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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A HPCV with added extended memory, a built-in timer module and the extended functions module. Type, Precision, Input Mode. Delivers highly accurate results! Various information on “synthetic programming”. Up to four such modules hp441cx be added to reach a total of registers.

White hp411cx overlay with normal function codes. The “flying goose” and the “backwards flying goose”. Sheet of small adhesive labels with programming functions. One with standard key symbols, one with no labels. Excellent condition, fully functional.

About 70 magnetic cards for the magnetic card reader. Register memory shared with program memory. A picture of the serial interface connector. This code-exchangability created a huge base of programs. Mint out of the box, everything like new except the cardboard box.


Interestingly, the “print stack” command is listed incorrectly as “PRST”. The graphics display of some of the Pioneer models is much better in this respect. B, Septemberprinted in Singapore. I have a couple of CL myself, and it has happened that once per calculator so far.

One manuual of sticky labels for overlays, completely new. Rather, indirect access must be used. To execute a program in extended memory hp1cx must first be copied to regular internal memory. The remaining registers can be used for program code. One blank overlay, one standard functions overlay both plastic. German, pages, 1st issue, Memory space is shared between programs and data storage, allocation is performed using the SIZE command.

Also, it is not possible to use “CLP” to delete the memory occupied by the program!

HP -41CX Quick Reference Manual

One one side manuaal “”. This early HPC unit is equipped with golden ball-contacts for the external power supply. Replaced the rubber wheel – now it doesn’t work any more at all!

Note that two extension port covers have been marked with a black pen hardly noticable. Apparently, only two such modules could be installed. Without most of the keyboard labels, to be used with keyboard h4p1cx. Magnetic program card holder with 39 unmarked magnetic cards. After the listing has been stopped when this “END” is displayed switching to PRGM mode will display the program and it is possible to delete it step-by-step to reclaim program memory. Only one such module could be installed.


A calculator with cult status.

Additional 75 Magnetic Cards. The HPA quad memory module added registers giving a total of registers. All keys could be re-assigned to user-defined commands.

Original HPC cardboard box in good condition. To enter this command press: Especially the possibility to access ROM code made it the preferred toy for “hackers”.


Large battery pack or external power supply. Note that the printer A can power the HP None powered from HP calculator. Rather large with no other markings. For plain string input do not use XEQ. Front and back close to mint, a few scratches on the sides.