start by moving positioned(module) to position(class)

test/arm/test_call.rb

@@ -18,9 +18,9 @@ module Arm
     def test_method_call
       Risc.machine.boot
       bin = Parfait::BinaryCode.new(1)
-      Positioned.set_position(bin , 0x20)
+      Risc::Position.set_position(bin , 0x20)
       code = @machine.call(	bin ,{} )#this jumps to the next instruction
-      Positioned.set_position(code , 0)
+      Risc::Position.set_position(code , 0)
       assert_code code , :call, [0x09,0x0,0x0,0xeb]
     end
     def test_swi

test/arm/test_move.rb

@@ -22,7 +22,7 @@ module Arm
     end
     def test_mov_big
       code = @machine.mov  :r0,  0x222  # is not 8 bit and can't be rotated by the arm system in one instruction
-      code.set_position(0)
+      code.set_position(0,0)
       begin  # mov 512(0x200) = e3 a0 0c 02    add 34(0x22) = e2 90 00 22
         assert_code code , :mov , [ 0x02,0x0c,0xb0,0xe3]
       rescue Risc::LinkException