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| .text
mtc0 $0, $12
ori $at, $0, 0xfffc
#====OV=====
lui $t0, 0x7fff
lui $t1, 0xffff
add $t2, $t0, $t1
sub $t2, $t0, $t1
sub $t2, $t1, $t0
lui $t1, 0x7fff
add $t2, $t0, $t1
ori $t1, $t1, 0xffff
addi $t2, $t1, 0xfffffff0
addi $t1, $t1, 0x0010
#=====SYSCALL=====
syscall
#=====ADEL=====
lui $t1, 0x7fff
jal label1
add $ra, $ra, $t1
label1:
jr $ra
nop
jal label2
addi $ra, $ra, 1
label2:
jr $ra
nop
ori $t0, $0, 0x7f00
ori $t2, $0, 0x7f20
sw $t0, 0($0)
lw $t0, 0($0)
lw $t0, 1($0)
lw $t0, 2($0)
lh $t0, 3($0)
lh $t0, 0($t0)
lh $t0, 2($t0)
lb $t0, 0($t0)
lb $t0, 3($t0)
loop_timer1:
lw $t1, 0($t0)
addi $t0, $t0, 4
bne $t0, $t2, loop_timer1
nop
ori $t0, $0, 0x3000
lw $t0, 0($t0)
lui $t0, 0x7fff
ori $t0, $t0, 0xffff
lw $t0, 1($t0)
lw $t0, -4($0)
#=====ADES=====
sw $0, 1($0)
sw $0, 2($0)
sh $0, 3($0)
sw $0, 4($0)
sh $0, 6($0)
sb $0, 7($0)
ori $t0, $0, 0x7f00
sh $0, 0($t0)
sh $0, 2($t0)
sb $0, 0($t0)
sb $0, 3($t0)
ori $t1, $0, 0x7f30
loop_timer2:
sw $0, 0($t0)
addi $t0, $t0, 4
bne $t0, $t1, loop_timer2
nop
ori $t0, $0, 0x3000
sw $0, 0($t0)
lui $t0, 0x7fff
ori $t0, $t0, 0xffff
sw $0, 1($t0)
sw $0, -1($0)
#=====ALTOGETHER=====
lui $t0, 0x7fff
ori $t1, $t0, 0xffff
sw $0, 0($t0)
addi $t1, $t1, 1
syscall
sw $0, 0($t0)
addi $t1, $t1, 1
nop
sw $0, 0($t0)
addi $t1, $t1, 0
syscall
sw $0, 0($0)
addi $t1, $t1, 1
syscall
lui $t0, 0x8000
addi $t1, $t1, 1
beq $t0, $t1, end
nop
end:
beq $0, $0, end
nop
.ktext 0x4180
_main_handler:
mfc0 $k0, $13
mfc0 $k0, $14
and $k0, $k0, $at
addi $k0, $k0, 4
mtc0 $k0, $14
sb $0, 0x7f20($0)
eret
|
