HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 93
HP HP12C - 12c Financial Calculator Manual
UPC - 882780792104
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Section 8: Programming Basics 93 Program line 07 contains the last instruction you keyed into program memory. However, if you press Ê again, you'll see that this is not the last line stored in program memory: Keystrokes Ê Display 08- 43, 33 00 Program line 08 As you should now be able to tell from the keycodes displayed, the instruction in program line 08 is gi00. The 00 Instruction and Program Line 00 Whenever you run the program now stored in program memory, the calculator executes the instruction in line 08 after executing the seven instructions you keyed in. This i00 instruction - as its name implies - tells the calculator to "go to" program line 00 and execute the instruction in that line. Although line 00 does not contain a regular instruction, it does contain a "hidden" instruction that tells the calculator to halt program execution. Thus, after each time the program is run, the calculator automatically goes to program line 00 and halts, ready for you to key in new data and run the program again. (The calculator is also automatically set to program line 00 when you press fs to set the calculator from Program mode to Run mode.) The i00 instruction was already stored in line 08 - in fact, in all program lines - before you keyed in the program. If no instructions have been keyed into program memory, if Continuous Memory is reset, or if fCLEARÎ is pressed (in Program mode), the instruction i00 is automatically stored in program lines 01 through 08. As you key each instruction into program memory, it replaces the i00 instruction in that program line. If your program should consist of exactly eight instructions, there would be no i00 instructions remaining at the end of program memory. Nevertheless, after such a program is executed the calculator automatically returns to program line 00 and halts, just as if there were a i00 instruction following the program. If you key in more than eight instructions, program memory automatically expands to accommodate the additional instructions. File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 93 of 209 Dimension: 14.8 cm x 21 cm