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Note: in all this document, HP-71B or 71 means the HP-71B machine.

Emu71 is a software emulator of the HP-71B machine.

Main features:

What's new

Emu71 documentation (pdf file)

Emu71 2.41 Freeware Package without ROM images

Emu71 uses ROM images of HP-71B ROM and modules (Math, Forth, ...).

To help you, you will find here the necessary images of the HP-71B machine, as well as the Forth and HP-IL modules. Although I don't have a formal authorization from the Hewlett-Packard company, I considered that this is consistent with the publication by HP of the source listings of these ROM. If it happens that the Hewlett-Packard company should be opposed to this, I would immediately remove these files from my site. Don't ask me to provide other HP or third party ROM images.

Emu71 now supports the PC serial COM ports, in order to allow downloading program files from Emu71 to an external HP-71B through the HP82164 HPIL/RS232 interface. This document gives some basic information: setup for PC / HP81264 link (pdf).

LIF archive files

LIF archives can be found on the Web. Somes examples are included here:

To use an archive, unpack it to put the LIF file image (size should be about 630K) to some directory, and declare the path to this file in HDRIVE1 or HDRIVE2 declaration (Emu71.ini file). Example: HDRIVE2 swap\jpc01.lif

You can find other archives, including the CHHU and SWAP collection, at The Museum of HP Calculators FTP

JPC ROM

The JPC ROM is a great HP-71B system enhancement. It was made by the former PPC-Paris Club and involved a number of active members (including myself).

To install JPC ROM into Emu71, just add a line in your emu71.ini file like: " 1 ROM 32 jpcromf.bin "

Refer to my JPC ROM page for more ROM images and documentation.

Symbolix

Symbolix is a large (20K) program written by J.K. Horn to do symbolic calculations on the HP-71B. Wlodek Mier-J. wrote about this program that "most users considered it faster and better than the symbolic operations of the contemporary HP-28C". And it's even faster and powerful in Emu71!

To install it in Emu71, just add a line in your emu71.ini file like: " 1 ROM 32 symbolix.bin "

Soft Forth

Soft Forth is a special version of the HP-71B Forth that runs in RAM and can be burned into standard (soft addressed) ROM or EPROM modules. The Forth ROM and a 64K RAM module (not 2x32K!) are needed for the development of a Soft Forth application. See also page 2.2 of the documentation a problem related with the HP-71B ROM 1BBBB.

 

Some links

General links about the HP-71B and other old HP calc.

Emulators and simulators of HP calculators

 

J-F Garnier, 2010