diff --git a/src/crab/thumb/load_store_register_offset.cr b/src/crab/thumb/load_store_register_offset.cr
new file mode 100644
index 0000000..f9f8adc
--- /dev/null
+++ b/src/crab/thumb/load_store_register_offset.cr
@@ -0,0 +1,16 @@
+module THUMB
+    def thumb_load_store_register_offset(instr : Word) : Nil
+      load_and_byte_quantity = bits(instr, 10..11)
+      ro = bits(instr, 6..8)
+      rb = bits(instr, 3..5)
+      rd = bits(instr, 0..2)
+      address = @r[rb] &+ @r[ro]
+      case load_and_byte_quantity
+      when 0b00 then @gba.bus[address] = @r[rd]
+      when 0b01 then @gba.bus[address] = 0xFF_u8 & @r[rd]
+      when 0b10 then @r[rd] = @gba.bus.read_word address
+      when 0b11 then @r[rd] = 0xFFFFFFFF_u32 & @gba.bus[address]
+      end
+    end
+  end
+  
\ No newline at end of file
diff --git a/src/crab/thumb/thumb.cr b/src/crab/thumb/thumb.cr
index 9fddb8a..7539323 100644
--- a/src/crab/thumb/thumb.cr
+++ b/src/crab/thumb/thumb.cr
@@ -31,7 +31,7 @@ module THUMB
       elsif idx & 0b11110010 == 0b01010010
         lut[idx] = ->thumb_load_store_sign_extended(Word)
       elsif idx & 0b11110010 == 0b01010000
-        # load/store with register offset
+        lut[idx] = ->thumb_load_store_register_offset(Word)
       elsif idx & 0b11111000 == 0b01001000
         lut[idx] = ->thumb_pc_relative_load(Word)
       elsif idx & 0b11111100 == 0b01000100