public void _Fx1E_add_I_Vx()
{
var registers = new RegisterModule();
registers.SetGeneralValue(0,
0x12);
registers.SetI(0x123);
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0xF0, //Add v0 and I, store in I
0x1E
};
emulator.LoadProgram(instructions);
emulator.Tick += (e,
a) =>
{
emulator.Stop();
};
emulator.Start();
Assert.Equal(0x123 + 0x12,
registers.GetI());
}
public void _Fx33_LD_B_Vx()
{
/*
* Stores the BCD of vx in I, I+1, and I+2 of memory
* 125:
* Hex: 0x7D
* BCD: 0001 0010 0101
*/
var registers = new RegisterModule();
registers.SetGeneralValue(0,
0x7D);
registers.SetI(0x123);
var memory = new MemoryModule(Enumerable.Repeat((byte)0x0,
4096));
var emulator = CHIP8Factory.GetChip8(registers: registers,
mem: memory);
var instructions = new byte[]
{
0xF0, //Store BCD of v0 in memory
0x33
};
emulator.LoadProgram(instructions);
emulator.Tick += (e,
a) =>
{
emulator.Stop();
};
emulator.Start();
var startPoint = registers.GetI();
var hundreds = memory[startPoint];
startPoint++;
var tens = memory[startPoint];
startPoint++;
var ones = memory[startPoint];
Assert.Equal(0x1,
hundreds);
Assert.Equal(0x2,
tens);
Assert.Equal(0x5,
ones);
}
public void _Annn_LD_I_addr()
{
var registers = new RegisterModule();
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0xA1,
0x23
};
emulator.LoadProgram(instructions);
emulator.Start();
Assert.Equal(0x123,
registers.GetI());
}
public void _Fx65_LD_Vx_I()
{
/*
* Set registers v0 through vx from memory starting at I
*/
var registers = new RegisterModule();
registers.SetI(0x278);
var startPoint = registers.GetI();
var memory = new MemoryModule(Enumerable.Repeat((byte)0x0,
4096));
memory[startPoint] = 0x7D;
startPoint++;
memory[startPoint] = 0x55;
startPoint++;
memory[startPoint] = 0x18;
startPoint++;
memory[startPoint] = 0x90;
var emulator = CHIP8Factory.GetChip8(registers: registers,
mem: memory);
var instructions = new byte[]
{
0xF3, //Set v0 - v3 from memory
0x65
};
emulator.LoadProgram(instructions);
emulator.Tick += (e,
a) =>
{
emulator.Stop();
};
emulator.Start();
var v0 = registers.GetGeneralValue(0);
var v1 = registers.GetGeneralValue(1);
var v2 = registers.GetGeneralValue(2);
var v3 = registers.GetGeneralValue(3);
Assert.Equal(0x7D,
v0);
Assert.Equal(0x55,
v1);
Assert.Equal(0x18,
v2);
Assert.Equal(0x90,
v3);
}
