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SCI: Fix SQ1VGA script patch, fixes bug #7145

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Script patch used "lsg" for one instruction, which should have
been "lag" instead.
Caused issues with the spider droid.
Added more details about this script patch in comments.

Also specified the method for a qfg3 script patch in comments.
This commit is contained in:
Martin Kiewitz 2016-06-25 02:24:09 +02:00
parent 5eaea05a2b
commit 09d314d3d7
1 changed files with 17 additions and 6 deletions
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23
engines/sci/engine/script_patches.cpp
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@ -2761,7 +2761,7 @@ static const uint16 qfg3PatchImportDialog[] = {
// Teller::doChild. We jump to this call of hero::solvePuzzle to get that same
// behaviour.
// Applies to at least: English, German, Italian, French, Spanish Floppy
// Responsible method: unknown
// Responsible method: uhuraTell::doChild
// Fixes bug: #5172
static const uint16 qfg3SignatureWooDialog[] = {
SIG_MAGICDWORD,
@ -3514,24 +3514,35 @@ static const uint16 sq1vgaSignatureSpiderDroidTiming[] = {
0x30, SIG_UINT16(0x0005), // bnt [further method code]
0x35, 0x00, // ldi 00
0x32, SIG_UINT16(0x0052), // jmp [super-call]
0x89, 0xa6, // lsg global[a6]
0x89, 0xa6, // lsg global[a6] <-- flag gets set to 1 when ego went up the skeleton tail, when going down it's set to 2
0x35, 0x01, // ldi 01
0x1a, // eq?
0x30, SIG_UINT16(0x0012), // bnt [2nd code], in case global A6 <> 1
0x30, SIG_UINT16(0x0012), // bnt [PChase set code], in case global A6 <> 1
0x81, 0xb5, // lag global[b5]
0x30, SIG_UINT16(0x000d), // bnt [2nd code], in case global B5 == 0
0x30, SIG_UINT16(0x000d), // bnt [PChase set code], in case global B5 == 0
0x38, SIG_UINT16(0x008c), // pushi 008c
0x78, // push1
0x72, SIG_UINT16(0x1cb6), // lofsa 1CB6 (moveToPath)
0x36, // push
0x54, 0x06, // self 06
0x32, SIG_UINT16(0x0038), // jmp [super-call]
// PChase set call
0x81, 0xb5, // lag global[B5]
0x18, // not
0x30, SIG_UINT16(0x0032), // bnt [super-call], in case global B5 <> 0
// followed by:
// is spider in current room
// is global A6h == 2? -> set PChase
SIG_END
}; // 58 bytes)
// Global A6h <> 1 (did NOT went up the skeleton)
// Global B5h = 0 -> set PChase
// Global B5h <> 0 -> do not do anything
// Global A6h = 1 (did went up the skeleton)
// Global B5h = 0 -> set PChase
// Global B5h <> 0 -> set moveToPath
static const uint16 sq1vgaPatchSpiderDroidTiming[] = {
0x63, 0x4e, // pToa script
0x2f, 0x68, // bt [super-call]
@ -3556,8 +3567,8 @@ static const uint16 sq1vgaPatchSpiderDroidTiming[] = {
0x65, 0x4c, // aTop cycleSpeed
0x65, 0x5e, // aTop moveSpeed
// new code end
0x89, 0xb5, // lsg global[B5]
0x31, 0x13, // bnt [2nd code chunk]
0x81, 0xb5, // lag global[B5]
0x31, 0x13, // bnt [PChase code chunk]
0x89, 0xa6, // lsg global[A6]
0x35, 0x01, // ldi 01
0x1a, // eq?