PhilExile Posted February 1, 2011 Posted February 1, 2011 Hey BP, Regarding DOUBLE DRAGON, this has happened for a while. I remember I asked IQ about it and he pointed this post out from MAWS: 8th January 2006: Bryan McPhail - Double Dragon has a crash which sometimes occurs at the very end of the game (right before the final animation sequence). It occurs because of a jump look up table: BAD3: LDY #$BADD; BAD7: JSR [A,Y]. At the point of the crash A is 0x3e which causes a jump to 0x3401 (background tile ram) which obviously doesn't contain proper code and causes a crash. The jump table has 32 entries, and only the last contains an invalid jump vector. A is set to 0x3e as a result of code at 0x625f - it reads from the shared spriteram (0x2049 in main cpu memory space), copies the value to 0x523 (main ram) where it is later fetched and shifted to make 0x3e. So.. it's not clear where the error is - the 0x1f value is actually written to shared RAM by the main CPU - perhaps the MCU should modify it before the main CPU reads it back? Perhaps 0x1f should never be written at all? If you want to trace this further please submit a proper fix! In the meantime I have patched the error by making sure the invalid jump is never taken - this fixes the crash (see ddragon_spriteram_r). in the old slow down versions did this happen? as I adjust the driver a little....or is there some driver updates required?
ace9094 Posted February 1, 2011 Posted February 1, 2011 Result... great find phil.... or great memory ! I managed to play to the end before on an old emulator (I think the rom said bootleg but dunno for sure) anyway, keep up the great work both ! Hey BP, Regarding DOUBLE DRAGON, this has happened for a while. I remember I asked IQ about it and he pointed this post out from MAWS: 8th January 2006: Bryan McPhail - Double Dragon has a crash which sometimes occurs at the very end of the game (right before the final animation sequence). It occurs because of a jump look up table: BAD3: LDY #$BADD; BAD7: JSR [A,Y]. At the point of the crash A is 0x3e which causes a jump to 0x3401 (background tile ram) which obviously doesn't contain proper code and causes a crash. The jump table has 32 entries, and only the last contains an invalid jump vector. A is set to 0x3e as a result of code at 0x625f - it reads from the shared spriteram (0x2049 in main cpu memory space), copies the value to 0x523 (main ram) where it is later fetched and shifted to make 0x3e. So.. it's not clear where the error is - the 0x1f value is actually written to shared RAM by the main CPU - perhaps the MCU should modify it before the main CPU reads it back? Perhaps 0x1f should never be written at all? If you want to trace this further please submit a proper fix! In the meantime I have patched the error by making sure the invalid jump is never taken - this fixes the crash (see ddragon_spriteram_r). in the old slow down versions did this happen? as I adjust the driver a little....or is there some driver updates required?
BritneysPAIRS Posted February 2, 2011 Author Posted February 2, 2011 I already patched this in but there was a typo.... I need a tester to sort out Double Dragon I fixed the typo not sure if it fixed it but looks and compiles ok
PhilExile Posted February 2, 2011 Posted February 2, 2011 I'll test - I love that game and I haven't played it since last summer.
XreliC Posted February 2, 2011 Posted February 2, 2011 XreliC: Are you using a modchip or softmod? What kind/version? Xecuter Mod Chip Ver. 1 with an original Bios Did some digging it is a Matrix Mod Chip I think I may have a solution
BritneysPAIRS Posted February 2, 2011 Author Posted February 2, 2011 Added "Trivia" folder.... if CoinOPS/Triva/Romname.txt is present an option in the start menu is there called "Show Game Trivia" then it will open the txt file this can be used for what ever people want...moves....synopsis...technical info....reviews....what ever if nothing is there for that rom you wont see the option.....
fumanchu Posted February 2, 2011 Posted February 2, 2011 XreliC: Are you using a modchip or softmod? What kind/version? Xecuter Mod Chip Ver. 1 with an original Bios Did some digging it is a Matrix Mod Chip I think I may have a solutionit sounds to me like the bios you are using is one of the very early bioses.so you might need to patch the default.xbe back to retail.there is an app that lets you do this.
Annihilitor Posted February 2, 2011 Posted February 2, 2011 (edited) I was going to suggest the same thing as fumanchu. Edit: I dug through my old external and found the programs I used to patch the default.xbe with. Link: http://www.megaupload.com/?d=JVZEVQSI There are are 6 tools in total. XMPatcher v1.2 worked the best for me, if I remember right. Edited February 2, 2011 by Annihilitor
fumanchu Posted February 2, 2011 Posted February 2, 2011 just remember though you have to patch ALL the .xbe files,not just the default.xbe file.
BritneysPAIRS Posted February 3, 2011 Author Posted February 3, 2011 ok bug bash and tidy up going on....for EPIC plus....adding 400 games to my default build some slight setting changes as well and cleanups of clutter and slight reorg of default settings
Rickyboy_3000 Posted February 3, 2011 Posted February 3, 2011 XreliC: Are you using a modchip or softmod? What kind/version? Xecuter Mod Chip Ver. 1 with an original Bios Did some digging it is a Matrix Mod Chip I think I may have a solution Hi, Have you tried clearing the Xbox caches? I used to get a black screen when launching backups until doing the following: - Delete everything in E:\cache and also anything on the X: Y: & Z: drives.Use the file manager on XBMC.
PhilExile Posted February 3, 2011 Posted February 3, 2011 Hey BP, Have you had a look at that list of (broken) arcades I sent you? Phil ok bug bash and tidy up going on....for EPIC plus....adding 400 games to my default build some slight setting changes as well and cleanups of clutter and slight reorg of default settings
XreliC Posted February 4, 2011 Posted February 4, 2011 I was going to suggest the same thing as fumanchu. Edit: I dug through my old external and found the programs I used to patch the default.xbe with. Link: http://www.megaupload.com/?d=JVZEVQSI There are are 6 tools in total. XMPatcher v1.2 worked the best for me, if I remember right. Thanks Annihilitor and all others I will work on it from this angle
iq_132 Posted February 4, 2011 Posted February 4, 2011 A friend of mine asked me to fix some games ages, ago. Here are the ones I've gotten to: The first is that I hooked up the Sample player to the game Journey, Implemented a "pause" function, etc. This makes it so that the song plays at the end after you beat the crazy-weird minigames.http://neosource.1emu.net/temporary_upload...sample_play.rar The second is that I added the game Recalhorn to the taito_f3 driver. I have a feeling it will be very slow. I may have to implement a speed hack.http://neosource.1emu.net/temporary_upload...nops_update.rar
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