The HPCX was the same as the HPCV but added the Time module The phonebook-sized manual dwarfed the calculator, let alone the tiny ROM. View and Download HP CX quick reference manual online. HPCX Calculator pdf manual download. Hp HPCX Pdf User Manuals. View online or download Hp HPCX Service Manual, Quick Reference Manual.

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Infrared module HPA, serial number Interestingly, the “print stack” command is listed incorrectly as “PRST”. Rather, indirect access must be used. One register can hold up to 7 ph41cx steps 7 bytes. One one side marked “”.

Hewlett Packard HP-41C/CV/CX/CL

A unique feature was the barcode reader “wand” that allowed to read in programs that were printed on paper in the form of barcodes. Front and back close to mint, a few scratches on the sides. Magnetic program card holder with 39 unmarked magnetic cards.

Various information on “synthetic programming”. Without most of the keyboard labels, to be used with keyboard overlays. Note that two extension port covers have been marked with a black pen hardly noticable.


Allowed for “synthetic programming” where machine code was accessible thru illegal commands.

Solved: HPCX manuals – HP Support Community –

To enter this command press: Large battery pack or external power supply. White keyboard overlay with normal function codes. Only one such module could be installed. Also, it is not possible to use “CLP” to delete the memory occupied by the program! This time I didn’t install a little spring mahual obstructed the card slot – now it works!!

HP HP-41CX Manuals

Mint out of the box, everything like new except the cardboard box. All keys could be re-assigned to user-defined commands.

It is also one of the first calculators with support for alphanumeric strings – but in my opinion this makes the display hard to read. Math 1 ROM module, part no. Apparently broke at some time because the enclosure is glued. Specifies the amount of number registers nnn to allocate.

No scratches on the back, keys feel a bit worn from extensive use, front dirty seems someone glued a keyboard overlay to the unit. One blank overlay, one standard functions overlay both plastic. You can enter a program that starts with a local label. Register memory hp41cs with program memory. Note that the printer A can up41cx the HP About 70 magnetic cards for the magnetic card reader.


A calculator with cult status.

This code-exchangability created a huge base of programs. Sheet of small adhesive labels with programming functions. German, up41cx, None powered from HP calculator. Especially the possibility to access ROM code made it the preferred toy for “hackers”. I have a couple of CL myself, and it has happened that once per calculator so far.

And although it looks modern it is rather slow.