The Differential Engine

These are the files you need. You can send them from the package contents below.

• ddx13.com → A:\SOFT programa de DOS 53.4 KB
• ddx13.icn → A:\SOFT icono, junto a su aplicación 200 B

No need to put ddx13.txt: they are manuals, source code or supporting material. Read them here and save 4.2 KB on a 1 MB disk.

1. Copy ddx13.com to A:\SOFT. They are DOS programs: run them from the DOS icon, or add A:\SOFT to the PATH in C:\AUTOEXEC.BAT to call them by name.
2. The .ICN files are icons: they go in the same folder as their application.

Derived from the package contents and the 200LX conventions. It installs to A: on purpose: C: is a RAM disk and every byte there is memory taken from the system.

Installation is easy. Put all files the same directory. This is a simple DOS programme that will run either under Application Manager (see appendix), or under DOS or DOS-based menu programmes (I run mine under HDM via MAXDOS, although the memory requirements are minimal). A 200LX compatible icon is included. This programme is optimised for the HP200LX, but will run 'as is' on a desktop, appearing rather low-res in comparison.

This programme can be distributed freely, but please do so in its original ZIPPED format containing all four components as listed above.

This programme is an ongoing project. It is basically a simple database and search engine. Future enhancements will comprise largely of additions or corrections to the existing data. Assistance in this regard is possible from second parties, and anyone wishing to contribute (contributers will be recognised in further releases) can email me and I will forward simple instructions regarding the data format (or, most of what you need to know can be accessed by hitting [F3] at the Symptom prompt), which can be added to the source code from plain text files.

Any comments or questions will be happily received at the above email address. (In fact, even simple aknowledgement that this programme has been used will help motivate me to update this and work on other projects).

If you use your Palmtop in a medical setting, then look out for other programmes I have worked on, also available from the S.U.P.E.R site, including:

--------------------------------------------------------------- - PEFR : looks up Expected Peak Expiratory Flow Rate in Adults from computerised tables and calculates clinically useful proportions in relation to usual and current PEFRs.

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Literal excerpt from ddx13.txt, exactly as it came in the package.