mirror of
https://github.com/davidgiven/fluxengine.git
synced 2025-10-24 11:11:02 -07:00
48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
f85
|
|
====
|
|
## 461kB 5.25" 77-track SS
|
|
<!-- This file is automatically generated. Do not edit. -->
|
|
|
|
The Durango F85 was an early office computer based around a 5MHz 8085 processor,
|
|
sold in 1977. It had an impressive 64kB of RAM, upgradable to 128kB, and ran
|
|
its own multitasking operating system call DX-85M, as well as CP/M. It had an
|
|
interesting electric-typewriter form factor, with a little monitor sitting on
|
|
the side of it --- in operation you were facing the 14" printer.
|
|
|
|
It was touted as being portable. Which it was, if you were strong; the story
|
|
is that they had to do an extensive search to find someone capable of lifting
|
|
it for the following photo...
|
|
|
|
<div style="text-align: center">
|
|
<img src="durangof85.jpg" style="max-width: 60%" alt="A Durango F85, held precariously">
|
|
</div>
|
|
|
|
...and even then, they had to airbrush out the tendons in her neck from the
|
|
effort!
|
|
|
|
It used 5.25 soft-sectored disks storing an impressive-for-those-days
|
|
480kBish on a side, using a proprietary 4-in-5 GCR encoding. They used 77
|
|
tracks, 12 sectors and 512 bytes per sector. Later models used double-sided
|
|
disks; I don't have access to an image of one so don't know how they work
|
|
(there's a suspicious looking spare byte in the sector header which could
|
|
store the side). As always, if you have one, please [get in
|
|
touch](https://github.com/davidgiven/fluxengine/issues/new).
|
|
|
|
## Options
|
|
|
|
(no options)
|
|
|
|
## Examples
|
|
|
|
To read:
|
|
|
|
- `fluxengine read -c f85 -s drive:0 -o f85.img`
|
|
|
|
## References
|
|
|
|
There's amazingly little information about these things.
|
|
|
|
* [Chuck Guzis' F85 page](http://www.sydex.com/durango/durango.html) with
|
|
lots of pictures
|
|
|