Complete Program

# threenodeList.asm
#
        .text
        .globl  main

main:    
        # create the first node 
        li      $v0,9             # allocate memory
        li      $a0,8             # 8 bytes
        syscall                   # $v0 <-- address
        move    $s1,$v0           # $s1 = &(first node)
        
        # copy the pointer to first
        sw      $s1,first
        
        # initialize the first node
        li      $t0,1             # store 1
        sw      $t0,0($s1)        # at displacement 0

        # create the second node 
        li      $v0,9             # allocate memory
        li      $a0,8             # 8 bytes
        syscall                   # $v0 <-- address
        
        # link the second node to the first
        sw      $v0,4($s1)        # copy address of second node
                                  # into the first node
        
        # make the new node the current node
        move    $s1,$v0           # $s1 = &(second node)

        # initialize the second node
        li      $t0,2             # store 2
        sw      $t0,0($s1)        # at displacement 0

        # create the third node 
        li      $v0,9             # allocate memory
        li      $a0,8             # 8 bytes
        syscall                   # $v0<-- address
        
        # link the third node to the second
        sw      $v0,4($s1)        # copy address of third node
                                  # into the second node
        
        # make the new node the current node
        move    $s1,$v0           # $s1 = &(third node)

        # initialize the third node
        li      $t0,3             # store 3
        sw      $t0,0($s1)        # at displacement 0

        # end the list
        sw      $0,4($s1)         # put null in the link field
                                             
        li      $v0,10            # return to OS
        syscall       

        .data
first:  .word   0