public void RRCA_GeneratesCarry()
{
// --- Arrange
var m = new Z80TestMachine(RunMode.UntilEnd);
m.InitCode(new byte[]
{
0x3E, 0x41, // LD A,01H
0x0F // RRCA
});
// --- Act
m.Run();
// --- Assert
var regs = m.Cpu.Registers;
m.ShouldKeepRegisters(except: "A, F");
m.ShouldKeepMemory();
m.ShouldKeepSFlag();
m.ShouldKeepZFlag();
m.ShouldKeepPVFlag();
regs.HFlag.ShouldBeFalse();
regs.NFlag.ShouldBeFalse();
regs.CFlag.ShouldBeTrue();
regs.A.ShouldBe((byte)0xA0);
regs.PC.ShouldBe((ushort)0x0003);
m.Cpu.Tacts.ShouldBe(11L);
}
public void ADD_HL_BC_GeneratesHalfOverflow()
{
// --- Arrange
var m = new Z80TestMachine(RunMode.UntilEnd);
m.InitCode(new byte[]
{
0x21, 0x34, 0x1F, // LD HL,1F34H
0x01, 0x02, 0x11, // LD BC,1102H
0x09 // ADD HL,BC
});
// --- Act
m.Run();
// --- Assert
var regs = m.Cpu.Registers;
m.ShouldKeepRegisters(except: "F, BC, HL");
m.ShouldKeepMemory();
m.ShouldKeepSFlag();
m.ShouldKeepZFlag();
m.ShouldKeepPVFlag();
regs.NFlag.ShouldBeFalse();
regs.CFlag.ShouldBeFalse();
regs.HFlag.ShouldBeTrue();
regs.HL.ShouldBe((ushort)0x3036);
regs.PC.ShouldBe((ushort)0x0007);
m.Cpu.Tacts.ShouldBe(31L);
}
public void RRA_UsesCarry()
{
// --- Arrange
var m = new Z80TestMachine(RunMode.UntilEnd);
m.InitCode(new byte[]
{
0x3E, 0x20, // LD A,20H
0x37, // SCF
0x1F // RRA
});
// --- Act
m.Run();
// --- Assert
var regs = m.Cpu.Registers;
m.ShouldKeepRegisters(except: "A, F");
m.ShouldKeepMemory();
m.ShouldKeepSFlag();
m.ShouldKeepZFlag();
m.ShouldKeepPVFlag();
regs.HFlag.ShouldBeFalse();
regs.NFlag.ShouldBeFalse();
regs.CFlag.ShouldBeFalse();
regs.A.ShouldBe((byte)0x90);
regs.PC.ShouldBe((ushort)0x0004);
m.Cpu.Tacts.ShouldBe(15L);
}
public void RLCA_WorksAsExpected()
{
// --- Arrange
var m = new Z80TestMachine(RunMode.UntilEnd);
m.InitCode(new byte[]
{
0x3E, 0x71, // LD A,71H
0x07 // RLCA
});
// --- Act
m.Run();
// --- Assert
var regs = m.Cpu.Registers;
m.ShouldKeepRegisters(except: "A, F");
m.ShouldKeepMemory();
m.ShouldKeepSFlag();
m.ShouldKeepZFlag();
m.ShouldKeepPVFlag();
regs.HFlag.ShouldBeFalse();
regs.NFlag.ShouldBeFalse();
regs.CFlag.ShouldBeFalse();
regs.A.ShouldBe((byte)0xE2);
regs.PC.ShouldBe((ushort)0x0003);
m.Cpu.Tacts.ShouldBe(11L);
}
public void ADD_HL_BC_WorksAsExpected()
{
// --- Arrange
var m = new Z80TestMachine(RunMode.UntilEnd);
m.InitCode(new byte[]
{
0x21, 0x34, 0x12, // LD HL,1234H
0x11, 0x02, 0x11, // LD DE,1102H
0x19 // ADD HL,DE
});
// --- Act
m.Run();
// --- Assert
var regs = m.Cpu.Registers;
m.ShouldKeepRegisters(except: "F, DE, HL");
m.ShouldKeepMemory();
m.ShouldKeepSFlag();
m.ShouldKeepZFlag();
m.ShouldKeepPVFlag();
regs.NFlag.ShouldBeFalse();
regs.CFlag.ShouldBeFalse();
regs.HFlag.ShouldBeFalse();
regs.HL.ShouldBe((ushort)0x2336);
regs.PC.ShouldBe((ushort)0x0007);
m.Cpu.Tacts.ShouldBe(31L);
}