401dbb04: 90 00 20 00 rcsr r4,IE
401dbb08: 20 83 ff fe andi r3,r4,0xfffe
401dbb0c: d0 03 00 00 wcsr IE,r3
401dbb10: 20 84 00 01 andi r4,r4,0x1
401dbb14: 28 23 00 00 lw r3,(r1+0)
401dbb18: 34 63 ff ff addi r3,r3,-1
401dbb1c: 58 23 00 00 sw (r1+0),r3
401dbb20: 20 84 00 01 andi r4,r4,0x1
401dbb24: 90 00 10 00 rcsr r2,IE
401dbb28: 20 42 ff fe andi r2,r2,0xfffe
401dbb2c: b8 44 10 00 or r2,r2,r4
401dbb30: d0 02 00 00 wcsr IE,r2
401dbb04: 90 00 20 00 rcsr r4,IE
401dbb08: 20 83 ff fe andi r3,r4,0xfffe
401dbb0c: d0 03 00 00 wcsr IE,r3
401dbb14: 28 23 00 00 lw r3,(r1+0)
401dbb18: 34 63 ff ff addi r3,r3,-1
401dbb1c: 58 23 00 00 sw (r1+0),r3
401dbb30: d0 02 00 00 wcsr IE,r4