|Re: Programming a HP41CX|
Message #5 Posted by Dan Grelinger on 28 Aug 2008, 6:55 p.m.,
in response to message #1 by Bill Lafferty
1. As Garth said first, the HP41CX already has the Extended Functions module (and more) built in. Do not plug a separate one into the calculator.
2. This is a clarification of what Garth said about entering module functions when the module is not installed: It is best to enter the module function into a program when the module is installed. It will be entered in a manner that is very efficient to store and execute. The only downside is if the module is removed, it becomes more difficult to know what function is called, because the name dissappears and is replaced by something like XROM 21,02. But, you can enter in a function such as READP into a program, when the HP-IL module is not installed, and once you install the module, it will execute. The downside is it takes more memory to store the function in the program, and it executes slower.
3. As Hakan mentioned, the calculator beeping when a program is read in from tape, disk or magnetic card storage is an indication that it was recorded with the Auto-Execution flag (flag 11) set. If a program is saved whith Flag 11 set, the HP-41 will beep and begin execution when it is read back in. And yes, it works the same with HP-IL tape and disk storage as with mag cards.