wram_chunk_loop:
   ldr r8,=0x400404c                                     @\
   add r8,r10                                            @ memorize old mapping
   ldrb r9,[r8]  @memorize old                           @ and map to ARM9
   mov r0,#0x80                                          @
   strb r0,[r8]  @map as 1st arm9 slot                   @/
   mov r1,#0x3000000                                     @\
   ldr r0,[nop]                                          @

  fill_loop:                                             @ fill chunk with NOPs
   str r0,[r1],#4                                        @
   tst r1,#0x8000                                        @
   beq fill_loop                                         @/
   ldr r4,=ldr_bx_dd_arm7_re_entry                       @\
   ldmia r4!,{r0-r3}                                     @ cast hook at chunk end
   ldr r4,=0x3007ff0                                     @
   stmia r4!,{r0-r3}                                     @/
   strb r9,[r8]  @restore old                            @-map back to ARM7
   sub r10,#1                                            @\
   and r10,#7                                            @ next chunk
   cmp r10,#6                                            @
   bne wram_chunk_loop                                   @/
   bx  lr