The HPC/41CV Alphanumeric Full Performance. Programmable Calculator. Owner’s Handbook and. Programming Guide. September HPCX Owner’s Manual Vol – Ebook download as PDF File .pdf) or read book online. 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.

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Large battery pack or external power supply.

HP -41CX Quick Reference Manual

Additional 75 Magnetic Cards. One one side marked “”. B, Septemberprinted in Singapore.

The HPA “X-memory” module increased the extended memory space by registers bytes. Register memory shared with program memory.


A very popular calculator. Older units will be completely reset, newer units perform a “soft reset”. One sheet of sticky labels for overlays, 41cc new. Original HPC cardboard box in good condition. Mint out of the box, everything like new except the cardboard box.

Front and back close to mint, a few scratches on the sides. Data inside extended memory is organized in files which can store programs or data. Only one such module could be installed. No scratches on the back, keys feel a bit worn from extensive use, front dirty seems someone glued a keyboard overlay to the unit.

The “flying goose” and the “backwards flying goose”. Specifies the amount of number registers nnn to allocate.

Solved: HPCX manuals – HP Support Community –

Allowed for “synthetic programming” where machine maunal was accessible thru illegal commands. Also, HP provided a respectable number of software packages as well as ROM modules with pre-programmed solutions.

A picture of the serial interface connector. Unfortunately, my cleaning efforts made things even worse not visible on the picture. Apparently, only two such modules could be installed.

These local labels are not visible outside of the current global program. The HPA memory module added 64 registers.

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: German, pages, Rather large with no other markings. One register can hold up to 7 program steps 7 bytes.

Rather, indirect access must be used. Especially the possibility to access ROM code made it the preferred toy for “hackers”. Note that two extension port covers have been marked with a black pen hardly noticable.

Various information on “synthetic programming”. Also, it is not possible to use “CLP” to delete the memory occupied by the program! Without most of the keyboard labels, to be used with keyboard overlays. Apparently broke at some time because the enclosure is glued. You can enter a program that starts with a local label.

To enter this command press: A calculator with cult status. To execute a program in extended memory it must first be copied to regular internal memory. Cardboard box with 6 rolls of paper for the A or A printer.

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

I have a couple of CL myself, and it has happened that once per calculator so far. Within a program local labelsA – J and a – j can be used. Math 1 ROM module, part no. Labels and mutli-character string labels.