# echo.spim --- Read and echo a line from the console.  Demonstrates
#    syscalls for reading and writing strings.

            .data
line:       .space 80
prompt:     .asciiz "Enter a line to be echoed.\n"
nl:         .asciiz "\n"

            .text
            .globl main
main:       li $v0, 4         # Syscall code for print string.
            la $a0, prompt    # Starting address of string.
            syscall

            li $v0, 8         # Syscall code for read string.
            la $a0, line      # Starting address of buffer.
            li $a1, 80        # Length of buffer.
            syscall

            li $v0, 4
            la $a0, nl
            syscall

            li $v0, 4
            la $a0, line
            syscall

            li $v0, 10        # Syscall code for exit.
            syscall