Not Just Manuals (for not just programmables)

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• Miscellaneous Documents

Useful Information

• Where Can I Get a Manual, and other Frequently Asked Questions
• Calculator Links
• An Important Note to dealers or sellers of vintage calculators
• Calculator Buyers' Guide by Ron Ross (last updated April 7, 2010)

Book Reviews

• RCL 20 by W. A. C. Mier-Jedrzejowicz Ph. D. & Frank Wales
• Programmierbare Taschenrechner selbst gebaut by Martin Kompis

Technical Notes

First, a disclaimer: beware of programmers who carry screwdrivers. I am a software guy. Although I know how to handle a soldering iron and have some burn marks on my hands to prove that I am no novice, my expertise lies mainly in programming computers, not building or fixing them. Take this into account when you read the articles below.

• A small (but growing) Knowledge Base
• Disassembly Instructions for Selected Models
• Battery Pack Repair
• Notes on Corrosion
• Repairing HP-67 Card Readers by Mike Davis
• Repairing HP-97 Card Readers by Mike Davis
• Repairing the Broken Screwposts of an HP-41C by Laurent Fournier

Articles

• A Question of Definitions
• A Brief History of Programmable Calculators
• The Evolution of the Programmable Calculator
• Calculator Programming
• Why the Madness? A Personal Perspective

• Hidden Opcodes on the TI-55 by Claus Buchholz
• Conditional Branching with the TI-MBA by Claus Buchholz
• The TI-57 Memory Map by Claus Buchholz
• TI-57 Constant ROM by Claus Buchholz

accesses to these Web pages since May 15, 2000.