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Implementing the LDX

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This commit is contained in:
AnonymusRaccoon
2020-02-13 17:42:41 +01:00
parent 6fca2293ee
commit 9cf41e6ff4
4 changed files with 53 additions and 26 deletions
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sources/CPU/Instructions/MemoryInstructions.cpp
+13
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@@ -55,4 +55,17 @@ namespace ComSquare::CPU
}
this->_registers.p.z = this->_registers.a == 0x0;
}
void CPU::LDX(uint24_t addr)
{
if (this->_registers.p.x_b) {
this->_registers.x = this->_bus->read(addr);
this->_registers.p.n = this->_registers.xl & 0xF0u;
} else {
this->_registers.xl = this->_bus->read(addr);
this->_registers.xh = this->_bus->read(addr + 1);
this->_registers.p.n = this->_registers.x & 0xF000u;
}
this->_registers.p.z = this->_registers.x == 0x0;
}
}