HP HP-41CV Manuals

HP-41CV HP-41CV Quick Reference  A. Thimet Overview ← RUN mode: Clear last entered digit ot entire X-register PRGM mode: Delete currently displayed program instruction USER Turn user mode on/off. In user mode, every key can possibly be programmed to perform some specific internal or programmed function. See the ASN command. PRGM Turn programming mode on/off. Use „GTO ..“ to pack program memory and jump to the beginning of unused space. In PRGM mode „00 REG nn“ will be displayed where nn is the number of available registers for program data. ALPHA Turn ALPHA (string entry) mode on/off. On the back of the calculator is a list of charcters that can be reached by the yellow prefix key. Memory 319 registers. Initially 46 registers are program space and 273 registers are available for variable storage. One register can approximately hold 6 program steps, so initially there are 276 program steps available. When the number of storage registers is reduced to 10 using „SIZE 010“ then 309 registers are available for programs corresponding to 1854 program instructions. Available functions Use the CAT command to get a list of internal and external functions. Use XEQ ALPHA ALPHA to execute a command which is not directly available on the keyboard. Use the same sequence to enter such commands in a program! Indirect addressing See RCL command Command Reference + Add Y + X → X - Subtract Y – X → X x Multiply Y * X → X / Divide Y / X → X 1/x Reciprocal value 10↑x Exponential function base 10 ABS Absolute (positive) value of X ACOS Inverse Cosine using current trigonometry mode AOFF ALPHA mode off AON ALPHA modem on. Using the SHIFT key various special keys and functions can be accessed. See on the back of the calculator. The ALPHA register can hold up to 24 characters. PRGM mode: A program line can only hold at most 15 characters. To put a longer string into the ALPHA register use two program lines and start the second one with “SHIFT K” which is the APPEND command 1