diff options
Diffstat (limited to 'engines/sci/engine/script_patches.cpp')
| -rw-r--r-- | engines/sci/engine/script_patches.cpp | 109 |
1 files changed, 91 insertions, 18 deletions
diff --git a/engines/sci/engine/script_patches.cpp b/engines/sci/engine/script_patches.cpp index 4011273ca3..6915e12a0e 100644 --- a/engines/sci/engine/script_patches.cpp +++ b/engines/sci/engine/script_patches.cpp @@ -2123,21 +2123,30 @@ static const uint16 qfg1vgaPatchMoveToCrusher[] = { // Same pathfinding bug as above, where Ego is set to move to an impossible // spot when sneaking. In GuardsTrumpet::changeState, we change the final -// location where Ego is moved from 111, 111 to 114, 114. +// location where Ego is moved from 111, 111 to 116, 116. +// target coordinate is really problematic here. +// +// 114, 114 works when the speed slider is all the way up, but doesn't work +// when the speed slider is not. +// +// It seems that this bug was fixed by Sierra for the Macintosh version. +// +// Applies to at least: English PC floppy +// Responsible method: GuardsTrumpet::changeState(8) // Fixes bug: #6248 static const uint16 qfg1vgaSignatureMoveToCastleGate[] = { + 0x51, SIG_ADDTOOFFSET(+1), // class MoveTo SIG_MAGICDWORD, - 0x51, 0x1f, // class MoveTo 0x36, // push - 0x39, 0x6f, // pushi 6f (111 - x) - 0x3c, // dup (111 - y) + 0x39, 0x6f, // pushi 6f (111d) + 0x3c, // dup (111d) - coordinates 111, 111 0x7c, // pushSelf SIG_END }; static const uint16 qfg1vgaPatchMoveToCastleGate[] = { PATCH_ADDTOOFFSET(+3), - 0x39, 0x72, // pushi 72 (114 - x) + 0x39, 0x74, // pushi 74 (116d), changes coordinates to 116, 116 PATCH_END }; @@ -2335,29 +2344,37 @@ static const SciScriptPatcherEntry qfg1vgaSignatures[] = { // which finally re-enables controls // // A fix is difficult to implement. The code in script 20 is generic and used by multiple objects -// That's why I have decided to change the responsible globals (66h and A1h) during mountSaurus::changeState(5) // -// This fix could cause issues in case there is a cutscene, that contains ego getting on a saurus and -// requires controls not getting re-enabled after getting back up on the saurus. +// Originally I decided to change the responsible globals (66h and A1h) during mountSaurus::changeState(5). +// This worked as far as for controls, but mountSaurus::init changes a few selectors of ego as well, which +// won't get restored in that situation, which then messes up room changes and other things. +// +// I have now decided to change sheepScript::changeState(2) in script 665 instead. +// +// This fix could cause issues in case there is a cutscene, where ego is supposed to get onto the saurus using +// sheepScript. // // Applies to at least: English PC Floppy, English Amiga Floppy // Responsible method: mountSaurus::changeState(), mountSaurus::init(), mountSaurus::dispose() // Fixes bug: #5156 static const uint16 qfg2SignatureSaurusFreeze[] = { 0x3c, // dup - 0x35, 0x05, // ldi 5 + 0x35, 0x02, // ldi 5 SIG_MAGICDWORD, 0x1a, // eq? - 0x30, SIG_UINT16(0x004e), // bnt [ret] - 0x39, SIG_SELECTOR8(contains), // pushi [selector contains] - 0x78, // push1 + 0x30, SIG_UINT16(0x0043), // bnt [ret] + 0x76, // push0 + SIG_ADDTOOFFSET(+61), // skip to dispose code + 0x39, SIG_SELECTOR8(dispose), // pushi "dispose" + 0x76, // push0 + 0x54, 0x04, // self 04 SIG_END }; static const uint16 qfg2PatchSaurusFreeze[] = { - 0x35, 0x01, // ldi 1 - 0xa1, 0x66, // sag 66h - 0xa0, SIG_UINT16(0x00a1), // sag 00A1h + 0x81, 0x66, // lag 66h + 0x2e, SIG_UINT16(0x0040), // bt [to dispose code] + 0x35, 0x00, // ldi 0 (waste 2 bytes) PATCH_END }; @@ -2441,7 +2458,7 @@ static const uint16 qfg2PatchImportCharType[] = { // script, description, signature patch static const SciScriptPatcherEntry qfg2Signatures[] = { - { true, 660, "getting back on saurus freeze fix", 1, qfg2SignatureSaurusFreeze, qfg2PatchSaurusFreeze }, + { true, 665, "getting back on saurus freeze fix", 1, qfg2SignatureSaurusFreeze, qfg2PatchSaurusFreeze }, { true, 805, "import character type fix", 1, qfg2SignatureImportCharType, qfg2PatchImportCharType }, { true, 944, "import dialog continuous calls", 1, qfg2SignatureImportDialog, qfg2PatchImportDialog }, SCI_SIGNATUREENTRY_TERMINATOR @@ -2758,9 +2775,64 @@ static const uint16 sq4CdSignatureWalkInFromBelowRoom45[] = { static const uint16 sq4CdPatchWalkInFromBelowRoom45[] = { PATCH_ADDTOOFFSET(+2), - 0x38, PATCH_UINT16(0x00bc), // pushi 00BCh + 0x38, PATCH_UINT16(0x00bc), // pushi 00BCh PATCH_ADDTOOFFSET(+15), - 0x38, PATCH_UINT16(0x00bb), // pushi 00BBh + 0x38, PATCH_UINT16(0x00bb), // pushi 00BBh + PATCH_END +}; + +// It seems that Sierra forgot to set a script flag, when cleaning out the bank account +// in Space Quest 4 CD. This was probably caused by the whole bank account interaction +// getting a rewrite and polish in the CD version. +// +// Because of this bug, points for changing back clothes will not get awarded, which +// makes it impossible to get a perfect point score in the CD version of the game. +// The points are awarded by rm371::doit in script 371. +// +// We fix this. Bug also happened, when using the original interpreter. +// Bug does not happen for PC floppy. +// +// Attention: Some Let's Plays on youtube show that points are in fact awarded. Which is true. +// But those Let's Plays were actually created by playing a hacked Space Quest 4 version +// (which is part Floppy, part CD version - we consider it to be effectively pirated) +// and not the actual CD version of Space Quest 4. +// It's easy to identify - talkie + store called "Radio Shack" -> is hacked version. +// +// Applies to at least: English PC CD +// Responsible method: but2Script::changeState(2) +// Fixes bug: #6866 +static const uint16 sq4CdSignatureGetPointsForChangingBackClothes[] = { + 0x35, 0x02, // ldi 02 + SIG_MAGICDWORD, + 0x1a, // eq? + 0x30, SIG_UINT16(0x006a), // bnt [state 3] + 0x76, + SIG_ADDTOOFFSET(+46), // jump over "withdraw funds" code + 0x33, 0x33, // jmp [end of state 2, set cycles code] + SIG_ADDTOOFFSET(+51), // jump over "clean bank account" code + 0x35, 0x02, // ldi 02 + 0x65, 0x1a, // aTop cycles + 0x33, 0x0b, // jmp [toss/ret] + 0x3c, // dup + 0x35, 0x03, // ldi 03 + 0x1a, // eq? + 0x31, 0x05, // bnt [toss/ret] + SIG_END +}; + +static const uint16 sq4CdPatchGetPointsForChangingBackClothes[] = { + PATCH_ADDTOOFFSET(+3), + 0x30, PATCH_UINT16(0x0070), // bnt [state 3] + PATCH_ADDTOOFFSET(+47), // "withdraw funds" code + 0x33, 0x39, // jmp [end of state 2, set cycles code] + PATCH_ADDTOOFFSET(+51), + 0x78, // push1 + 0x39, 0x1d, // ldi 1Dh + 0x45, 0x07, 0x02, // call export 7 of script 0 (set flag) -> effectively sets global 73h, bit 2 + 0x35, 0x02, // ldi 02 + 0x65, 0x1c, // aTop cycles + 0x33, 0x05, // jmp [toss/ret] + // check for state 3 code removed to save 6 bytes PATCH_END }; @@ -2859,6 +2931,7 @@ static const SciScriptPatcherEntry sq4Signatures[] = { { true, 298, "Floppy: endless flight", 1, sq4FloppySignatureEndlessFlight, sq4FloppyPatchEndlessFlight }, { true, 700, "Floppy: throw stuff at sequel police bug", 1, sq4FloppySignatureThrowStuffAtSequelPoliceBug, sq4FloppyPatchThrowStuffAtSequelPoliceBug }, { true, 45, "CD: walk in from below for room 45 fix", 1, sq4CdSignatureWalkInFromBelowRoom45, sq4CdPatchWalkInFromBelowRoom45 }, + { true, 396, "CD: get points for changing back clothes fix",1, sq4CdSignatureGetPointsForChangingBackClothes, sq4CdPatchGetPointsForChangingBackClothes }, { true, 0, "CD: Babble icon speech and subtitles fix", 1, sq4CdSignatureBabbleIcon, sq4CdPatchBabbleIcon }, { true, 818, "CD: Speech and subtitles option", 1, sq4CdSignatureTextOptions, sq4CdPatchTextOptions }, { true, 818, "CD: Speech and subtitles option button", 1, sq4CdSignatureTextOptionsButton, sq4CdPatchTextOptionsButton }, |