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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Only one such module could be installed. About 70 magnetic cards for the magnetic card reader.

German, pages, Data inside extended memory is organized in files which can store programs or data. The “flying goose” and the “backwards flying goose”. Both reader and manual in excellent condition.

Allowed for “synthetic programming” where machine code was accessible thru illegal commands. These local labels are not visible outside of the current global program. And although it looks modern it is rather slow. No scratches on the back, keys feel a bit worn from extensive use, front dirty seems someone glued a keyboard overlay to the unit.


mamual A calculator with cult status. The remaining registers can be used for program code. Additional 75 Magnetic Cards. One sheet of sticky labels for overlays, completely new. Rather large with no other markings. A picture of the serial interface connector. Manial execute a program in extended memory it must first be copied to regular internal memory. B, Septemberprinted in Singapore. A unique feature was the barcode reader 41cz that allowed to read in programs that were printed on paper in the form of barcodes.

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Reportedly, HP never built this power supply but rather release a rechargeable battery pack that had the connector built-in.

Cardboard box with 6 rolls of paper for the A or A printer. Did not put back the label which covers the screws. You can enter a program that starts with a local label. Note that the printer A can power the HP Register memory shared with program memory. One register can hold up to 7 program steps 7 bytes. One blank overlay, one standard functions overlay both plastic. Especially the possibility 41cc access ROM code made it the preferred toy for “hackers”.

The graphics display of some of the Pioneer models is much better in this respect. Program “ST” speed test is the core speed test program. Also, HP provided a respectable number of software packages as well as ROM modules with pre-programmed solutions. The HPA quad memory module added registers giving a total of registers. I have a couple of CL mankal, and it has happened that once per calculator so far.

Delivers highly accurate results!


manusl Refer to the table on the back of the calculator for special keys ie. This code-exchangability created a huge base of programs. Also, it is not possible to use “CLP” to delete the memory occupied by the program!


One with standard key symbols, one with no labels. Up to four such modules could be added to reach a total of registers. Replaced the rubber wheel – now it doesn’t work any more at all! Apparently broke at some time because the enclosure is glued.

Unfortunately, my cleaning efforts made things even worse not visible on the picture. Front and back close to mint, a few scratches on the sides. 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.

The HPA memory module added 64 registers.

Labels and mutli-character string labels. Various information on “synthetic programming”. White keyboard overlay with normal function codes. Magnetic program card holder with 38 unmarked magnetic cards and one red card used to clean the magnetic head of the card reader.

Math 1 ROM module, part no. The HPA “X-memory” module increased the extended memory space by registers bytes.

Type, Precision, Input Mode. This early HPC unit is equipped with golden ball-contacts for the external power supply. Older units will be completely reset, newer units perform a “soft reset”.