diff --git a/src/crab/arm/block_data_transfer.cr b/src/crab/arm/block_data_transfer.cr
index b4e63e0..c26f212 100644
--- a/src/crab/arm/block_data_transfer.cr
+++ b/src/crab/arm/block_data_transfer.cr
@@ -19,7 +19,7 @@ module ARM
         end
       end
     else
-      16.times do |idx|
+      15.downto(0).each do |idx|
         if bit?(list, idx)
           address &+= add ? 4 : -4 if pre_index
           @gba.bus[address] = @r[idx]
diff --git a/src/crab/thumb/multiple_load_store.cr b/src/crab/thumb/multiple_load_store.cr
index 5657521..d347429 100644
--- a/src/crab/thumb/multiple_load_store.cr
+++ b/src/crab/thumb/multiple_load_store.cr
@@ -12,7 +12,7 @@ module THUMB
         end
       end
     else # stmia
-      8.times do |idx|
+      7.downto(0).each do |idx|
         if bit?(list, idx)
           @gba.bus[address] = @r[idx]
           address &+= 4