public void ExecuteNextInstructionWhenCalledFiresInstructionWillExecuteIfWired()
{
var receivedEvents = new Dictionary<ushort, Instruction>();
var reader = new StringReader("SET PUSH, 0x10");
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var instructionBuilder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(instructionBuilder) { Memory = memory };
cpu.InstructionWillExecute += receivedEvents.Add;
cpu.ExecuteNextInstruction();
Assert.That(receivedEvents.Keys.First() == program.ToList()[0]);
}
public void CanStepThrougthModifiedNotchSample()
{
const string Code =
@" ;Try some basic stuff
SET A, 0x30 ; 7c01 0030
SET [0x1000], 0x20 ; 7de1 1000 0020
SUB A, [0x1000] ; 7803 1000
IFN A, 0x10 ; c00d
SET PC, crash ; 7dc1 001a [*]
; Do a loopy thing
SET I, 10 ; a861
SET A, 0x2000 ; 7c01 2000
:loop SET [0x2000+I], [A] ; 2161 2000
SUB I, 1 ; 8463
IFN I, 0 ; 806d
SET PC, loop ; 7dc1 000d [*]
; Call a subroutine
SET X, 0x4 ; 9031
JSR testsub ; 7c10 0018 [*]
SET PC, crash ; 7dc1 001a [*]
:testsub SHL X, 4 ; 9037
SET PC, POP ; 61c1
; Hang forever. X should now be 0x40 if everything went right.
:crash SET A, 0 ; 7dc1 001a [*]";
var reader = new StringReader(Code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var executed = true;
while (executed)
{
executed = cpu.ExecuteNextInstruction();
}
Assert.That(cpu.ReadGeneralPursoseRegisterValue((ushort)RegisterIdentifier.RegX), Is.EqualTo(0x40));
}
public void CanStepThrougthHelloWorldSample()
{
const string Code = @"
; Assembler test for DCPU
; by Markus Persson
set a, 0xbeef ; Assign 0xbeef to register a
set [0x1000], a ; Assign memory at 0x1000 to value of register a
ifn a, [0x1000] ; Compare value of register a to memory at 0x1000 ..
set PC, end ; .. and jump to end if they don't match
set i, 0 ; Init loop counter, for clarity
:nextchar ife [data+i], 0 ; If the character is 0 ..
set PC, end ; .. jump to the end
set [0x8000+i], [data+i] ; Video ram starts at 0x8000, copy char there
add i, 1 ; Increase loop counter
set PC, nextchar ; Loop
:data dat ""Hello world!"", 0 ; Zero terminated string
:end SET A, 1 ; Freeze the CPU forever";
var reader = new StringReader(Code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var receivedEvents = new Dictionary<int, ushort>();
memory.VideoMemoryDidChange += receivedEvents.Add;
var executed = true;
while (executed)
{
executed = cpu.ExecuteNextInstruction();
}
const string ExpectedValues = "\"Helloworld!\"";
var i = 0;
foreach (var expectedValue in ExpectedValues)
{
Assert.That(receivedEvents[0x8000 + i], Is.EqualTo((ushort)expectedValue));
i++;
}
}
public void ExecuteWhenCalledWithJsrSetsProgramCounterToOperandValue()
{
var reader = new StringReader("JSR 0x04");
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
cpu.SetProgramCounter(0x10);
var instruction = builder.Build(program.ToList()[0], cpu);
instruction.Execute();
Assert.That(cpu.ProgramCounter, Is.EqualTo(0x04));
}
public void ExecuteWhenCalledWithIfEqualsAndResultIsFalseSetsIgnoreNextInstruction()
{
var reader = new StringReader("IFE A, 1");
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction = builder.Build(program.ToList()[0], cpu);
instruction.Execute();
Assert.That(cpu.IgnoreNextInstruction, Is.EqualTo(true));
}
public void ExecuteWhenCalledWithSubLiteralToRegisterValueSetsCorrectRegisterValue(
string code, ushort registerAddress, int expectedValue)
{
var reader = new StringReader(code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction1 = builder.Build(program.ToList()[0], cpu);
var instruction2 = builder.Build(program.ToList()[1], cpu);
instruction1.Execute();
instruction2.Execute();
Assert.That(cpu.ReadGeneralPursoseRegisterValue(registerAddress), Is.EqualTo(expectedValue));
}
public void ExecuteWhenCalledWithSetRegisterWithPopSetsCorrectRegistryValue()
{
const string Code = @"SET PUSH, 0x10
SET I, POP";
var reader = new StringReader(Code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction1 = builder.Build(program.ToList()[0], cpu);
var instruction2 = builder.Build(program.ToList()[1], cpu);
instruction1.Execute();
instruction2.Execute();
Assert.That(cpu.ReadGeneralPursoseRegisterValue((ushort)RegisterIdentifier.RegI), Is.EqualTo(0x10));
}
public void BuildWhenCalledForRawInstructionBuildsExpectedInstructionToken(
string code)
{
var reader = new StringReader(code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction = builder.Build(program.ToList()[0], cpu);
Assert.That(instruction.Token, Is.EqualTo(code.Substring(0, 3)));
}
public void ExecuteWhenCalledWithSetPushWithLiteralSetsCorrectMemoryValue()
{
var reader = new StringReader("SET PUSH, 0x10");
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction = builder.Build(program.ToList()[0], cpu);
instruction.Execute();
Assert.That(cpu.ReadMemoryValueAtAddress(cpu.StackPointer), Is.EqualTo(0x10));
}
public void ExecuteWhenCalledWithSetOffsetMemoryAddressWithNextWordSetsCorrectMemoryValue(
string code, ushort memoryAddress, int expectedValue)
{
var reader = new StringReader(code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction = builder.Build(program.ToList()[0], cpu);
instruction.Execute();
Assert.That(cpu.ReadMemoryValueAtAddress(memoryAddress), Is.EqualTo(expectedValue));
}
public void ExecuteWhenCalledWithPeekDoesNotChangeStackPointer()
{
const string Code = @"SET PUSH, 0x10
SET I, PEEK";
var reader = new StringReader(Code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction1 = builder.Build(program.ToList()[0], cpu);
var instruction2 = builder.Build(program.ToList()[1], cpu);
instruction1.Execute();
instruction2.Execute();
Assert.That(cpu.StackPointer, Is.EqualTo(ushort.MaxValue));
}
public void ExecuteWhenCalledAndOperationOverflowsSetsOverflowRegister(string code, int expectedValue)
{
var reader = new StringReader(code);
var lexer = new CodeLexer(reader, this.matchers);
var directOperandFactory = new DirectOperandFactory();
var indirectOperandFactory = new IndirectOperandFactory();
var parser = new Parser(lexer, directOperandFactory, indirectOperandFactory);
var statments = parser.Parse();
var assembler = new Assembler();
var program = assembler.AssembleStatments(statments);
var operandFactory = new InstructionOperandFactory();
var builder = new InstructionBuilder(operandFactory);
var memory = new Memory();
memory.LoadData(program);
var cpu = new Cpu(builder) { Memory = memory };
var instruction1 = builder.Build(program.ToList()[0], cpu);
var instruction2 = builder.Build(program.ToList()[1], cpu);
instruction1.Execute();
cpu.IncrementProgramCounter();
instruction2.Execute();
Assert.That(cpu.Overflow, Is.EqualTo(expectedValue));
}