public void Write_SetAddressAndDataFirst_ReadBackCorrectValue()
{
var mem = MemoryTestExtensions.NewRam(new byte[] { 0x00 });
var addressBus = mem.Address.CreateConnection();
var dataBus = mem.Data.CreateConnection();
var wrDataBus = new BusMaster <BusData8>(dataBus.Bus, null);
var ceProv = mem.ChipEnable.CreateConnection();
var oeProv = mem.OutputEnable.CreateConnection();
var weProv = mem.WriteEnable.CreateConnection();
// set address
addressBus.IsEnabled = true;
addressBus.Write(new BusData16(0));
// write data
wrDataBus.IsEnabled = true;
wrDataBus.Write(new BusData8(Value));
// enable chip and input
ceProv.Write(DigitalLevel.Low);
weProv.Write(DigitalLevel.Low);
// value is stored here
weProv.Write(DigitalLevel.High);
wrDataBus.IsEnabled = false;
oeProv.Write(DigitalLevel.Low);
dataBus.Value.Equals(new BusData8(Value)).Should().BeTrue();
}
public CpuZ80()
{
Clock = new DigitalSignalConsumer("CLK");
Reset = new DigitalSignalConsumer("RST");
Interrupt = new DigitalSignalConsumer("INT");
NonMaskableInterrupt = new DigitalSignalConsumer("NMI");
Wait = new DigitalSignalConsumer("WAIT");
BusRequest = new DigitalSignalConsumer("BREQ");
BusAcknowledge = new DigitalSignalProvider("BACK");
MemoryRequest = new DigitalSignalProvider("MREQ");
IoRequest = new DigitalSignalProvider("IORQ");
Read = new DigitalSignalProvider("RD");
Write = new DigitalSignalProvider("WR");
MachineCycle1 = new DigitalSignalProvider("M1");
Refresh = new DigitalSignalProvider("RFSH");
Halt = new DigitalSignalProvider("HALT");
Address = new BusMaster <BusData16>("Address");
Data = new BusMasterSlave <BusData8>("Data");
// bond wires
_die = new Die(
Clock, Reset, Interrupt, NonMaskableInterrupt,
Wait, BusRequest, BusAcknowledge,
MemoryRequest, IoRequest, Read, Write,
MachineCycle1, Refresh, Halt, Address, Data);
}
public CpuZ80()
{
Clock = new DigitalSignalConsumer("CLK");
Reset = new DigitalSignalConsumer("RST");
Interrupt = new DigitalSignalConsumer("INT");
NonMaskableInterrupt = new DigitalSignalConsumer("NMI");
Wait = new DigitalSignalConsumer("WAIT");
BusRequest = new DigitalSignalConsumer("BREQ");
BusAcknowledge = new DigitalSignalProvider("BACK");
MemoryRequest = new DigitalSignalProvider("MREQ");
IoRequest = new DigitalSignalProvider("IORQ");
Read = new DigitalSignalProvider("RD");
Write = new DigitalSignalProvider("WR");
MachineCycle1 = new DigitalSignalProvider("M1");
Refresh = new DigitalSignalProvider("RFSH");
Halt = new DigitalSignalProvider("HALT");
Address = new BusMaster <BusData16>("Address");
Data = new BusMasterSlave <BusData8>("Data");
_execEngine = new ExecutionEngine(this);
_registers = new Registers();
_alu = new Alu(_registers);
Initialize();
}
public void Connect_OneMaster_NoErrors()
{
var uut = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
uut.ConnectTo(bus);
}
private static Bus <T> Connect <T>(BusMaster <T> master, BusSlave <T> slave, string busName = null)
where T : BusData, new()
{
if (master.IsConnected && slave.IsConnected)
{
if (master.Bus != slave.Bus)
{
throw new InvalidOperationException("Both Master and Slave are already connected to different buses.");
}
return(master.Bus);
}
Bus <T> bus = null;
if (master.IsConnected)
{
bus = master.Bus;
slave.ConnectTo(bus);
}
else if (slave.IsConnected)
{
bus = slave.Bus;
master.ConnectTo(bus);
}
return(bus);
}
public static BusSlave <T> CreateConnection <T>(this BusMaster <T> master, string busName = null)
where T : BusData, new()
{
var bus = master.GetOrAddBus(busName);
return(new BusSlave <T>(bus, busName));
}
public InputPort()
{
_portEnable = new DigitalSignalConsumer("PE");
_portEnable.OnChanged += PortEnable_OnChanged;
_busMaster = new BusMaster("InputPort Output");
_buffer = new BusDataBuffer();
}
public InputPort(string name)
{
Name = name;
_portEnable = new DigitalSignalConsumer("PE");
_portEnable.OnChanged += PortEnable_OnChanged;
_busMaster = new BusMaster(name + "-Output");
_buffer = new BusDataBuffer();
}
private string SafeNetName(BusMaster master)
{
if (master == null || !master.IsConnected)
{
return(null);
}
return(master.Bus.Name);
}
public void Connect_MultipleMasters_NoErrors()
{
var master1 = new BusMaster <BusData8>();
var master2 = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
master1.ConnectTo(bus);
master2.ConnectTo(bus);
}
public void Write_DisabledMaster_Throws()
{
var uut = new BusMaster <BusData8>();
var newValue = new BusData8(0);
Action act = () => uut.Write(newValue);
act.ShouldThrow <InvalidOperationException>();
}
public void TestInitialize()
{
_uut = new OutputPort();
_portEnable = _uut.PortEnable.CreateConnection();
var inputBus = new Bus(8);
_uut.Input.ConnectTo(inputBus);
_input = new BusMaster(inputBus);
_input.IsEnabled = true;
}
public void TestInitialize()
{
_uut = new BusDecoder();
_output = _uut.Output.CreateConnection();
var inputBus = new Bus(16);
_uut.Input.ConnectTo(inputBus);
_input = new BusMaster(inputBus);
_input.IsEnabled = true;
}
public static BusMaster <T> CreateConnection <T>(this BusSlave <T> slave, string busName = null)
where T : BusData, new()
{
var master = new BusMaster <T>();
var bus = new Bus <T>(busName);
slave.ConnectTo(bus);
master.ConnectTo(bus);
return(master);
}
public void Write_Unconnected_DoesNotThrow()
{
var uut = new BusMaster <BusData8>();
var newValue = new BusData8(0);
uut.IsEnabled = true;
Action test = () => uut.Write(newValue);
test.ShouldNotThrow();
}
public DirectedGraphNode Add(BusMaster master, string ownerName = null)
{
if (!Visit(master) ||
(!master.IsConnected && !DisplayUnconnected))
{
return(FindNode(master));
}
var node = AddInternal(master, ownerName, SafeNetName(master));
return(node);
}
public void Write_BusValueChanged()
{
var uut = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
uut.ConnectTo(bus);
uut.IsEnabled = true;
var newValue = new BusData8(0);
uut.Write(newValue);
bus.AssertAllLevelsAre(DigitalLevel.Low);
}
public void ConnectTo_ChangeSource_BusValueCorrect()
{
var busWidth = 8;
var source = new Bus <BusData16>();
var uut = new BusTap(busWidth);
uut.ConnectTo(source);
var driver = new BusMaster(source);
driver.IsEnabled = true;
driver.Write(new BusData16(0xAA55));
uut.Value.ToUInt32().Should().Be(0x55);
}
public void IsEnabled_ToFalse_ChangesLevelsToFloating()
{
var uut = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
uut.ConnectTo(bus);
uut.IsEnabled = true;
var newValue = new BusData8(0);
uut.Write(newValue);
uut.IsEnabled = false;
uut.Value.AssertAllLevelsAre(DigitalLevel.Floating);
}
private IEnumerable <Component> CreateBusMasters()
{
for (int i = 0; i < NumMasters; i++)
{
BusMaster master = new BusMaster(i, i + 1, 8 * (NumMasters - i + 1));
object oi = (object)i;
Bind(() =>
{
master.Clk = _clk;
master.Request = _request[(int)oi];
master.Grant = _grant[(int)oi];
});
yield return(master);
}
}
public void Write_EventTriggers()
{
var master = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
master.ConnectTo(bus);
master.IsEnabled = true;
bus.MonitorEvents();
var newValue = new BusData8(0);
master.Write(newValue);
bus.ShouldRaise("OnChanged");
}
public void ConnectTo_ChangeSource_EventFires()
{
var busWidth = 8;
var source = new Bus <BusData16>();
var uut = new BusTap(busWidth);
uut.ConnectTo(source);
uut.MonitorEvents();
var driver = new BusMaster(source);
driver.IsEnabled = true;
driver.Write(new BusData16(0xAA55));
uut.ShouldRaise("OnChanged");
}
public static Bus GetOrAddBus(this BusMaster master, string busName = null)
{
Bus bus;
if (!master.IsConnected)
{
bus = new Bus(master.Value.Width, busName);
master.ConnectTo(bus);
}
else
{
bus = master.Bus;
}
return(bus);
}
public void Write_SingleMaster_SlaveSeesChanges()
{
var master = new BusMaster <BusData8>();
var slave = new BusSlave <BusData8>();
var bus = new Bus <BusData8>();
master.ConnectTo(bus);
slave.ConnectTo(bus);
master.IsEnabled = true;
var newValue = new BusData8(0);
master.Write(newValue);
slave.Value.AssertAllLevelsAre(DigitalLevel.Low);
}
public static Bus <T> GetOrAddBus <T>(this BusMaster <T> master, string busName = null)
where T : BusData, new()
{
Bus <T> bus;
if (!master.IsConnected)
{
bus = new Bus <T>(busName);
master.ConnectTo(bus);
}
else
{
bus = master.Bus;
}
return(bus);
}
public static Bus <T> ConnectTo <T>(this BusMaster <T> master, BusSlave <T> slave, string busName = null)
where T : BusData, new()
{
Bus <T> bus = Connect(master, slave, busName);
if (bus == null)
{
if (busName == null)
{
busName = master.Name;
}
bus = master.GetOrAddBus(busName);
slave.ConnectTo(bus);
}
return(bus);
}
public bool RemoveShip(string token)
{
ArbiterTreeNode node;
if (!_nodeByShipToken.Remove(token, out node))
{
return(false);
}
_shipPublicIds.Remove(PublicIdFromToken(token));
node.ShipCount--;
BusMaster.BroadcastMessage(new Messages.ShipDisconnected()
{
Token = token
});
return(true);
}
public void Write_MultipleMastersActivce_Error()
{
var master1 = new BusMaster <BusData8>();
var master2 = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
master1.ConnectTo(bus);
master2.ConnectTo(bus);
master1.IsEnabled = true;
master2.IsEnabled = true;
var loValue = new BusData8(0);
var noValue = new BusData8();
master1.Write(loValue);
Action act = () => master2.Write(loValue);
act.ShouldThrow <BusConflictException>();
}
public void Write_MultipleMasters_OneAtaTime()
{
var master1 = new BusMaster <BusData8>();
var master2 = new BusMaster <BusData8>();
var bus = new Bus <BusData8>();
master1.ConnectTo(bus);
master2.ConnectTo(bus);
master1.IsEnabled = true;
master2.IsEnabled = true;
var loValue = new BusData8(0);
var noValue = new BusData8();
master1.Write(loValue);
master1.Write(noValue);
master2.Write(loValue);
master2.Write(noValue);
master1.Write(loValue);
}
public string AddNewShip(out ArbiterTreeNode parentNode, string token)
{
if (token == null)
{
token = AddShipToken();
}
else
{
_shipPublicIds.Add(PublicIdFromToken(token));
}
parentNode = (ArbiterTreeNode)RootNode.RandomLeafNode();
_nodeByShipToken[token] = parentNode;
BusMaster.SendMessage(new Messages.ShipConnected()
{
Token = token
}, parentNode.Peer);
return(token);
}
private IEnumerable<Component> CreateBusMasters()
{
for (int i = 0; i < NumMasters; i++)
{
BusMaster master = new BusMaster(i, i + 1, 8 * (NumMasters - i + 1));
object oi = (object)i;
Bind(() =>
{
master.Clk = _clk;
master.Request = _request[(int)oi];
master.Grant = _grant[(int)oi];
});
yield return master;
}
}
