Some Material Related to Historic Hewlett Packard Calculators and Computers

Most of the now classic Hewlett Packard pocket calculators and mini computers were technically advanced devices. In the 1970s and 1980s they were very popular among students, scientists, engineers and technically minded people. While not cheap, they combined excellent technology and high manufacturing quality with robust design.

This and the linked pages contain some bits of information which I have collected and also made available via the larger web sites dealing with HP calculators.

It is not my intention to start another site about HP computers. You can find sites with an exhaustive wealth of information easily on the web by searching for terms like "HP Museum" etc. Some of them also offer CDs and DVDs with collected material which are highly recommended.


 

German Literature for Hewlett Packard 41/71/80 Computers

Here, you can find a complete collection of the nine books in PDF format published by the Heldermann Verlag in the 1980s.
Note that the books are in German.

 

Deutsche Literatur für Hewlett Packard 41/71/80 Rechner

Hier finden Sie eine vollständige Sammlung der neun Bücher, die vom Heldermann Verlag in den 1980er Jahren veröffentlicht wurden.
Diese Bücher liegen in deutscher Sprache vor.

 


Some Write-ups from my Digital Scrapbook

(short PDF documents)

Making Your Own HP-IL Cable

Repairing a broken key on the HP 12C Platinum Calculator

HP Flexible Disk Formats

Using the HxC Floppy Emulator with HP Systems

The GET and LET functions in the Solver on HP Calculators

Plotting Curves at Constant Speed

Repairing a ThinkJet Printer's Ribbon Cable

Repairing a Transtec TT401 RS232 Terminal

Some TrueType fonts mimicking HP-71, 75, 85, 86/87 screen fonts

The HP-IB "SnifTer" Debugging and Display Tool for HP-IB


Some of my own Quick Reference Cards

(written for my own purposes)

print out and fold or laminate.

HP-Systems

HP-IB Devices

HP-IL Devices


Building a "Red Eye" receiver

Arduino Source Code

Explains how to build your own receiver to capture the print output of HP pocket calculators.


Reader Software Application for HP-41 Barcodes

Java software to read scanned barcodes and convert them or print program listings.


  Some Bits and Pieces for Sale

On this page I offer some difficult to obtain parts and accessories for HP-calculators and HP-computers. Note that this an offer for fellow enthusiasts and no commercial undertaking.


   Epson HX-20 and PX-8 related Information

I wrote down my experience with the HX-20 and PX-8 systems.

For these computers I also wrote a screen and disk drive simulator program which allows using a PC to connect to the HX-20 and to use the large screen of the PC for editing programs and outputting graphics.

In case of the PX-8 the simulator allows disk drive simulation and with the help of some BIOS extensions to send graphics and text to the screen.

GSX-80  for CP/M 2.2

GSX-80 Drivers for CP/M 2.2

GSX was a device independent interface for text and graphics. While it became very popular in its GDOS/VDI implementation in GEM (especially for the Atari ST) it never caught on under CP/M-80.
I wrote a few drivers for my own purposes, which are made available here in from of compiled driver files as well as source code.

This document describes these drivers and lists properties of most of the existing GSX drivers for CP/M 2.2.

Additionally I wrote two libraries to use GSX with Fortran as well as some application programs

  • GLIB and GSXLIB libraries for Fortran
  • GPLOT plot program in Fortran, uses GLIB and GSXLIB
  • GEMVIEW Metafile viewer in Turbo Pascal

Tektronix Graphics

A Tektronix Library for Fortran under CP/M 2.2

Tektronix used their storage tube technology to develop vector graphics terminals. These were very popular in the 1980s and you can find software terminal emulators (e.g. Teraterm, Xterm) as well as firmware implementations (e.g. on Raspberry Pi) of the protocol.

Before discovering GSX-80 I wrote a library for Tektronix output on CP/M 2.2. The library was developed with Microsoft Fortran 3.44 and offers a core set of easy to use functions. It should be portable to other implementations of Fortran.


Impressum                 Datenschutzerklärung

Durch die Nutzung meiner web site erklären Sie sich mit der Erhebung, Verarbeitung und Nutzung von Daten gemäß der nachfolgenden Beschreibung einverstanden.

Meine Website kann grundsätzlich ohne Registrierung besucht werden. Dabei werden Daten wie beispielsweise aufgerufene Seiten bzw. Namen der abgerufenen Datei, Datum und Uhrzeit zu statistischen Zwecken auf dem Server gespeichert, ohne dass diese Daten unmittelbar auf Ihre Person bezogen werden. Personenbezogene Daten, insbesondere Name, Adresse oder E-Mail-Adresse werden nicht erhoben. Ohne Ihre Einwilligung erfolgt keine Weitergabe von Daten an Dritte.