3 files changed, 52 insertions, 0 deletions
diff --git a/arch/x86_64/include/arch/bus/isa.hpp b/arch/x86_64/include/arch/bus/isa.hpp
new file mode 100644
index 0000000..5deed25
--- /dev/null
+++ b/arch/x86_64/include/arch/bus/isa.hpp
@@ -0,0 +1,18 @@
+#ifndef TEACHOS_X86_64_BUS_ISA_HPP
+#define TEACHOS_X86_64_BUS_ISA_HPP
+
+#include "kapi/devices/bus.hpp"
+
+#include <cstddef>
+
+namespace arch::bus
+{
+
+  struct isa final : public kapi::devices::bus
+  {
+    isa(std::size_t major);
+  };
+
+}  // namespace arch::bus
+
+#endif  // TEACHOS_X86_64_BUS_ISA_HPP
diff --git a/arch/x86_64/include/arch/device_io/port_io.hpp b/arch/x86_64/include/arch/device_io/port_io.hpp
index 70773dd..4c8d66a 100644
--- a/arch/x86_64/include/arch/device_io/port_io.hpp
+++ b/arch/x86_64/include/arch/device_io/port_io.hpp
@@ -102,6 +102,11 @@ namespace arch::io
                                                       : std::string_view{"eax"};
   };
 
+  auto inline wait() -> void
+  {
+    port<0x80, std::uint8_t, port_write>::write<std::uint8_t>(0);
+  }
+
 }  // namespace arch::io
 
 #endif
 \ No newline at end of file
diff --git a/arch/x86_64/include/arch/devices/legacy_pit.hpp b/arch/x86_64/include/arch/devices/legacy_pit.hpp
new file mode 100644
index 0000000..de742ae
--- /dev/null
+++ b/arch/x86_64/include/arch/devices/legacy_pit.hpp
@@ -0,0 +1,29 @@
+#ifndef TEACHOS_ARCH_X86_64_DEVICES_LEGACY_PIT_HPP
+#define TEACHOS_ARCH_X86_64_DEVICES_LEGACY_PIT_HPP
+
+#include "kapi/devices/device.hpp"
+#include "kapi/interrupts.hpp"
+
+#include <cstddef>
+#include <cstdint>
+
+namespace arch::devices
+{
+
+  struct legacy_pit : kapi::devices::device, kapi::interrupts::handler
+  {
+    legacy_pit(std::size_t major, std::uint32_t frequency_in_hz);
+
+    auto init() -> bool override;
+
+    auto handle_interrupt(std::uint32_t irq_number) -> kapi::interrupts::status override;
+
+  private:
+    std::uint32_t m_irq_number{};
+    std::uint32_t m_frequency_in_hz{};
+    std::uint64_t m_ticks{};
+  };
+
+}  // namespace arch::devices
+
+#endif
+\ No newline at end of file