HP 35s User Manual

 
 
hp calculators 
 
 
 
 
HP 35s  Programming using line numbers 
 
 
 
 
Programming the HP 35s 
 
Using line numbers rather than labels 
 
Example 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   

 
hp calculators 
 
HP 35s  Programming using line numbers 
 
hp calculators - 2 - HP 35s  Programming using line numbers - Version 1.0 
Programming the HP 35s 
 
Doing a simple calculation once on the HP 35s is easy. Doing the same calculation many times, or doing a complicated 
calculation, takes longer. It can be better to store all the steps needed for the calculation in a program. A program is a 
set of instructions, stored all together. Once it is written, it can be tested to see if it works...

 
hp calculators 
 
HP 35s  Programming using line numbers 
 
hp calculators - 3 - HP 35s  Programming using line numbers - Version 1.0 
In detail, the HP 35s handles changes in a program containing line number GTO and/or XEQ instructions as follows: 
 
Edit performed HP 35s program dynamically changed so that 
A step is inserted before a GTO or XEQ instruction All GTO and XEQ instructions are renumbered to point to 
 the revised (higher step number) location 
 
A step is deleted before a GTO or XEQ...

 
 
hp calculators 
 
 
 
 
HP 35s  Accessing the stack registers 
 
 
 
 
The stack registers 
 
Examples 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   

 
hp calculators 
 
HP 35s  Accessing the stack registers 
 
hp calculators - 2 - HP 35s  Accessing the stack registers - Version 1.0 
The stack registers 
 
The HP 35s uses an operational stack of four registers, called X, Y, Z and T and LASTx. In RPN mode, these registers 
are used to hold values for computations. In algebraic mode, these registers hold results from previous calculations. 
 
Chapter 2 of the HP 35s User’s Guide explains the RPN stack in detail. Many of these features work in algebraic...

 
hp calculators 
 
HP 35s  Accessing the stack registers 
 
hp calculators - 3 - HP 35s  Accessing the stack registers - Version 1.0 
#.) 
 
 Figure 5 
 
#.)  (REGX stands for “register X.”) 
 
 Figure 6 
  
)  (This completes the calculation) 
 
 Figure 7 
  
Answer:  The answer is 0.5. The larger point is the ability to reference up to four previous results when in algebraic 
mode. 
 
Example 2: In RPN mode within a program, fill the stack with 1, 2, 3, and 4. Then divide the 4 by (1+2x3), but do so...

 
hp calculators 
 
HP 35s  Accessing the stack registers 
 
hp calculators - 4 - HP 35s  Accessing the stack registers - Version 1.0 
 Figure 9 
  
# 
 
 Figure 10 
  
11) 
 
 Figure 11 
  
-4&(2* 
 
 Figure 12 
  
) 
 
 Figure 13 
  
Answer:  The lines entered into this program would, when executed, take the value that was originally in X and divide 
it by ( 1 + 2 x 3 ) without disturbing the stack. While this is actually a mixing of algebraic features within the 
RPN mode, it provides HP 35s users...

 
 
hp calculators 
 
 
 
 
HP 35s  Indirect register data packing program 
 
 
 
 
The HP 35s and indirect registers 
 
Saving program memory space 
 
Saving indirect storage space 
 
The program listing 
 
Usage instructions 
 
Entering program lines 
 
Line by line analysis of the program 
 
Saving keystrokes 
 
Usage examples 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   

 
hp calculators 
 
HP 35s  Indirect register data packing program 
 
hp calculators - 2 - HP 35s  Indirect register data packing program - Version 1.0 
 
 
The HP 35s and indirect registers 
 
The HP35s contains registers or variables that can be referenced directly or indirectly. Variables A through Z can be 
directly addressed, as in a !# instruction. Indirect addressing uses two of these direct variables as indices that 
hold the location or address where an operation is to be performed. The two...