diff --git a/src/crab/gba/dma.cr b/src/crab/gba/dma.cr
index dfe81b7..ee678ce 100644
--- a/src/crab/gba/dma.cr
+++ b/src/crab/gba/dma.cr
@@ -42,7 +42,6 @@ module GBA
     end
 
     def [](io_addr : Int) : UInt8
-      return 0_u8 if io_addr >= 0xE0 # todo: OOB read
       channel = (io_addr - 0xB0) // 12
       reg = (io_addr - 0xB0) % 12
       case reg
@@ -56,7 +55,6 @@ module GBA
     end
 
     def []=(io_addr : Int, value : UInt8) : Nil
-      return if io_addr >= 0xE0 # todo: OOB write
       channel = (io_addr - 0xB0) // 12
       reg = (io_addr - 0xB0) % 12
       case reg