public void _Cxkk_RND_vx_byte(byte kk,
byte rand)
{
var registers = new RegisterModule();
var random = new TestRandom(rand);
var emulator = CHIP8Factory.GetChip8(registers: registers,
random: random);
var instructions = new byte[]
{
0xC0, //Set v0 = kk & random byte
kk
};
emulator.LoadProgram(instructions);
emulator.Tick += (e,
a) =>
{
emulator.Stop();
};
emulator.Start();
Assert.Equal(rand & kk,
registers.GetGeneralValue(0));
}
public void _8xy3_XOR_vx_vy(byte x,
byte y)
{
/*
* 8xy3 - Performs a bitwise exclusive OR on the values of Vx and Vy, then stores the result in Vx.
*/
var registers = new RegisterModule();
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0x60, //LD v0 with x,
x,
0x61, //LD v1 with y
y,
0x80, //Bitwise xor, store in v0
0x13
};
emulator.LoadProgram(instructions);
emulator.Start();
var expectedResult = x ^ y;
Assert.Equal(expectedResult,
registers.GetGeneralValue(0));
}
public void _6xkk_LD_vx_byte()
{
/*
* 6xkk - LD Vx, byte Set Vx = kk. The interpreter puts the value kk into register Vx.
*/
var registers = new RegisterModule();
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0x60, //LD v0 with byte 0x12
0x12
};
emulator.LoadProgram(instructions);
emulator.Start();
Assert.Equal(0x12,
registers.GetGeneralValue(0));
}
public void _8xy0_LD_vx_vy()
{
/*
* 8xy0 - Stores the value of register Vy in register Vx.
*/
var registers = new RegisterModule();
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0x61, //LD v1 with byte 0x12
0x12,
0x80, // Store value at v1 in v0
0x10
};
emulator.LoadProgram(instructions);
emulator.Start();
Assert.Equal(0x12,
registers.GetGeneralValue(0));
}
public void _7xkk_LD_vx_byte()
{
/*
* 7xkk - Adds the value kk to the value of register Vx, then stores the result in Vx.
*/
var registers = new RegisterModule();
var emulator = CHIP8Factory.GetChip8(registers: registers);
var instructions = new byte[]
{
0x60, //LD v0 with byte 0x12
0x12,
0x70, // Add 0x10 to v0 and save it in v0
0x10
};
emulator.LoadProgram(instructions);
emulator.Start();
Assert.Equal(0x22,
registers.GetGeneralValue(0));
}
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);
}