initial commit

memory.cpp

@@ -0,0 +1,44 @@
+#include "memory.h"
+
+#include <cstdlib>
+
+#include "Bus.h"
+
+CPUMemoryAccessor::CPUMemoryAccessor(Bus* bus)
+{
+    ram = static_cast<std::uint8_t*>(malloc(0x0200));
+    this->bus = bus;
+}
+
+void CPUMemoryAccessor::write(std::uint16_t _addr, std::uint8_t value)
+{
+    if (isRamAddress(_addr))
+    {
+        writeToRam(_addr, value);
+    }
+}
+
+std::uint8_t CPUMemoryAccessor::read8(const std::uint16_t _addr)
+{
+    if (isRamAddress(_addr))
+    {
+        return readFromRam(_addr);
+    }
+
+    return 0x00;
+}
+
+std::uint8_t CPUMemoryAccessor::readFromRam(const std::uint16_t _addr) const
+{
+    return ram[_addr];
+}
+
+void CPUMemoryAccessor::writeToRam(const std::uint16_t _addr, const std::uint8_t value) const
+{
+    ram[_addr] = value;
+}
+
+bool CPUMemoryAccessor::isRamAddress(const std::uint16_t _addr)
+{
+    return _addr <= 0x0200;
+}