public void TestRamContentsEmpty()
{
RAM ram = new RAM();
string[] ADDRS = new string[16] {
"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111", "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"
};
try
{
List <string> RamContentsData = new List <string>();
RAMProgram rmp = new RAMProgram(RamContentsData);
ram.LoadProgram(rmp);
for (int i = 0; i < 15; i++)
{
// Since the RAMProgram was empty, the RAMProgam should fill will all zeros, so the RAM should be filled will all zeros.
Assert.IsTrue(string.Equals(ram.GetWordAt(ADDRS[i]), "00000000"));
}
}
catch (Exception e)
{
Assert.Fail(e.ToString());
}
ram.ClearRAM();
}
public void TestRamContentFull()
{
RAM ram = new RAM();
string[] ADDRS = new string[16] {
"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111", "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"
};
try
{
List <string> RamContentsData = new List <string>
{
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101"
};
RAMProgram rmp = new RAMProgram(RamContentsData);
ram.LoadProgram(rmp);
// Check to make sure the RAM entries and the list<string> share the same values
for (int i = 0; i < 15; i++)
{
Assert.IsTrue(Equals(RamContentsData[i], ram.GetWordAt(ADDRS[i])));
}
// Check to see it i == i+1, should be false
for (int i = 0; i < 14; i++)
{
Assert.IsFalse(Equals(RamContentsData[i], ram.GetWordAt(ADDRS[i + 1])));
}
}
catch (Exception e)
{
Assert.Fail(e.ToString());
}
ram.ClearRAM();
}
public void TestRamFull()
{
RAM ram = new RAM();
try
{
List <string> RamContentsData = new List <string>
{
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"10101010",
"01010101",
"01010101",
"01010101"
};
RAMProgram rmp = new RAMProgram(RamContentsData);
ram.LoadProgram(rmp);
Assert.IsTrue(true);
}
catch (Exception e)
{
Assert.Fail(e.ToString());
}
ram.ClearRAM();
}
// *************************************************************************
// *************************************************************************
// Engine Runtime
// *************************************************************************
public void Run()
{
Clock clock = new Clock();
TicTok tictok = new TicTok();
tictok.Init();
AReg areg = new AReg();
TReg treg = new TReg();
BReg breg = new BReg();
CReg creg = new CReg();
IReg ireg = new IReg();
IPort1 iport1 = new IPort1();
IPort2 iport2 = new IPort2();
MDR mdr = new MDR();
RAM ram = new RAM();
mdr.SetRefToRAM(ref ram);
ALU alu = new ALU(ref areg, ref treg);
areg.SetALUReference(ref alu);
breg.SetALUReference(ref alu);
creg.SetALUReference(ref alu);
OReg3 oreg3 = new OReg3(ref alu);
OReg4 oreg4 = new OReg4(ref alu);
HexadecimalDisplay hexadecimalDisplay = new HexadecimalDisplay(ref oreg3);
Flag flagReg = new Flag(ref alu);
PC pc = new PC(ref flagReg);
MAR mar = new MAR(ref ram);
SEQ seq = SEQ.Instance();
Wbus.Instance().Value = string.Concat(Enumerable.Repeat('0', 16));
areg.Subscribe(clock);
treg.Subscribe(clock);
breg.Subscribe(clock);
creg.Subscribe(clock);
ireg.Subscribe(clock);
mar.Subscribe(clock);
pc.Subscribe(clock);
alu.Subscribe(clock); // ALU must come after A and T
flagReg.Subscribe(clock);
ram.Subscribe(clock);
mdr.Subscribe(clock);
oreg3.Subscribe(clock);
hexadecimalDisplay.Subscribe(clock);
oreg4.Subscribe(clock);
// Load the program into the RAM
ram.LoadProgram(Program);
// Load the intsructionSet into the SEQ
seq.Load(InstructionSet);
Frame tempFrame;
#region Program_Exec
// Since T1-T3 for all of the Intruction is the same,
// LDA or "0000" will be used as the intruction for all T1-T3's
clock.IsEnabled = true;
int max_loop_count = 10_000;
int loop_counter = 0;
int TState = 1;
// A basic empty instruction state with 3 TStates since on the 4th the instruction
// will be known and set to a new object reference.
Instruction currentInstruction = new Instruction()
{
OpCode = "???",
TStates = 4 // Since by 4 TStates it should know what instruction it is on
};
List <string> controlWords = new List <string>();
bool? didntJump = null;
while (clock.IsEnabled)
{
// Log the Instruction
if (TState == 4)
{
currentInstruction = InstructionSet.Instructions.FirstOrDefault(i => i.BinCode.Equals(ireg.RegContent));
seq.LoadBackupControlWords(currentInstruction.MicroCode);
string iname = currentInstruction.OpCode;
int operandVal = Convert.ToInt32(ireg.RegContent, 2);
string hexOperand = "0x" + operandVal.ToString("X");
}
if (TState <= 3)
{
seq.UpdateControlWordReg(TState, "00000000", didntJump);
if (didntJump ?? false)
{
pc.SkipByte();
didntJump = null;
}
}
else
{
seq.UpdateControlWordReg(TState, ireg.RegContent);
}
clock.SendTicTok(tictok);
tictok.ToggleClockState();
clock.SendTicTok(tictok);
tictok.ToggleClockState();
tempFrame = new Frame(currentInstruction, TState, iport1, iport2, pc, mar, ram,
ram.RAMDump(), mdr, ireg, SEQ.Instance(),
Wbus.Instance().Value, areg, alu, flagReg,
treg, breg, creg, oreg3, oreg4, hexadecimalDisplay);
_FrameStack.Add(tempFrame);
// HLT
if (ireg.RegContent.Equals("01110110", StringComparison.Ordinal) && TState == 5)
{
clock.IsEnabled = false;
_RAMDump = ram.RAMDump();
}
if (loop_counter >= max_loop_count)
{
throw new EngineRuntimeException("Engine Error: Infinite Loop Detected");
}
else
{
loop_counter++;
}
if (TState == 7 && currentInstruction.OpCode.StartsWith('J'))
{
pc.CheckForJumpCondition();
// PC is going to jump so do not let it fetch the next byte and immediately endx
if (!pc.WontJump)
{
currentInstruction.TStates = 7;
didntJump = true;
}
}
if (TState < currentInstruction.TStates)
{
TState++;
}
else
{
TState = 1;
currentInstruction = new Instruction()
{
OpCode = "???",
TStates = 4 // Since by 4 TStates it should know what instruction it is on
};
}
}
OutputReg = oreg3.ToString();
#endregion Program_Exec
}
// *************************************************************************
// *************************************************************************
// Engine Runtime
// *************************************************************************
public void Run()
{
//Log.Information("SAP1Emu: Begin Engine Run");
//Log.Verbose("SAP1Emu: Initializing Registers");
Clock clock = new Clock();
TicTok tictok = new TicTok();
tictok.Init();
AReg areg = new AReg();
BReg breg = new BReg();
IReg ireg = new IReg();
OReg oreg = new OReg();
RAM ram = new RAM();
PC pc = new PC(ref areg);
ALU alu = new ALU(ref areg, ref breg);
MReg mreg = new MReg(ref ram);
SEQ seq = SEQ.Instance();
Wbus.Instance().Value = "00000000";
Flags.Instance().Clear();
areg.Subscribe(clock);
breg.Subscribe(clock);
ireg.Subscribe(clock);
mreg.Subscribe(clock);
oreg.Subscribe(clock);
pc.Subscribe(clock);
alu.Subscribe(clock); // ALU must come after A and B
ram.Subscribe(clock);
// Log.Verbose("SAP1Emu: Initialized Registers");
// Log.Information("SAP1Emu: Loading Ram");
// Load the program into the RAM
ram.LoadProgram(Program);
// Log.Information("SAP1Emu: RAM:\n{RAM}", Program.RamContents);
// Load the intsructionSet into the SEQ
seq.Load(InstructionSet);
// Log.Information($"SAP1Emu: Loaded Instruction Set: \"{InstructionSet.SetName}\"");
Frame tempFrame;
#region Program_Exec
// Since T1-T3 for all of the Intruction is the same,
// LDA or "0000" will be used as the intruction for all T1-T3's
clock.IsEnabled = true;
// TODO: Cleanup old code stubs
// These vars will make sure that the engine will not hang if there is an infinite loop
// int warning1_loop_counter = 3000;
// int warning2_loop_counter = 5000;
// int warning3_loop_counter = 7000;
// int warning4_loop_counter = 9000;
int max_loop_count = 10000;
int loop_counter = 0;
int TState = 1;
// Log.Information("SAP1Emu: Start Program Execution");
while (clock.IsEnabled)
{
if (TState <= 3)
{
seq.UpdateControlWordReg(TState, "0000");
}
else
{
seq.UpdateControlWordReg(TState, ireg.ToString());
}
// Log the Instruction
if (TState == 4)
{
string iname = InstructionSet.Instructions.Find(x => x.BinCode.Equals(ireg.ToString())).OpCode;
int operandVal = Convert.ToInt32(ireg.ToString_Frame_Use().Substring(4, 4), 2);
string hexOperand = "0x" + operandVal.ToString("X");
// Log.Information($"SAP1Emu: Instruction: {iname}, Operand: {hexOperand}");
}
clock.SendTicTok(tictok);
tictok.ToggleClockState();
clock.SendTicTok(tictok);
tictok.ToggleClockState();
tempFrame = new Frame(ireg.ToString(), TState, areg, breg, ireg, mreg, oreg, pc, alu, ram.RAMDump(), ram, seq, Wbus.Instance().ToString(), Flags.Instance(), _decoder, InstructionSet.SetName);
_FrameStack.Add(tempFrame);
if (ireg.ToString() == "1111" && TState == 6)
{
// Log.Information("SAP1Emu: HLT Detected");
clock.IsEnabled = false;
}
// Infinite Loop Checks
//if(loop_counter == warning1_loop_counter)
//{
// Log.Warning($"SAP1Emu: Infinite Loop Warning: interations count: {warning1_loop_counter} ");
//}
//else if (loop_counter == warning2_loop_counter)
//{
// Log.Warning($"SAP1Emu: Infinite Loop Warning: interations count: {warning2_loop_counter} ");
//}
//else if (loop_counter == warning3_loop_counter)
//{
// Log.Warning($"SAP1Emu: Infinite Loop Warning: interations count: {warning3_loop_counter} ");
//}
//else if (loop_counter == warning4_loop_counter)
//{
// Log.Warning($"SAP1Emu: Infinite Loop Warning: interations count: {warning4_loop_counter} ");
//}
if (loop_counter >= max_loop_count)
{
// Log.Fatal($"SAP1Emu: Infinite Loop Fatal Error: Infinite Loop Detected");
// Log.CloseAndFlush();
throw new EngineRuntimeException("Engine Error: Infinite Loop Detected");
}
else
{
loop_counter++;
}
if (TState < 6)
{
TState++;
}
else
{
TState = 1;
}
}
// Log.Information("SAP1Emu: End Program Execution");
OutPutRegContents = oreg.ToString();
// Log.Information("SAP1Emu: End Engine Run");
// Log.CloseAndFlush();
#endregion Program_Exec
}