r |
110 | lower - darker (default is 1.0).\r |
111 | \r |
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112 | 2. "A_SN's gamma curve"\r |
113 | If this is enabled, different gamma adjustment method will be used (suggested by A_SN\r |
114 | from gp32x boards). Basically it makes difference for dark and bright colors.\r |
115 | \r |
116 | 3. "Perfect vsync"\r |
117 | This one adjusts the LCD refresh rate to better match game's refresh rate and starts\r |
118 | synchronizing rendering with it. Should make scrolling smoother and eliminate tearing.\r |
119 | \r |
120 | 4. "Emulate Z80"\r |
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121 | Enables emulation of Z80 chip, which was mostly used to drive the other sound chips.\r |
122 | Some games do complex sync with it, so you must enable it even if you don't use\r |
123 | sound to be able to play them.\r |
124 | \r |
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125 | 5. "Emulate YM2612 (FM)"\r |
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126 | This enables emulation of six-channel FM sound synthesizer chip, which was used to\r |
127 | produce sound effects and music.\r |
128 | \r |
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129 | 6. "Emulate SN76496 (PSG)"\r |
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130 | This enables emulation of additional sound chip for additional effects.\r |
131 | \r |
132 | Note: if you change sound settings AFTER loading a ROM, you may need to reset\r |
133 | game to get sound. This is because most games initialize sound chips on\r |
134 | startup, and this data is lost when sound chips are being enabled/disabled.\r |
135 | \r |
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136 | 7. "gzip savestates"\r |
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137 | This will always apply gzip compression on your savestates, allowing you to\r |
138 | save some space and load/save time.\r |
139 | \r |
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140 | 8. "Don't save last used ROM"\r |
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141 | This will disable writing last used ROM to config on exit (what might cause SD\r |
142 | card corruption according to DaveC).\r |
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143 | \r |
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144 | 9. "craigix's RAM timings"\r |
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145 | This overclocks the GP2X RAM chips, but may cause instability. Recommended if you\r |
146 | use the second core for sound. Needs emulator restart to take effect.\r |
147 | See this thread:\r |
148 | http://www.gp32x.com/board/index.php?showtopic=32319\r |
149 | \r |
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150 | 10. "squidgehack"\r |
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151 | Well known way to improve the GP2X performance. You must restart the emulator\r |
152 | for the change of this option to take effect.\r |
153 | \r |
154 | \r |
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155 | Sega/Mega CD options \r |
156 | --------------------\r |
157 | \r |
158 | 1,2,3. "USA/EUR/JAP BIOS"\r |
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159 | These options just show if your BIOS files were correctly detected by the\r |
160 | emulator (it shows the filename it is using). If so, you can press Start to\r |
161 | test your BIOS.\r |
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162 | \r |
163 | 4. "CD LEDs"\r |
164 | The Sega/Mega CD unit had two blinking LEDs (red and green) on it. This option\r |
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165 | will display them on top-left corner of the screen.\r |
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166 | \r |
167 | 5. "CDDA audio (using mp3s)"\r |
168 | This option enables CD audio playback.\r |
169 | \r |
170 | 6. "PCM audio"\r |
171 | This enables 8 channel PCM sound source. It is required for some games to run,\r |
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172 | because they monitor state of this audio chip.\r |
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173 | \r |
174 | 7. "ReadAhead buffer"\r |
175 | This option is for dealing with slow SD card access in GP2X, which makes FMV\r |
176 | games unplayable. It will allow emulator not to access SD card for longer periods\r |
177 | of time, but it will take more time to fill the buffer.\r |
178 | \r |
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179 | 8. "Save RAM cart"\r |
180 | Here you can enable 64K RAM cart. Format it in BIOS if you do.\r |
181 | \r |
182 | 9. "Scale/Rot. fx"\r |
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183 | The Sega/Mega CD had scaling/rotation chip, which allows effects similar to\r |
184 | "Mode 7" effects in SNES. Unfortunately emulating it is slow, and very few games\r |
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185 | used it, so it's better to disable this option, unless game really needs it.\r |
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186 | \r |
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187 | 10. "Better sync"\r |
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188 | This option is similar to "Perfect synchro" in Gens. Some games require it to run,\r |
189 | for example most (all?) Wolfteam games, and some other ones. Don't use it for\r |
190 | games which don't need it, it will just slow them down.\r |
191 | \r |
192 | \r |
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193 | Key configuration\r |
194 | -----------------\r |
195 | \r |
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196 | Select "Configure controls" from the main menu. Then select "Player 1" and you will\r |
197 | see two columns. The left column lists names of Genesis/MD controller buttons, and\r |
198 | the right GP2X ones, which are assigned to them. If you bind 2 different GP2X buttons\r |
199 | to the same action, you will get a combo (which means that you will have to press\r |
200 | both buttons for that action to happen.\r |
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201 | \r |