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Update comments in autoDetectSci21KernelType() explaining what we're checking for.

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svn-id: r47973
This commit is contained in:
Matthew Hoops 2010-02-07 17:18:14 +00:00
parent 7ebbe374e6
commit 7731ded5af
1 changed files with 4 additions and 2 deletions
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6
engines/sci/engine/features.cpp
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@ -394,8 +394,10 @@ bool GameFeatures::autoDetectSci21KernelType() {
if (opcode == op_callk) {
uint16 kFuncNum = opparams[0];
// TODO: Explain this check; what are those kernel funcs supposed
// to be, why does this check work like it does?
// Here we check for the kDoSound opcode that's used in SCI2.1.
// Finding 0x40 as kDoSound in the Sound::play() function means the game is using
// the modified SCI2 kernel table found in some older SCI2.1 games (GK2 demo, KQ7 v1.4).
// Finding 0x75 as kDoSound means the game is using the regular SCI2.1 kernel table.
if (kFuncNum == 0x40) {
_sci21KernelType = SCI_VERSION_2;
return true;