as/CMD/PUSH/pushpop.casl

   1 PUSHPOP START
   2         LAD     GR1,1
   3         LAD     GR2,2
   4         PUSH    0,GR1
   5         PUSH    0,GR2
   6         LAD     GR1,0
   7         LAD     GR2,0
   8         POP     GR2
   9         POP     GR1
  10         RET
  11         END