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portable documentation
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@269 be3aeb3a-fb24-0410-a615-afba39da0efa
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3 changed files with 811 additions and 202 deletions
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@ -208,6 +208,12 @@ testrefr.gpe : test.o gp2x.o
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../common/helix/helix_mp3.a:
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make -C ../common/helix
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readme.txt: ../../tools/textfilter ../base_readme.txt
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../../tools/textfilter ../base_readme.txt $@ GP2X
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../../tools/textfilter: ../../tools/textfilter.c
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make -C ../../tools/ textfilter
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# cleanup
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clean: tidy
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@ -228,7 +234,7 @@ $(error need VER)
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endif
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endif
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rel: PicoDrive.gpe code940/pico940.bin ../readme.txt config.txt PicoDrive.man.txt PicoDrive.png
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rel: PicoDrive.gpe code940/pico940.bin readme.txt PicoDrive.man.txt PicoDrive.png
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zip -9 -j ../../PicoDrive_$(VER).zip $^ mmuhack.o
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zip -9 -r ../../PicoDrive_$(VER).zip skin -i \*.png -i \*.txt
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201
gp2x/config.txt
201
gp2x/config.txt
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@ -1,201 +0,0 @@
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As PicoDrive is multiplatform emulator, this is GP2X specific part of readme
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about configuration.
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If you have questions, you can use GP32X to ask for help.
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http://www.gp32x.com/board/index.php?showforum=48
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Configuration
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-------------
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1. "Renderer"
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8bit fast:
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This enables alternative heavily optimized tile-based renderer, which renders
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pixels not line-by-line (this is what accurate renderers do), but in 8x8 tiles,
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which is much faster. But because of the way it works it can't render any
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mid-frame image changes (raster effects), so it is useful only with some games.
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Other two are accurate line-based renderers. The 8bit is faster but does not
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run well with some games like Street Racer.
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2. "Scaling"
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"hw" means GP2X hardware scaler, which causes no performance loss, but scaled
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image looks a bit blocky. "sw" means software scaling, which uses pixel
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averaging and may look a bit nicer, but blurry. Horizontal scaling is only for
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games which use so called "32 column mode" (256x224 or 256x240), and scales
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image width to 320 pixels. Vertical scales height to 240 for games which use
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height 224 (most of them).
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3. "Accurate timing"
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This adds some more emulation precision, but slows the emulation down. Without
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this option some games do not boot (Red Zone for example), others have sound
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problems. This options has no effect for Sega/Mega CD emulation.
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4. "Accurate sprites"
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This option improves emulation of sprite priorities, it also enables emulation
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of sprite collision bit. If you see one sprite being drawn incorrectly above
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the other (often seen in Sonic 3D Blast), you can enable this to fix the problem.
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This only works with the accurate renderers (see first option).
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5. "Show FPS"
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Self-explanatory. Format is XX/YY, where XX is the number of rendered frames and
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YY is the number of emulated frames per second.
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6. "Frameskip"
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How many frames to skip rendering before displaying another.
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"Auto" is recommended.
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7. "Enable sound"
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Does what it says. You must enable at least YM2612 or SN76496 (in advanced options,
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see below) for this to make sense.
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8. "Sound Quality"
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Sound rate and stereo mode. If you want 44100Hz sound, it is recommended to enable
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the second core (next option).
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9. "Use ARM940 core for sound"
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This option causes PicoDrive to use ARM940T core (GP2X's second CPU) for sound
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(i.e. to generate YM2612 samples) to improve performance noticeably.
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10. "6 button pad"
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If you enable this, games will think that 6 button gamepad is connected. If you
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go and reconfigure your keys, you will be able to bind X,Y,Z and mode actions.
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11. "Region"
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This option lets you force the game to think it is running on machine from the
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specified region, or just to set autodetection order. Also affects Sega/Mega CD.
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12. "Use SRAM/BRAM savestates"
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This will automatically read/write SRAM (or BRAM for Sega/Mega CD) savestates for
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games which are using them. SRAM is saved whenever you pause your game or exit the
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emulator.
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13. "Confirm savestate"
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Allows to enable confirmation on savestate saving (to prevent savestate overwrites),
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on loading (to prevent destroying current game progress), and on both or none.
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14. "Save slot"
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This is a slot number to use for savestates. This can also be configured to be
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changed with a button (see "key configuration").
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15. "GP2X CPU clocks"
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Here you can change clocks of both GP2X's CPUs. Larger values increase performance.
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There is no separate option for the second CPU because both CPUs use the same clock
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source. Setting this option to 200 will cause PicoDrive NOT to change GP2X's clocks
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at all (this is if you use external program to set clock).
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16. "[Sega/Mega CD options]"
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Enters Sega/Mega CD options menu (see below).
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17. "[advanced options]"
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Enters advanced options menu (see below).
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18. "Save cfg as default"
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If you save your config here it will be loaded on next ROM load, but only if there
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is no game specific config saved (which will be loaded in that case).
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You can press left/right to switch to a different config profile.
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19. "Save cfg for current game only"
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Whenever you load current ROM again these settings will be loaded (squidgehack and
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RAM settings will not take effect until emulator is restarted).
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Advanced configuration
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----------------------
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Enter [advanced options] in config menu to see these options.
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1. "Gamma correction"
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Alters image gamma through GP2X hardware. Larger values make image to look brighter,
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lower - darker (default is 1.0).
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2. "A_SN's gamma curve"
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If this is enabled, different gamma adjustment method will be used (suggested by A_SN
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from gp32x boards). Basically it makes difference for dark and bright colors.
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3. "Perfect vsync"
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This one adjusts the LCD refresh rate to better match game's refresh rate and starts
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synchronizing rendering with it. Should make scrolling smoother and eliminate tearing.
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4. "Emulate Z80"
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Enables emulation of Z80 chip, which was mostly used to drive the other sound chips.
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Some games do complex sync with it, so you must enable it even if you don't use
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sound to be able to play them.
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5. "Emulate YM2612 (FM)"
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This enables emulation of six-channel FM sound synthesizer chip, which was used to
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produce sound effects and music.
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6. "Emulate SN76496 (PSG)"
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This enables emulation of additional sound chip for additional effects.
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Note: if you change sound settings AFTER loading a ROM, you may need to reset
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game to get sound. This is because most games initialize sound chips on
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startup, and this data is lost when sound chips are being enabled/disabled.
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7. "gzip savestates"
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This will always apply gzip compression on your savestates, allowing you to
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save some space and load/save time.
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8. "Don't save last used ROM"
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This will disable writing last used ROM to config on exit (what might cause SD
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card corruption according to DaveC).
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9. "craigix's RAM timings"
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This overclocks the GP2X RAM chips, but may cause instability. Recommended if you
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use the second core for sound. Needs emulator restart to take effect.
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See this thread:
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http://www.gp32x.com/board/index.php?showtopic=32319
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10. "squidgehack"
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Well known way to improve the GP2X performance. You must restart the emulator
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for the change of this option to take effect.
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Sega/Mega CD options
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--------------------
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1,2,3. "USA/EUR/JAP BIOS"
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These options just show if your BIOS files were correctly detected by the
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emulator (it shows the filename it is using). If so, you can press Start to
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test your BIOS.
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4. "CD LEDs"
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The Sega/Mega CD unit had two blinking LEDs (red and green) on it. This option
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will display them on top-left corner of the screen.
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5. "CDDA audio (using mp3s)"
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This option enables CD audio playback.
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6. "PCM audio"
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This enables 8 channel PCM sound source. It is required for some games to run,
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because they monitor state of this audio chip.
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7. "ReadAhead buffer"
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This option is for dealing with slow SD card access in GP2X, which makes FMV
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games unplayable. It will allow emulator not to access SD card for longer periods
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of time, but it will take more time to fill the buffer.
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8. "Save RAM cart"
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Here you can enable 64K RAM cart. Format it in BIOS if you do.
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9. "Scale/Rot. fx"
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The Sega/Mega CD had scaling/rotation chip, which allows effects similar to
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"Mode 7" effects in SNES. Unfortunately emulating it is slow, and very few games
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used it, so it's better to disable this option, unless game really needs it.
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10. "Better sync"
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This option is similar to "Perfect synchro" in Gens. Some games require it to run,
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for example most (all?) Wolfteam games, and some other ones. Don't use it for
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games which don't need it, it will just slow them down.
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Key configuration
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-----------------
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Select "Configure controls" from the main menu. Then select "Player 1" and you will
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see two columns. The left column lists names of Genesis/MD controller buttons, and
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the right GP2X ones, which are assigned to them. If you bind 2 different GP2X buttons
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to the same action, you will get a combo (which means that you will have to press
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both buttons for that action to happen.
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