Disabling Operations

The five operations , /, -, () and

() disable stack lift. A number keyed in after one of these disabling operations writes over the number currently in the X–register. The Y–, Z– and T– registers remain unchanged.

In addition, when and act like CLx, they also disable stack lift.

The INPUT function disables stack lift as it halts a program for prompting (so any number then entered writes over the X-register), but it enables stack lift when the program resumes.

Neutral Operations

The following operations do not affect the status of stack lift:

DEG, RAD,

FIX, SCI,

DEC, HEX,

CLVARS

GRAD

ENG, ALL

OCT, BIN

 

PSE

SHOW

RADIX . RADIX , CLΣ

h and STOP

×and Ø * and *





 label nnn

(1)**

(2)**

 

 

EQN

FDISP

Errors

and program

 

 

 

entry

Switching binary

Digit entry

xiy rθ a

:

windows

 

 

 

Except when used like CLx.

 

 

Including all operations performed while the catalog is displayed except {} and {} , which enable stack lift.

User Memory and the Stack B-5