# echo.s:
# This file is the skeleton of Problem #2.
# It contains three pieces of code:  a "main program", starting at "__start",
# a procedure "getchar", and a procedure "print".  The main program is
# already written.  It sets up the stack, calls "getchar" to read a
# character from the terminal, calls "print" to print the character,
# then repeats the whole process over and over again.
# Add code from (fixed) buggy.print.s, then run by typing
#	spim -mapped_io -noexception echo.s

        .ktext 0x80000180

	.globl __start
__start:
        mtc0 $0, $12            # interrupts off
        lui $29, 0x8000
        lui $28, 0x1000
        ori $28, 0x8000
        addiu $29, $29, -4
loop:	jal getchar		# Read a character from terminal.
	sb $2,string		# Make a string containing the one character.
	sb $0,string+1
	la $4,string
	jal print		# Print out the input line.
	j loop

	.kdata

string:	.space 20		# Space to create a string containing
				# the input character.

	.ktext

getchar:
	# Your mission:  fill in the body of this procedure with code
	# to read a character from the terminal and return it as the
	# result.
	jr $31

print:
	# Copy the code you wrote for problem #1 of the assignment.
	jr $31