code is roughly based on Stephane Dallongeville's Gens.\r
#endif\r
\r
+PicoDrive is the first emulator ever to properly emulate Virtua Racing and\r
+it's SVP chip.\r
+\r
\r
How to make it run\r
------------------\r
\r
#ifdef GP2X\r
-Copy PicoDrive.gpe, pico940.bin and mmuhack.o to any place in your filesystem\r
+Copy PicoDrive.gpe, pico940_v2.bin and mmuhack.o to any place in your filesystem\r
(all 3 files must be in the same directory) and run PicoDrive.gpe.\r
Then load a ROM and enjoy! ROMs can be in .smd or .bin format and can be zipped.\r
\r
* Some Sega/Mega CD games don't use Z80 for anything, but they leave it active,\r
so disabling Z80 manually (in advanced options) improves performance.\r
#ifdef GP2X\r
-* Sega/Mega CD: if FMV game performance is poor, try adjusting\r
- "ReadAhead buffer" to something like 2048K.\r
* When you use both GP2X CPUs, keep in mind that you can't overclock as high as\r
when using ARM920 only. For example my GP2X when run singlecore can reach\r
280MHz, but with both cores it's about 250MHz. When overclocked too much,\r
synchronizing rendering with it. Should make scrolling smoother and eliminate tearing.\r
\r
#endif\r
+@@1. "Disable sprite limit"\r
+The MegaDrive/Genesis had a limit on how many sprites (usually smaller moving\r
+objects) can be displayed on single line. This option allows to disable that\r
+limit. Note that some games used this to hide unwanted things, so it is not\r
+always good to enable this option.\r
+\r
@@1. "Emulate Z80"\r
Enables emulation of Z80 chip, which was mostly used to drive the other sound chips.\r
Some games do complex sync with it, so you must enable it even if you don't use\r
because they monitor state of this audio chip.\r
\r
@@2. "ReadAhead buffer"\r
-#ifdef GP2X\r
-This option is for dealing with slow SD card access in GP2X, which makes FMV\r
-games unplayable. It will allow emulator not to access SD card for longer periods\r
-of time, but it will take more time to fill the buffer.\r
-#endif\r
-#ifdef GIZ\r
-This option can prefetch more data from the CD then read by the game - not really\r
-useful for Gizmondo (this is a workaround for SD access problems on GP2X port).\r
+This option can prefetch more data from the CD image then requested by game\r
+(to avoid accessing card later), what can improve performance in some cases.\r
+#ifndef PSP\r
+"OFF" is the recommended setting.\r
#endif\r
\r
@@2. "Save RAM cart"\r
If this is enabled, PSP hardware will apply bilinear filtering on the resulting image,\r
making it smoother, but blurry.\r
\r
+@@3. "Gamma adjustment"\r
+Color gamma can be adjusted with this.\r
+\r
+@@3. "Black level"\r
+This can be used to reduce unwanted "ghosting" effect for dark games, by making\r
+black pixels brighter. Use in conjunction with "gamma adjustment" for more effect.\r
+\r
@@3. "Wait for vsync"\r
Wait for the screen to finish updating before switching to next frame, to avoid tearing.\r
There are 3 options:\r
VDP: yes, except some quirks not used by games\r
YM2612 FM: yes, optimized MAME core\r
SN76489 PSG: yes, MAME core\r
+SVP chip: yes! This is first emu to ever do this.\r
+Some in-cart mappers are supported too.\r
\r
Sega/Mega CD:\r
#ifdef PSP\r
Problems / limitations\r
----------------------\r
\r
-* 32x and SVP are not emulated.\r
+* 32x is not emulated.\r
+#ifdef PSP\r
+* SVP emulation is terribly slow.\r
+#endif\r
* Various VDP quirks (window bug, scroll size 2, etc.) are not emulated,\r
as very few games use this (if any at all).\r
-* Some games don't work or have glitches because of inaccurate timing and sync\r
- between the emulated chips.\r
+* The emulator is not 100% accurate, so some things may not work as expected.\r
\r
\r
Credits\r
* Charles MacDonald (http://cgfm2.emuviews.com/) for old but still very useful\r
info about genesis hardware.\r
* Steve Snake for all that he has done for Genesis emulation scene.\r
+* Tasco Deluxe for his reverse engineering work on SVP and some mappers.\r
* Bart Trzynadlowski for his SSFII and 68000 docs.\r
* Haze for his research (http://haze.mameworld.info).\r
* Mark and Jean-loup for zlib library.\r
* A_SN for his gamma code.\r
* craigix for supplying the GP2X hardware and making this port possible.\r
* Alex for the icon.\r
+* Exophase, Rokas and Lordus for various ideas.\r
* All the people from gp32x boards for their support.\r
#endif\r
#ifdef GIZ\r
\r
Changelog\r
---------\r
+1.40c\r
+ * Fixed a problem with sound in Marble Madness.\r
+ * GP2X: Fixed minor problem with key config.\r
+\r
+1.40b\r
+ * Fixed sprite masking code. Thanks to Lordus for explaining how it works.\r
+ + Added "disable sprite limit" option.\r
+ + PSP: added black level adjustment to display options.\r
+ * Changed reset to act as 'soft' reset.\r
+ + Added detection for Puggsy (it doesn't really have sram).\r
+ * Some small timing adjustments.\r
+\r
+1.40a\r
+ * GP2X: Fixed a binding problem with up and down keys.\r
+ * Default game config no longer overrides global user config.\r
+\r
+1.40\r
+ + Added support for SVP (Sega Virtua Processor) to emulate Virtua Racing,\r
+ wrote ARM recompiler and some HLE code for VR. Credits to Exophase and\r
+ Rokas for various ideas.\r
+ * Changed config file format, files are now human-readable. Game specific\r
+ configs are now held in single file (but old game config files are still\r
+ read when new one is missing).\r
+ * Fixed a bug where some key combos didn't work as expected.\r
+ * Fixed a regression in renderer (ARM ports only, some graphic glitches in\r
+ rare cases).\r
+ * Adjusted fast renderer to work with more games, including VR.\r
+ * Fixed a problem where SegaCD RAM cart data was getting lost on reset.\r
+ * GP2X: Greatly reduced SegaCD FMV game slowdowns by disabling read-ahead\r
+ in the Linux kernel and C library (thanks to Rokas and Exophase for ideas\r
+ again). Be sure to keep "ReadAhead buffer" OFF to avoid slowdowns.\r
+ + PicoDrive now comes with a game config file for some games which need\r
+ special settings, so they should now work out-of-the-box. More games will\r
+ be added with later updates.\r
+ + GP2X: Files now can be deleted by pressing A+SELECT in the file browser.\r
+\r
1.35b\r
* PSP: mp3 code should no longer fail on 1.5 firmware.\r
+ PSP: added gamma adjustment option.\r
notaz.gp2x.de / libpicofe.git / blobdiff