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DirectPage and DirectPageIndirect

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scawful
2023-08-19 20:12:56 -04:00
parent 7dcbc7f83c
commit 536136d8c9
5 changed files with 49 additions and 67 deletions
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58
test/cpu_test.cc
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@@ -110,7 +110,6 @@ class MockMemory : public Memory {
});
}
private:
std::vector<uint8_t> memory_;
uint16_t SP_ = 0x01FF;
};
@@ -209,58 +208,53 @@ TEST_F(CPUTest, ADC_AbsoluteLong) {
EXPECT_EQ(cpu.A, 0x06);
}
/**
* Direct Page Unimplemented
*
TEST_F(CPUTest, ADC_DirectPage) {
cpu.A = 0x01;
cpu.D = 0x0001;
std::vector<uint8_t> data = {0x65, 0x01, 0x05};
std::vector<uint8_t> data = {0x65, 0x01, 0x00};
mock_memory.SetMemoryContents(data);
mock_memory.InsertMemory(0x100, {0x05, 0x05, 0x05});
EXPECT_CALL(mock_memory, ReadByte(_)).WillOnce(Return(0x01));
EXPECT_CALL(mock_memory, ReadByte(0x100)).WillOnce(Return(0x05));
cpu.ExecuteInstruction(0x65); // ADC Direct Page
EXPECT_EQ(cpu.A, 0x06);
}
// ADC Direct Page Indirect
TEST_F(CPUTest, ADC_DirectPageIndirect) {
cpu.A = 0x01; // A register
cpu.X = 0x02; // X register
cpu.PC = 0; // PC register
cpu.status = 0x00; // 16-bit mode
std::vector<uint8_t> data = {0x72, 0x04, 0x00, 0x00, 0x20, 0x05, 0xFF};
cpu.A = 0x02;
cpu.D = 0x2000; // Setting Direct Page register to 0x2000
std::vector<uint8_t> data = {0x72, 0x10}; // ADC (dp)
mock_memory.SetMemoryContents(data);
mock_memory.InsertMemory(0x2010, {0x00, 0x30}); // [0x2010] = 0x3000
mock_memory.InsertMemory(0x3000, {0x05}); // [0x3000] = 0x05
// Get the absolute address
EXPECT_CALL(mock_memory, ReadWord(0x0001)).WillOnce(Return(0x0004));
EXPECT_CALL(mock_memory, ReadByte(0x0000)).WillOnce(Return(0x10));
EXPECT_CALL(mock_memory, ReadWord(0x2010)).WillOnce(Return(0x3000));
EXPECT_CALL(mock_memory, ReadByte(0x3000)).WillOnce(Return(0x05));
cpu.ExecuteInstruction(0x72); // ADC Indirect Indexed with X
EXPECT_EQ(cpu.A, 0x06);
cpu.ExecuteInstruction(0x72); // ADC (dp)
EXPECT_EQ(cpu.A, 0x07); // 0x02 + 0x05 = 0x07
}
// ADC Direct Page Indexed Indirect, X
TEST_F(CPUTest, ADC_DirectPageIndexedIndirectX) {
cpu.A = 0x01;
cpu.X = 0x02;
cpu.PC = 1;
cpu.status = 0x00; // 16-bit mode
std::vector<uint8_t> data = {0x61, 0x01, 0x18, 0x00, 0x05};
cpu.A = 0x03;
cpu.D = 0x2000; // Setting Direct Page register to 0x2000
std::vector<uint8_t> data = {0x61, 0x10}; // ADC (dp, X)
mock_memory.SetMemoryContents(data);
mock_memory.InsertMemory(0x2012, {0x00, 0x30}); // [0x2012] = 0x3000
mock_memory.InsertMemory(0x3000, {0x06}); // [0x3000] = 0x06
EXPECT_CALL(mock_memory, ReadByte(0x0001)).WillOnce(Return(0x0001));
cpu.X = 0x02; // X register
EXPECT_CALL(mock_memory, ReadByte(0x0000)).WillOnce(Return(0x10));
EXPECT_CALL(mock_memory, ReadWord(0x2012)).WillOnce(Return(0x3000));
EXPECT_CALL(mock_memory, ReadByte(0x3000)).WillOnce(Return(0x06));
EXPECT_CALL(mock_memory, ReadWord(0x0003)).WillOnce(Return(0x0005));
cpu.ExecuteInstruction(0x61); // ADC Indexed Indirect
EXPECT_EQ(cpu.A, 0x06);
cpu.ExecuteInstruction(0x61); // ADC (dp, X)
EXPECT_EQ(cpu.A, 0x09); // 0x03 + 0x06 = 0x09
}
**/
TEST_F(CPUTest, ADC_CheckCarryFlag) {
cpu.A = 0xFF;