Section 11
Multiple Programs
You can store multiple programs in program memory, provided that you separate them by instructions that will halt program execution after each program is run and return to the beginning of the program if it is run again. You can run programs after the first one stored in program memory by setting the calculator to the first line of the program using i before pressing t.
Storing Another Program
To store a program after another program is already stored in program memory:
1. Press fs to set the calculator to Program mode. Do not clear program memory.
2. Press gi. followed by two digits that specify the number of the last line you keyed into program memory.
Note:
If this is the second program to be stored in program memory, you will need to ensure that a i00 instruction separates it from the first program by doing step 3. If there are already two or more programs stored in program memory, skip step 3 and proceed with step 4.
3. Press gi00. This automatically converts a data storage register into seven additional lines of program memory (if there was not already a i00 instruction remaining at the end of program memory), and it ensures that program execution will branch to line 00 after the first program is run.
4. Key the program into program memory. If you are storing a program that you originally had written to be stored at the beginning of program memory and the program contains a i instruction, be sure to change the line number specified in the instruction so that the program will branch to the actual new line number.
Note:
The next two steps are included so that program execution will halt after this program is run and will return to the beginning of the program if it is run again. If the program ends with a loop, you should skip steps 5 and 6 since the instructions in those steps would serve no purpose and never be executed.
5. Press t. This halts program execution at the end of the program.
6. Press gi followed by two digit keys that specify the first line number of your new program. This transfers program execution to the beginning of the new program when the program is run again.
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Section 11: Multiple Programs 121
Example 1: Assuming that program memory still contains the last program from the preceding section (which consisted of 17 program lines), store after that program the office-supplies program from Section 8 (page 88). Since this is the second program to be stored in program memory, we’ll ensure that a i00 instruction separates it from the first program by doing step 3 in the procedure above. Furthermore, since this program does not end with a loop, we’ll do steps 5 and 6 too.
Keystrokes Display fs gi.17 gi00
00-
Sets calculator to Program mode.
17- 43, 33 02
Sets calculator to last line keyed into program memory.
18- 43, 33 00
Ensures that second program is separated from first by i00.
\
2
5 b
-
5
+ t gi19 fs
27- 43, 33 19
12,000.00
Keys in program.
Branches to beginning of program.
Sets calculator back to Run mode.
(Display shown assumes results remain from running program in previous example.)
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Printered Date: 2005/7/29
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