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LR35902: Mostly fix DAA

This commit is contained in:
Jeffrey Pfau 2016-01-21 00:59:59 -08:00
parent 6ab3bdcc46
commit a8b473870d
1 changed files with 16 additions and 7 deletions
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23
src/lr35902/isa-lr35902.c
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@ -590,14 +590,23 @@ DEFINE_INSTRUCTION_LR35902(CPL_,
cpu->f.n = 1;) cpu->f.n = 1;)
DEFINE_INSTRUCTION_LR35902(DAA, DEFINE_INSTRUCTION_LR35902(DAA,
if ((cpu->a & 0xF) > 0x9 || cpu->f.h) { if (cpu->f.n) {
cpu->a += 0x6; if (cpu->f.h) {
} cpu->a += 0xFA;
if ((cpu->a & 0xF0) > 0x90 || cpu->f.c) { }
cpu->a += 0x60; if (cpu->f.c) {
cpu->f.c = 1; cpu->a += 0xA0;
}
} else { } else {
cpu->f.c = 0; if ((cpu->a & 0xF) > 0x9 || cpu->f.h) {
cpu->a += 0x6;
}
if ((cpu->a & 0xF0) > 0x90 || cpu->f.c) {
cpu->a += 0x60;
cpu->f.c = 1;
} else {
cpu->f.c = 0;
}
} }
cpu->f.h = 0; cpu->f.h = 0;
cpu->f.z = !cpu->a;) cpu->f.z = !cpu->a;)