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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To execute a program in extended memory it must first be copied to regular internal memory. Data inside extended memory is organized in files which can store programs or data.

Hp HPCX Manuals

This early HPC unit is equipped with golden ball-contacts for the external power supply. Interestingly, the “print stack” command is listed incorrectly as “PRST”.

Magnetic program card holder msnual 39 unmarked magnetic cards. Magnetic program card holder with 38 unmarked magnetic cards and one red card used to clean the magnetic head of the card reader.

These local labels are not visible outside of the current global program. The HPA quad memory module added registers giving a total of registers. Rather large with no other markings. The “flying goose” and the “backwards flying goose”.


This code-exchangability created a huge base of programs. Hp4c1x although it looks modern it is rather slow. Note that the printer A can power the HP A picture of the serial interface connector. One one side marked “”.

Apparently broke at some time because the enclosure is glued. One sheet of sticky labels for overlays, completely new. Up to four such modules could be added to reach a total of registers.

The graphics display of some of the Pioneer models is much better in this respect. Additional 75 Magnetic Cards. None powered from HP calculator. To enter this command press: Cardboard box with 6 rolls of paper for hp41x A or A printer.

This time I didn’t install manusl little spring which obstructed the card slot – now it works!! Note that two extension port covers have been marked with a black pen hardly noticable.

Replaced the rubber wheel – now it doesn’t work any more at all!

HP HP-41CX Manuals

Memory space is shared between programs and data storage, allocation is performed using the SIZE command. The following files are available on the Systemyde website: Various information on “synthetic programming”.


A HPCV with added extended memory, a built-in timer module and the extended functions module. Front and back close to mint, a few scratches on the sides. It is also one of the first calculators msnual support for alphanumeric strings – but in my opinion this makes the display hard to read.

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

A very popular calculator. I have a couple of CL myself, and it has happened that once per calculator so far. Register memory shared with program memory. Allowed for “synthetic programming” where machine code was accessible thru illegal commands.

One manuak overlay, one standard functions overlay both plastic. Both reader and manual in excellent condition.