hpcalc.org - HP 28 Archive

HP 28 Documentation Files

The first size listed is the downloaded file size and the second size listed is the size on the calculator.

There are 17 files totaling 11477KB in this category.

Battery Drain Table #2   (details) 48 28 ENG   2KB
Compares battery usage of the HP 48 and HP 28.
By Simone Rapisarda. 1997/08/21

Calculator Command Comparison Sheet 2.00   (details) 49/50 48 28 ENG   279KB
A command comparison sheet of HP symbolic RPN calculators, containing a description of every command. Covers the HP 28C, 28S, 48S/SX, 48G/G+/GX, and 49G/48gII/49g+. The sheet is color coded based on the model for easy reading. In Excel format but also compatible with OpenOffice and Pocket Excel.
By Veli-Pekka Nousiainen. 2005/05/24

Calculator Comparison 5   (details) 49/50 48 28 ENG   5KB
Compares the HP 49 with the 48GX, 48G+, 48G, 48SX, 48S, 28S, and 28C.
By Veli-Pekka Nousiainen. 2000/09/21

Customize Your HP-28 Information   (details) 28 ENG   3KB
Information on the book "Customize Your HP-28."
By Wlodek Mier-Jedrzejowicz. 1998/07/31

Graphics for the HP 28S   (details) 28 ENG   48KB
Explains all about creating and manipulating graphics on the HP 28S.
By Brian Maguire. 1998/07/31

How to add an RS-232 Port to the HP 28   (details) 28 ENG   14KB
Explains how to add an RS-232 port to the HP 28.
By Joris Ballet. 1997/09/06

HP 28 Power Consumption Statistics   (details) 28 ENG   12KB
Information about the power consumption of the HP 28, including information on power consumption versus CPU speed.
By Robert Peraino and Scott Hutchinson. 1998/07/31

HP 28 Setup   (details) 28 ENG   15KB
One person's setup of his HP 28 memory.
By Eric L. Hernes. 1998/07/31

HP 28S Processor Notes   (details) 28 ENG   14KB
A four-part document that gives some information about the Saturn processor architecture in the 28S, listing the entire instruction set, including the opcodes and the "AG" mnemonics for them, along with some sample assembly language code written in "AG" mnemonics. Also explains how to enter machine code onto the 28S, and then how to make it into a runnable program, using SYSEVAL commands.
By Alonzo Gariepy. 2017/08/08

HP 28S Proprietary Opcodes   (details) 28 ENG   24KB
Addendum to the HP 28S Processor Notes, listing the official HP mnemonics.
By Alonzo Gariepy. 1998/07/31

HP 28S vs. HP 41   (details) 28 ENG   5KB
Comparison of the HP 28S versus the HP 41.
By Mark Simms. 1998/07/31

HP Calc Command Comparison   (details) 48 28 ENG   18KB
Comparison of the HP 75C, 71B, 28S, 42S, and 48SX commands in MS Works spreadsheet format.
Author unknown. 1998/04/18

HP-28COM Review   (details) 28 ENG   11KB
Review on the HP-28COM, an RS-232 port for the HP 28S.
By Mogens Jallberg. 1998/07/31

IR Data   (details) 28 ENG   3KB
Information about the IR LED.
By Chuck. 1998/07/31

IR28   (details) 28 ENG   7KB
Information about the infrared port on the HP 28.
By Eric Toonen. 1998/07/31

Opening the HP 28   (details) 28 ENG   6503KB
Shows how to open the HP 28 with minimal damage. In HTML format with detailed photos.
By Wanderley Navarro. 2017/07/31

Voyage au Centre de la HP 28C/S   (details) 28 FRA   4514KB
The best known books about low level programming of the 28C/S. 285 page PDF.
By Paul Courbis and Sébastien Lalande. 2017/09/29

Part of the HP Calculator Archive,
Copyright 1997-2023 Eric Rechlin.