HP-41 questions

[x34]

In the programs http://www.hpmuseum.org/software/41/41roman.htm there are numerous instructions "DSE X", I am unable to enter it on my CX. Is "X" here a "synthetic" register, so may I replace it with any numeric one?

Is it possible to enter function name into program from Catalogue directly?

tia

[Jackie Woldering]

Try the following 8 keystrokes: XEQ ALPHA D S E ALPHA . X

[Dieter]

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Is "X" here a "synthetic" register, so may I replace it with any numeric one?

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No. X, Y, Z and T (and also L = LastX, for that matter) simply are the usual stack registers. Yes, the '41 can also use the stack for commands like DSE, ISG, STO, RCL, X<>, VIEW and others. It is not limited to the regular numbered standard registers.

If you use these commands, the stack registers can be addressed by pressing the decimal point [.] before X, Y, Z, T or L. At this point, the '41 shows a "ST" to indicate that you are about to use a STack register.

  [XEQ] [ALPHA] D S E [ALPHA]

        =>   DSE _ _

  [.]

        =>   DSE ST _

   X

        =>   DSE X      ; as usual, the X is on the "6" key

Quote:

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Is it possible to enter function name into program from Catalogue directly?

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No. At least not with a standard '41.

Dieter

[Raymond Del Tondo]

Quote:

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Is it possible to enter function name into program from Catalogue directly?

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Yes, it you have a W&W CCD module installed, or alternatively the CCD OS/X ROM block in an active page of a RAM box.

HTH

Ray

[x34]

Thank you!