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1 | As PicoDrive is multiplatform emulator, this is GP2X specific part of readme\r |
2 | about configuration.\r |
3 | \r |
4 | \r |
5 | Configuration\r |
6 | -------------\r |
7 | \r |
8 | 1. "Renderer"\r |
9 | 8bit fast:\r |
10 | This enables alternative heavily optimized tile-based renderer, which renders\r |
11 | pixels not line-by-line (this is what accurate renderers do), but in 8x8 tiles,\r |
12 | which is much faster. But because of the way it works it can't render any\r |
13 | mid-frame image changes (raster effects), so it is useful only with some games.\r |
14 | \r |
15 | Other two are accurate line-based renderers. The 8bit is faster but does not\r |
16 | run well with some games like Street Racer.\r |
17 | \r |
18 | 2. "Accurate timing"\r |
19 | This adds some more emulation precision, but slows the emulation down. Whithout\r |
20 | this option some games do not boot (Red Zone for example), others have sound\r |
21 | problems.\r |
22 | \r |
23 | 3. "Accurate sprites"\r |
24 | This option improves emulation of sprite priorities, it also enables emulation\r |
25 | of sprite collision bit. If you see one sprite being drawn incorrectly above\r |
26 | the other (often seen in Sonic 3D Blast), you can enable this to fix the problem.\r |
27 | This only works with the default renderer (see first option).\r |
28 | \r |
29 | 4. "Show FPS"\r |
30 | Self-explanatory. Format is XX/YY, where XX is the number of rendered frames and\r |
31 | YY is the number of emulated frames per second.\r |
32 | \r |
33 | 5. "Frameskip"\r |
34 | How many frames to skip rendering before displaying another.\r |
35 | "Auto" is recommended.\r |
36 | \r |
37 | 6. "Enable sound"\r |
38 | Does what it says. You must enable at least YM2612 or SN76496 (in advanced options,\r |
39 | see below) for this to make sense.\r |
40 | \r |
41 | 7. "Sound Quality"\r |
42 | Sound rate and stereo mode. If you want 44100Hz sound, it is recommended to enable\r |
43 | the second core (next option).\r |
44 | \r |
45 | 8. "Use ARM940 core for sound"\r |
46 | This option causes PicoDrive to use ARM940T core (GP2X's second CPU) for sound \r |
47 | (i.e. to generate YM2612 samples) to improve performance noticeably.\r |
48 | \r |
49 | 9. "6 button pad"\r |
50 | If you enable this, games will think that 6 button gamepad is connected. If you\r |
51 | go and reconfigure your keys, you will be able to bind X,Y,Z and mode actions.\r |
52 | \r |
53 | 10. "Genesis Region"\r |
54 | This option lets you force the game to think it is running on machine from the\r |
55 | specified region.\r |
56 | \r |
57 | 11. "Use SRAM savestates"\r |
58 | This will automatically read/write SRAM savestates for games which are using them.\r |
59 | SRAM is saved whenever you pause your game or exit the emulator.\r |
60 | \r |
61 | 12. "GP2X CPU clocks"\r |
62 | Here you can change clocks of both GP2X's CPUs. Larger values increase performance.\r |
63 | There is no separate option for the second CPU because both CPUs use the same clock\r |
64 | source. Setting this option to 200 will cause PicoDrive NOT to change GP2X's clocks\r |
65 | at all.\r |
66 | \r |
67 | 13. "[advanced options]"\r |
68 | Enters advanced options menu (see below).\r |
69 | \r |
70 | 14. "Save cfg as default"\r |
71 | If you save your config here it will be loaded on next ROM load, but only if there\r |
72 | is no game specific config saved (which will be loaded in that case).\r |
73 | \r |
74 | 15. "Save cfg for current game only"\r |
75 | Whenever you load current ROM again these settings will be loaded (squidgehack and\r |
76 | RAM settings will not take effect until emulator is restarted).\r |
77 | \r |
78 | Advanced configuration\r |
79 | ----------------------\r |
80 | \r |
81 | Enter [advanced options] in config menu to see these options.\r |
82 | \r |
83 | 1. "Scale 32 column mode"\r |
84 | This enables hardware scaling for lower-res genesis mode (where width is\r |
85 | 32 8-pixel tiles, instead of 40 in other mode).\r |
86 | \r |
87 | 2. "Gamma correction"\r |
88 | Alters image gamma through GP2X hardware. Larger values make image to look brighter,\r |
89 | lower - darker (default is 1.0).\r |
90 | \r |
91 | 3. "Emulate Z80"\r |
92 | Enables emulation of Z80 chip, which was mostly used to drive the other sound chips.\r |
93 | Some games do complex sync with it, so you must enable it even if you don't use\r |
94 | sound to be able to play them.\r |
95 | \r |
96 | 4. "Emulate YM2612 (FM)"\r |
97 | This enables emulation of six-channel FM sound synthesizer chip, which was used to\r |
98 | produce sound effects and music.\r |
99 | \r |
100 | 5. "Emulate SN76496 (PSG)"\r |
101 | This enables emulation of additional sound chip for additional effects.\r |
102 | \r |
103 | Note: if you change sound settings AFTER loading a ROM, you may need to reset\r |
104 | game to get sound. This is because most games initialize sound chips on\r |
105 | startup, and this data is lost when sound chips are being enabled/disabled.\r |
106 | \r |
107 | 6. "gzip savestates"\r |
108 | This will always apply gzip compression on your savestates, allowing you to\r |
109 | save some space and load/save time.\r |
110 | \r |
111 | 7. "USB joy controls player X"\r |
112 | If you are able to use USB joysticks with your GP2X, this options selects which\r |
113 | player the joystick controls.\r |
114 | \r |
115 | 8. "Don't save config on exit"\r |
116 | This will disable config autowrite on exit (which might cause SD card corruption\r |
117 | according to DaveC).\r |
118 | \r |
119 | 9. "craigix's RAM timings"\r |
120 | This overclocks the GP2X RAM chips, but may cause instability. Recommended if you\r |
121 | use the second core for sound. Needs emulator restart to take effect.\r |
122 | See this thread:\r |
123 | http://www.gp32x.com/board/index.php?showtopic=32319\r |
124 | \r |
125 | 10. "squidgehack"\r |
126 | Well known way to improve the GP2X performance. You must restart the emulator\r |
127 | for the change of this option to take effect.\r |
128 | \r |
129 | \r |
130 | Key configuration\r |
131 | -----------------\r |
132 | \r |
133 | When you select "Configure controls" from the menu, you enter a key configuration\r |
134 | mode, where you use SELECT to change an action, and then press a key you like to\r |
135 | bind to that action. You can press the same key again to unbind. Select "DONE"\r |
136 | action and press any key to finish.\r |
137 | \r |
138 | \r |