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Try to fix DAA

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This commit is contained in:
Kevin Hamacher 2016-05-29 14:43:13 +02:00
parent 691147631a
commit 4a1b335887
1 changed files with 8 additions and 4 deletions
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12
src/cpu.rs
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@ -946,9 +946,13 @@ impl CPU {
// Logic copied from some other emulator // Logic copied from some other emulator
let mut v = self.regs[REG_A] as u16; let mut v = self.regs[REG_A] as u16;
if self.flags & FLAG_N > 0{ if self.debug {
println!("DAA");
}
if self.flags & FLAG_N == 0 {
// Lower nibble // Lower nibble
if self.flags & FLAG_H > 0 || v & 0xF > 9 { if self.flags & FLAG_H > 0 || (v & 0xF) > 9 {
v += 0x06; v += 0x06;
} }
@ -969,8 +973,8 @@ impl CPU {
} }
self.clear_flag(FLAG_H); self.clear_flag(FLAG_H);
self.set_clear_flag(FLAG_C, v == 0x100); self.set_clear_flag(FLAG_C, (v & 0x100) == 0x100);
self.set_clear_flag(FLAG_Z, v & 0xFF == 0); self.set_clear_flag(FLAG_Z, v as u8 == 0);
self.regs[REG_A] = v as u8; self.regs[REG_A] = v as u8;
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