hpcalc.org - HP 28 Archive

HP 28 Utilities

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

There are 29 files totaling 169 KB in this category.

ARC   (details) 28 ENG   12 KB / 1 KB
An HP 28S file compression/archival system. Easily compresses objects by 50%.
By Robert Peraino. 1998-07-31

Beep   (details) 28 ENG   1 KB / 1 KB
Simple program to turn the sound on and off.
By Pandy Holmberg. 1998-07-31

Calendar   (details) 28 ENG   2 KB / 1 KB
Scrollable calendar/clock program.
By Strauss Erez. 1998-07-31

Checksum   (details) 28 ENG   2 KB / 1 KB
Another checksum calculator.
By Friedrich Schroeder. 1998-07-31

CHK   (details) 28 ENG   1 KB / 1 KB
Checksum calculator.
By Robert Peraino. 1998-07-31

Clock   (details) 28 ENG   3 KB / 1 KB
Day/time clock.
By Eric Stuyvesant. 1998-07-31

Clock   (details) 28 ENG   4 KB / 2 KB
Clock and calendar program.
By James Gentles. 1998-07-31

Clock/Calendar   (details) 28 ENG   5 KB / 4 KB
Clock and calendar program.
By Stephen A. Luse. 1998-07-31

Composer   (details) 28 ENG   2 KB / 2 KB
Allows you to compose music.
By Dave Still. 1998-07-31

Crypt   (details) 28 ENG   2 KB / 1 KB
Encrypts and decrypts strings.
By Johan Olsson. 1998-07-31

DHC (Double Height Characters)   (details) 28 ENG   3 KB / 1 KB
This program modifies the 28C display driver settings that the bottom two lines are shown in double height.
By Christoph Gießelink. 2006-08-28

Directory Alphabetizer   (details) 28 ENG   1 KB / 1 KB
Orders any directory in ascending alphabetical order.
By John Gorton. 1998-07-31

EVAL TIMER 2004-08-08   (details) 49/50 48 28 ENG   5 KB / 1 KB
Timed evaluation of object, returning results in both ticks and seconds. Two programs (one for the 48 and 49 series, and the other for the 28 series) are provided as User RPL source code within the text file. These work correctly with any wordsize, and compensate for the time used by the program. Minor modification to match the individual calculator is required.
By James M. Prange. 2004-08-19

Fast   (details) 28 ENG   2 KB / 1 KB
Speeds up the HP 28.
By Fredrik Norrman. 1998-07-31

Fast 2   (details) 28 ENG   1 KB / 1 KB
Creates FAST with some SYSEVALs.
Author unknown. 1998-07-31

Flag Pack   (details) 28 ENG   2 KB / 1 KB
Allows one to name flags.
By Christian Wettergren. 1998-07-31

Framstags' Utilities   (details) 28 ENG   3 KB / 1 KB
A set of utilities for loading objects from your RAM disk, copying objects to your RAM disk, copying objects from your current directory to another directory, replacing objects from your current directory to another directory, showing the size of objects in bytes, replacing a substring with another substring in an object, and inserting a program into another program.
By Ulli Horlacher. 1998-07-31

Fuel Gauge   (details) 28 ENG   3 KB / 1 KB
"Fuel gauge" showing remaining battery power with a 1 or 0.
By Robert Peraino. 1998-07-31

HP Toolkit   (details) 28 ENG   15 KB / 1+ KB
Contents of one person's HP 28, with many useful utilities.
By Aaron Dinwiddie. 1998-07-31

Input   (details) 28 ENG   2 KB / 1 KB
Program for interactive input.
By Ulli Horlacher. 1998-07-31

List 2.1   (details) 28 ENG   8 KB / 5 KB
General list handler.
By B. Fahller. 1998-07-31

Off with ID   (details) 28 ENG   1 KB / 1 KB
Turns the HP 28 off and shows an identification screen upon powerup.
Author unknown. 1998-07-31

Pack/Unpack   (details) 28 ENG   2 KB / 1 KB
Makes it easy to move files around the HP 28 directory structure.
By Craig Lien. 1998-07-31

Recalling Directories   (details) 28 ENG   1 KB / 1 KB
Recalls a directory object onto the stack.
By Alonzo Gariepy. 1998-07-31

RJ IINPUT 1.0   (details) 49/50 48 28 ENG FRA   74 KB / 1 KB
ScreenshotVery interesting routine in RPL to key integer numbers without interrupting your program. I saw lot of requests in the newsgroup concerning such a function. Included is a small game to test RJ IINPUT (as Integer Input).
By Rémi Janelle. 2004-05-09

Service Call   (details) 28 ENG   1 KB / 1 KB
Makes commonly needed functions handy.
By Jan Christiaan van Winkel. 1998-07-31

Song   (details) 28 ENG   4 KB / 1+ KB
An extremely simple music maker program that plays music based on a sequence of frequencies and durations for the beeps. Includes a few sample songs.
By Gerard Pinzone. 2017-08-08

Speed   (details) 28 ENG   1 KB / 1 KB
Allows you to select the 28's speed on a scale of 1 to 15, with 7 being the default.
Author unknown. 1998-07-31

Using the HP28S as a Remote Control   (details) 28 ENG   6 KB / 1+ KB
Routines to use the 28S as a remote control.
By Michiel Niemeijer and Eric Toonen. 1998-07-31

Part of the HP Calculator Archive,
Copyright 1997-2024 Eric Rechlin.