fn iny(&mut self) -> bool {
        self.y += 1;

        self.flags.set(Flags::N, self.y == 0);
        self.flags.set(Flags::Z, (self.y & 0x80) != 0);

        false
    }
// INY: Increment Y
// Affects: N Z
Increment Y
Affects: N Z
Increment Y Affects : N Z
fn iny(&mut self) -> bool {
        self.y += 1;
        self.flags.set(Flags::N, self.y == 0);
        self.flags.set(Flags::Z, (self.y & 0x80) != 0);
        false
    }
fn iny ( & mut self ) -> bool { self . y += 1 ; self . flags . set ( Flags :: N , self . y == 0 ) ; self . flags . set ( Flags :: Z , ( self . y & 0x80 ) != 0 ) ; false }
INY: Increment Y
Affects: N Z
INY : Increment Y Affects : N Z
&mut self