11 March 2016 - Forum Rules
Started by Romsstar, February 14, 2011, 06:56:44 PM
001ba32c: 8f827882 lw r2,0x7882(r28)001ba330: 40819582 mtc0 r1,gtecr01_r13r21001ba334: 92828182 lbu r2,-0x7e7e(r20)001ba338: 40818582 mtc0 r1,cop0cr16_erreg001ba33c: 8e828182 lw r2,-0x7e7e(r20)001ba340: 6e824081 illegal001ba344: 92828782 lbu r2,-0x787e(r20)001ba348: 8d828582 lw r2,-0x7a7e(r12)001ba34c: 8e828f82 lw r2,-0x707e(r20)001ba350: 82824081 lb r2,0x4081(r20)001ba354: 8e828182 lw r2,-0x7e7e(r20)001ba358: 89828482 lwl r2,-0x7b7e(r12)001ba35c: 49819482 illegal001ba360: 7382000d illegal001ba364: 89828882 lwl r2,-0x777e(r12)001ba368: 40819382 mtc0 r1,gtecr01_r13r21001ba36c: 93828982 lbu r2,-0x767e(r28)001ba370: 99824081 lwr r2,0x4081(r12)001ba374: 95828f82 lhu r2,-0x707e(r12)001ba378: 40819282 mtc0 r1,gtecr01_r13r21001ba37c: 89828882 lwl r2,-0x777e(r12)001ba380: 85828482 lh r2,-0x7b7e(r12)001ba384: 95828f82 lhu r2,-0x707e(r12)001ba388: 49819482 illegal001ba38c: 0000000d break 0x00000000001ba390: 001a051b divu r0,r26001ba394: 88827682 lwl r2,0x7682(r4)001ba398: 94828182 lhu r2,-0x7e7e(r4)001ba39c: 81824081 lb r2,0x4081(r12)001ba3a0: 85829282 lh r2,-0x6d7e(r12)001ba3a4: 99824081 lwr r2,0x4081(r12)001ba3a8: 95828f82 lhu r2,-0x707e(r12)001ba3ac: 94824081 lhu r2,0x4081(r4)001ba3b0: 8c828182 lw r2,-0x7e7e(r4)001ba3b4: 89828b82 lwl r2,-0x747e(r12)001ba3b8: 87828e82 lh r2,-0x717e(r28)001ba3bc: 81824081 lb r2,0x4081(r12)001ba3c0: 8f828282 lw r2,-0x7d7e(r28)001ba3c4: 94829582 lhu r2,-0x6a7e(r4)001ba3c8: 000d4881 illegal001ba3cc: 00560000 sll r0,r22,0x00001ba3d0: 006707fd illegal001ba3d4: fd1b000f illegal001ba3d8: 7882001a illegal001ba3dc: 95828f82 lhu r2,-0x707e(r12)001ba3e0: 97824081 lhu r2,0x4081(r28)001ba3e4: 92828582 lbu r2,-0x7a7e(r20)001ba3e8: 40818582 mtc0 r1,cop0cr16_erreg001ba3ec: 95828c82 lhu r2,-0x737e(r12)001ba3f0: 8b828382 lwl r2,-0x7c7e(r28)001ba3f4: 40819982 mtc0 r1,gtecr02_r22r23001ba3f8: 81828c82 lb r2,-0x737e(r12)001ba3fc: 94829382 lhu r2,-0x6c7e(r4)001ba400: 94824081 lhu r2,0x4081(r4)001ba404: 8d828982 lw r2,-0x767e(r12)001ba408: 49818582 illegal001ba40c: 6682000d illegal001ba410: 96828982 lhu r2,-0x767e(r20)001ba414: 40818582 mtc0 r1,cop0cr16_erreg001ba418: 90829582 lbu r2,-0x6a7e(r4)001ba41c: 000d4981 illegal001ba420: 00560000 sll r0,r22,0x00001ba424: 001600fd illegal001ba428: 051b0552 illegal001ba42c: 7682001a illegal001ba430: 97828f82 lhu r2,-0x707e(r28)001ba434: 000d4981 illegal001ba438: 054e0000 illegal001ba43c: fbdefe9c illegal001ba440: 00670001 illegal001ba444: fd4e0028 illegal001ba448: faa1fea3 illegal001ba44c: fc4e0001 illegal001ba450: f91ffe9d illegal001ba454: fd4a0001 illegal001ba458: 004cfc4a illegal001ba45c: 004c05fd illegal001ba460: 054e05fc illegal
0015b1a0: 001afd1b divu r0,r260015b1a4: 95826382 lhu r2,0x6382(r12)0015b1a8: 82824081 lb r2,0x4081(r20)0015b1ac: 93828982 lbu r2,-0x767e(r28)0015b1b0: 40819482 mtc0 r1,gtecr01_r13r210015b1b4: 89828582 lwl r2,-0x7a7e(r12)0015b1b8: 40818e82 mtc0 r1,gtecr00_r11r120015b1bc: 87826e82 lh r2,0x6e82(r28)0015b1c0: 85829282 lh r2,-0x6d7e(r12)0015b1c4: 8f828d82 lw r2,-0x727e(r28)0015b1c8: 7c818e82 illegal0015b1cc: 81826182 lb r2,0x6182(r12)0015b1d0: 84828e82 lh r2,-0x717e(r4)0015b1d4: 94828982 lhu r2,-0x767e(r4)0015b1d8: 000d4981 illegal0015b1dc: 81826382 lb r2,0x6382(r12)0015b1e0: 40819382 mtc0 r1,gtecr01_r13r210015b1e4: 93828982 lbu r2,-0x767e(r28)0015b1e8: 40819482 mtc0 r1,gtecr01_r13r210015b1ec: 95828582 lhu r2,-0x7a7e(r12)0015b1f0: 92828582 lbu r2,-0x7a7e(r20)0015b1f4: 75824081 illegal0015b1f8: 92828582 lbu r2,-0x7a7e(r20)0015b1fc: 94829382 lhu r2,-0x6c7e(r4)0015b200: 83828582 lb r2,-0x7a7e(r28)0015b204: 49818b82 illegal0015b208: 0000000d break 0x000000000015b20c: 001a051b divu r0,r260015b210: 81827682 lb r2,0x7682(r12)0015b214: 40819382 mtc0 r1,gtecr01_r13r210015b218: 85829282 lh r2,-0x6d7e(r12)0015b21c: 85828482 lh r2,-0x7b7e(r12)0015b220: 94829382 lhu r2,-0x6c7e(r4)0015b224: 84824081 lh r2,0x4081(r4)0015b228: 40819582 mtc0 r1,gtecr01_r13r210015b22c: 81828482 lb r2,-0x7b7e(r12)0015b230: 000d4881 illegal0015b234: 00560000 sll r0,r22,0x000015b238: 006707fd illegal0015b23c: fd1b000f illegal0015b240: 6b82001a illegal0015b244: 94828582 lhu r2,-0x7a7e(r4)0015b248: 94829a82 lhu r2,-0x657e(r4)0015b24c: 93828582 lbu r2,-0x7a7e(r28)0015b250: 6c824081 illegal0015b254: 8c828182 lw r2,-0x7e7e(r4)0015b258: 88824081 lwl r2,0x4081(r4)0015b25c: 94828182 lhu r2,-0x7e7e(r4)0015b260: 85829482 lh r2,-0x6b7e(r12)0015b264: 94829382 lhu r2,-0x6c7e(r4)0015b268: 84824081 lh r2,0x4081(r4)0015b26c: 000d9582 srl r18,r13,0x160015b270: 8c826682 lw r2,0x6682(r4)0015b274: 83825883 lb r2,0x5883(r28)0015b278: 44818b82 illegal0015b27c: 64824081 illegal0015b280: 87829282 lh r2,-0x6d7e(r28)0015b284: 82828982 lb r2,-0x767e(r20)0015b288: 84824081 lh r2,0x4081(r4)0015b28c: 83828982 lb r2,-0x767e(r28)0015b290: 49818882 illegal0015b294: 0000000d break 0x000000000015b298: 00fd0056 illegal0015b29c: 051c0016 illegal0015b2a0: 001a051b divu r0,r260015b2a4: 86827482 lh r2,0x7482(r20)0015b2a8: 49818682 illegal0015b2ac: 0000000d break 0x000000000015b2b0: fe9c054e illegal0015b2b4: 0001fbde illegal0015b2b8: 00280067 nor r0,r1,r80015b2bc: fea3fd4e illegal0015b2c0: 0001faa1 addu r31,r0,r10015b2c4: fe9dfc4e illegal0015b2c8: 0001f91f illegal0015b2cc: fc4afd4a illegal0015b2d0: 05fd004c illegal0015b2d4: 05fc004c illegal
Quote from: Romsstar on February 14, 2011, 06:56:44 PMNow even for my eyes the programmers seemed to have screwed up at the Pal as we have the famous "Pal Bug".Now my knowledge to ASM is nearly 0 so if anyone can tell me anything useful that would be really appreciated.
Quote from: Ryusui on February 14, 2011, 07:50:03 PMIt's just code. It's useless without context.Does copying the NTSC version's code into the PAL version fix the bug?EDIT: Come to think of it, are you sure that is code and not data?
Quote from: Ryusui on February 14, 2011, 09:14:52 PMHave you traced through it, perhaps? See what it does?If the game never actually executes this "code", there's a good chance it's actually data. I'm seeing a lot of "illegal instructions" in there suggesting this might be the case.
Quote from: Romsstar on February 14, 2011, 09:38:34 PMQuote from: Ryusui on February 14, 2011, 09:14:52 PMHave you traced through it, perhaps? See what it does?If the game never actually executes this "code", there's a good chance it's actually data. I'm seeing a lot of "illegal instructions" in there suggesting this might be the case.Could you briefly outline how I would do that or link me to a guide? Also I've read somewhere that "tracing is something you don't do for PSX hacking" that's why this thought never occured to me.Gemini wrote something similar to that.
Quote from: esperknight on February 14, 2011, 10:13:44 PMFor PSX tracing you can use any of the ones listed that have tracing here : PSX UtilsI believe I've used Klarths version for when I last did any tracing. Possibly the reason why it's a bad idea is those files get huge really fast. I still find it useful though once in a while when I'm in the mood for PSX hacking as I find it easier to sift through a file than on screen sometimes.For some reason though on Windows 7 I cannot get any of the keyboard/joystick plugins to work. No idea why... so if you're on Windows 7 good luck.
Quote from: esperknight on February 16, 2011, 03:03:47 AM1.5 MB is nothing I tend to sift through 100 mb files if need be and I remember for the PSX some of them got into the 1.5 to 2gb range. You're not suppose to understand the whole thing but be able to pinpoint the code you need and isolate it from the rest and understand that enough to figure out what your after.I'm curious as I'm not finding much on it but what is the Digimon World 1 PAL bug?And if your talking about why you see a line in memory and why it's not on the ISO, most likely it's compressed or it could be stored differently on the CD (the bytes are reversed on the CD but read in the write way into memory or something. I recall seeing a game store SJIS backwards on the CD but when reading it into memory it was stored correctly).
Quote from: Ryusui on February 16, 2011, 07:20:42 AMIf copying DG0.SCN over DG2.SCN fixes the problem, then the issue isn't in the game's code at all. You should be looking at these files and comparing them to one another.
Quote from: Ryusui on February 16, 2011, 05:23:02 PMWell, yeah, they won't be the same size. I think you'll find the Japanese version of the SCN file will take up much less space, in fact.Do the files actually contain script pointers? I suspect you'll find that they do, if you look closely. They'll probably be relative to the start of the file, or the address it gets loaded to in memory.What I'm saying here is this: your first priority should be to work out the pointer block, then use a tool like Cartographer (preferably Cartographer) to extract the script from both. As long as the pointers are in the same order, you'll end up with two script files you can compare pointer-by-pointer. If there's non-text data (i.e. event code) in there, it'll dump that to the files, too. This is a good thing.Also, I'd like a bit more clarification. You say you figured out a (kludgy) way to fix the PAL bug; does copying DG0.SCN over DG2.SCN fix it, or was it something else?
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