public void InterruptDeviceResetWorksAsExpected()
{
// --- Arrange
var vm = new SpectrumAdvancedTestMachine();
var idev = new InterruptDevice(TEST_INT_TACT);
idev.OnAttachedToVm(vm);
// --- Act
idev.Reset();
// --- Assert
idev.InterruptRaised.ShouldBeFalse();
idev.InterruptRevoked.ShouldBeFalse();
}
public void InterruptIsRaisedWithinAllowedRange()
{
for (var tact = TEST_INT_TACT; tact <= TEST_INT_TACT + InterruptDevice.LONGEST_OP_TACTS; tact++)
{
// --- Arrange
var vm = new SpectrumAdvancedTestMachine();
var idev = new InterruptDevice(TEST_INT_TACT);
idev.OnAttachedToVm(vm);
// --- Act/Assert
idev.CheckForInterrupt(tact);
idev.InterruptRaised.ShouldBeTrue();
idev.InterruptRevoked.ShouldBeFalse();
idev.FrameCount.ShouldBe(1);
(vm.Cpu.StateFlags & Z80StateFlags.Int).ShouldBe(Z80StateFlags.Int);
}
}
public void InterruptNotRaisedTooEarly()
{
// --- Arrange
var vm = new SpectrumAdvancedTestMachine();
var idev = new InterruptDevice(TEST_INT_TACT);
idev.OnAttachedToVm(vm);
// --- Act/Assert
for (var tact = 0; tact < TEST_INT_TACT; tact++)
{
idev.CheckForInterrupt(tact);
idev.InterruptRaised.ShouldBeFalse();
idev.InterruptRevoked.ShouldBeFalse();
idev.FrameCount.ShouldBe(0);
(vm.Cpu.StateFlags & Z80StateFlags.Int).ShouldBe(Z80StateFlags.None);
}
}
public void InterruptIsNotRereaised()
{
// --- Arrange
var vm = new SpectrumAdvancedTestMachine();
var idev = new InterruptDevice(TEST_INT_TACT);
idev.OnAttachedToVm(vm);
idev.CheckForInterrupt(TEST_INT_TACT);
// --- Act
vm.Cpu.StateFlags &= Z80StateFlags.InvInt;
idev.CheckForInterrupt(TEST_INT_TACT + 1);
// --- Assert
idev.InterruptRaised.ShouldBeTrue();
idev.InterruptRevoked.ShouldBeFalse();
(vm.Cpu.StateFlags & Z80StateFlags.Int).ShouldBe(Z80StateFlags.None);
idev.FrameCount.ShouldBe(1);
}
public void InterruptIsNotRaisedTooLate()
{
// --- Arrange
var vm = new SpectrumAdvancedTestMachine();
var idev = new InterruptDevice(TEST_INT_TACT);
idev.OnAttachedToVm(vm);
// --- Act/Assert
var lateTact = TEST_INT_TACT + InterruptDevice.LONGEST_OP_TACTS + 1;
for (var tact = lateTact; tact < lateTact + 10; tact++)
{
idev.CheckForInterrupt(tact);
idev.InterruptRaised.ShouldBeFalse();
idev.InterruptRevoked.ShouldBeTrue();
idev.FrameCount.ShouldBe(0);
(vm.Cpu.StateFlags & Z80StateFlags.Int).ShouldBe(Z80StateFlags.None);
}
}