diff --git a/tests/memory.cc b/tests/memory.cc
new file mode 100644
index 0000000..252ed7a
--- /dev/null
+++ b/tests/memory.cc
@@ -0,0 +1,121 @@
+#include "memory.hh"
+#include <catch2/catch_test_macros.hpp>
+
+static constexpr auto TAG = "[memory]";
+
+using namespace matar;
+
+class MemFixture {
+  public:
+    MemFixture()
+      : memory(std::array<uint8_t, Memory::BIOS_SIZE>(),
+               std::vector<uint8_t>(Header::HEADER_SIZE)) {}
+
+  protected:
+    Memory memory;
+};
+
+TEST_CASE_METHOD(MemFixture, "bios", TAG) {
+    memory.write(0, 0xAC);
+    CHECK(memory.read(0) == 0xAC);
+
+    memory.write(0x3FFF, 0x48);
+    CHECK(memory.read(0x3FFF) == 0x48);
+
+    memory.write(0x2A56, 0x10);
+    CHECK(memory.read(0x2A56) == 0x10);
+}
+
+TEST_CASE_METHOD(MemFixture, "board wram", TAG) {
+    memory.write(0x2000000, 0xAC);
+    CHECK(memory.read(0x2000000) == 0xAC);
+
+    memory.write(0x203FFFF, 0x48);
+    CHECK(memory.read(0x203FFFF) == 0x48);
+
+    memory.write(0x2022A56, 0x10);
+    CHECK(memory.read(0x2022A56) == 0x10);
+}
+
+TEST_CASE_METHOD(MemFixture, "chip wram", TAG) {
+    memory.write(0x3000000, 0xAC);
+    CHECK(memory.read(0x3000000) == 0xAC);
+
+    memory.write(0x3007FFF, 0x48);
+    CHECK(memory.read(0x3007FFF) == 0x48);
+
+    memory.write(0x3002A56, 0x10);
+    CHECK(memory.read(0x3002A56) == 0x10);
+}
+
+TEST_CASE_METHOD(MemFixture, "palette ram", TAG) {
+    memory.write(0x5000000, 0xAC);
+    CHECK(memory.read(0x5000000) == 0xAC);
+
+    memory.write(0x50003FF, 0x48);
+    CHECK(memory.read(0x50003FF) == 0x48);
+
+    memory.write(0x5000156, 0x10);
+    CHECK(memory.read(0x5000156) == 0x10);
+}
+
+TEST_CASE_METHOD(MemFixture, "video ram", TAG) {
+    memory.write(0x6000000, 0xAC);
+    CHECK(memory.read(0x6000000) == 0xAC);
+
+    memory.write(0x6017FFF, 0x48);
+    CHECK(memory.read(0x6017FFF) == 0x48);
+
+    memory.write(0x6012A56, 0x10);
+    CHECK(memory.read(0x6012A56) == 0x10);
+}
+
+TEST_CASE_METHOD(MemFixture, "oam obj ram", TAG) {
+    memory.write(0x7000000, 0xAC);
+    CHECK(memory.read(0x7000000) == 0xAC);
+
+    memory.write(0x70003FF, 0x48);
+    CHECK(memory.read(0x70003FF) == 0x48);
+
+    memory.write(0x7000156, 0x10);
+    CHECK(memory.read(0x7000156) == 0x10);
+}
+
+TEST_CASE("rom", TAG) {
+    // 32 megabyte ROM
+    Memory memory(std::array<uint8_t, Memory::BIOS_SIZE>(),
+                  std::vector<uint8_t>(32 * 1024 * 1024));
+
+    SECTION("ROM1") {
+        memory.write(0x8000000, 0xAC);
+        CHECK(memory.read(0x8000000) == 0xAC);
+
+        memory.write(0x9FFFFFF, 0x48);
+        CHECK(memory.read(0x9FFFFFF) == 0x48);
+
+        memory.write(0x8ef0256, 0x10);
+        CHECK(memory.read(0x8ef0256) == 0x10);
+    }
+
+    SECTION("ROM2") {
+        memory.write(0xA000000, 0xAC);
+        CHECK(memory.read(0xA000000) == 0xAC);
+
+        memory.write(0xBFFFFFF, 0x48);
+        CHECK(memory.read(0xBFFFFFF) == 0x48);
+
+        memory.write(0xAEF0256, 0x10);
+        CHECK(memory.read(0xAEF0256) == 0x10);
+    }
+
+    SECTION("ROM3") {
+        memory.write(0xC000000, 0xAC);
+        CHECK(memory.read(0xC000000) == 0xAC);
+
+        memory.write(0xDFFFFFF, 0x48);
+        CHECK(memory.read(0xDFFFFFF) == 0x48);
+
+        memory.write(0xCEF0256, 0x10);
+        CHECK(memory.read(0xCEF0256) == 0x10);
+    }
+}
diff --git a/tests/meson.build b/tests/meson.build
index 75ab8f7..acc5726 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -6,7 +6,8 @@ src = include_directories('../src')
 
 tests_sources = files(
   'main.cc',
-  'bus.cc'
+  'bus.cc',
+  'memory.cc'
 )
 
 subdir('cpu')