- STACK MANIPULATION FUNCTIONS 
STACK MANIPULATION FUNCTIONS

Stack Manipulation Functions.

ENTER. Pressing ENTER separates two numbers keyed in one after another. It does so by lifting the stack and copying the number in the display (X-register) into the Y-register. The next number entered then writes over the value in the X-register; there is no stack lift. The example below shows what happens as the stack is filled with the numbers 1, 2, 3, 4.

 	    |----------> lost |--------> lost
 T	t--| |-------->   z--| |------>  y
 Z	z----| |------>   y----| |---->  x
 Y	y------| |---->   x------| |-->  1
 X	x--------| |-->   1--------|-->  1
              |
Keys:         1           ENTER

 	                      |--------> lost
 T	y------------->   y--| |------>  x
 Z	x------------->   x----| |---->  1
 Y	1------------->   1------| |-->  2
 X	1          |-->   2--------|-->  2
              |
Keys:         2           ENTER

                        |--------> lost
 T	x------------->   x--| |------>  1
 Z	1------------->   1----| |---->  2
 Y	2------------->   2------| |-->  3
 X	2          |-->   3--------|-->  3
              |
Keys:         3           ENTER


 T	1------------->   1
 Z	2------------->   2
 Y	3------------->   3
 X	3          |-->   4
              |
Keys:         4

See "CALCULATOR FUNCTIONS AND THE STACK", this help.