HP200LX: How to handle DOS Apps in disk image?

Hi,

I download DERIVE and MathCAD for DOS, but all the
files are packed as disk image .img files.

Does anybody know how to unpack them to get the
regular files? Or is there a way to install the apps
using the .img files directly on the HP200LX?


Thanks!

Not sure if it applies to HP200LX, but there are tools to do that.

One such tool is this:
https://hp.vector.co.jp/authors/VA013937/editdisk/index_e.html

Edited by stingraze 2024-04-17 10:07 AM

https://www.hpmuseum.org/forum/thread-21511-post-186170.html#pid186170

It cites this workaround: "Mathcad 2.5 from here and Derive 3 from here are probably last versions that work on 200LX. I checked both and they run fine (see below). Just download .7z files and use a tool like 7-zip to extract files (from .img floppy images). Then put extracted files in a new directory on your CF card and run the exe."

Let us know if that works.

Jake

I used Derive 2.something with my HP95 during the nineties. Worked fine and it was the only symbolic algebra system I got up and running on this thing.

I can give it to you as simple zip.

The *.img is no compression but simply a disk imager that puts your whole drive (a with all the (hidden) sectors into one file.

There are DOS programs to mount such images. Or a Win95 program which I prefer. With Linux it is imgmount.