Skip to content
The most useful of my FOCAL programs
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.


The most useful of my FOCAL programs are contained in one 4K ROM image – the ISENE.ROM. The ROM includes:

  • UAC (Ultimate Alarm Clock) - The mother of all alarm clocks with all kinds of bells and whistles
  • TIMER - A simple program for sounding an alarm at a defined interval
  • D-W-D - Date to Week number to Date conversions
  • REM (REMembering) - PDA event management system
  • HOURS - Project hours registration
  • NOTES - Quick note taking for the HP-41
  • CRYPT - Encrypt/decrypt HP-41 XM ascii files
  • EVAL - Program to evaluate decisions agains a set of requirements
  • FINANCE - A Time-Value-Money (TVM) program
  • EASTER - Get the date for Easter Sunday for a given year
  • FILEMAN - Efficient file management system for the HP-41
  • FILE - File editing, viewing, printing
  • LIBXM - Utilities for handling XM files; Create, resize, sort
  • LIBHPX - Utilities for handling HEPAX files; Save/restore data/ascii files, resize
  • DMD - Convert between date formats: MM.DD <-> DD.MM
  • RNG - Random Number Generator based on TIME as the input

Read the pdf manual for a full overview.

ISENE.ROM was easily created with Håkan Thörngren's NutStudio.


This software is released into the Public Domain.

You can’t perform that action at this time.