进行了一些搜索，但还没有找到确切的答案。我正在尝试以汇编语言（Mars 4.5 IDE）在MMIO仿真器上显示文本字符串。因此，在代码中，我要求用户输入一个字符串，然后跳转到一个函数，该函数将访问相应的寄存器以实现此目的。到目前为止，这是我的代码
.data
# Do an inputted string text.
input1: .asciiz "Please enter a string: "
# Make enough space for the array.
array1: .space 101
# Resulting string.
output1 :.asciiz "\nInputted string from MMIO: "
.text
# Display the first input and the resulting string.
li $v0, 4
la $a0, input1
syscall
li $v0, 8
la $a0, array1
la $a1, 101
syscall
# Move the address of the first element in a temporary register.
la $t0, ($a0)
# Now store some items on the stack.
addiu $sp, $sp, -12
sw $ra, ($sp)
sw $t0, 4($sp)
# Then call the function to print that output back using a mock syscall
jal print_line
# Restore whats on the stack.
lw $ra, ($sp)
lw $t0, 4($sp)
addiu $sp, $sp, 12
# Terminate the program.
li $v0, 10
syscall
# Define the key_getter function.
print_line:
# Now load some stuff from the stack into this area.
lw $a1, 4($sp)
# Then gather the hard coded memory address of the display terminal
li $a2, 0xffff0000
# At this point, $a1 holds the memory address of the first element in the string.
# And $a2 holds the memory address of the display register for the MMIO.
loop:
#####
display_not_ready:
# Load the word from our display terminal with an offset of 8.
lw $t0, 8($a2)
# Then isolate the bit at the very end.
andi $t0, $t0, 1
# This means if the bit is 1, then the display is ready, if not branch
# until it is ready.
beqz $t0, loop
# Check it the 12th offset is a new line if it is branch to done.
lw $t1, 12($a2)
beq $t1, 10, done
# If we've reached this far then there is a character ready to print.
sw $t1, 12($a2)
# Move to the next character in the array.
addi $a1, $a1, 1
# Then branch back up to loop.
b loop
# Have our done ready.
done:
jr $ra
问题：每当我汇编代码并输入字符串时，我的程序都会陷入无限循环，围绕“ display_not_ready”的内存地址和beqz $ t0循环。
它永远不会在显示字段中将字符串显示给MMIO模拟器。
注意：在阅读了本网站上的一些答案后，是的，我始终确保已激活“连接到mips”按钮。这不是问题。