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svn-id: r47684
This commit is contained in:
Lars Skovlund 2010-01-29 22:29:03 +00:00
parent 0e8b8f1962
commit 027b44673a
1 changed files with 13 additions and 0 deletions
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13
engines/sci/engine/vm.cpp
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@ -896,6 +896,17 @@ void run_vm(EngineState *s, int restoring) {
case op_uge_: // 0x14 (20)
s->r_prev = s->r_acc;
r_temp = POP32();
// SCI0/SCI1 scripts use this to check whether a
// parameter is a pointer or a far text
// reference. It is used e.g. by the standard library
// Print function to distinguish two ways of calling it:
//
// (Print "foo") // Pointer to a string
// (Print 420 5) // Reference to the fifth message in text resource 420
// It works because in those games, the maximum resource number is 999,
// so any parameter value above that threshold must be a pointer.
if (s->r_acc == make_reg(0, 0x3e8))
s->r_acc = make_reg(0, r_temp.segment);
else if (r_temp.segment && s->r_acc.segment)
@ -907,6 +918,8 @@ void run_vm(EngineState *s, int restoring) {
case op_ult_: // 0x15 (21)
s->r_prev = s->r_acc;
r_temp = POP32();
// See above
if (s->r_acc == make_reg(0, 0x3e8))
s->r_acc = make_reg(0, !r_temp.segment);
else if (r_temp.segment && s->r_acc.segment)