Durango F-85
Intel 8275 Video display controller | |
| Input | keyboard, full stroke, 84 key |
|---|---|
| Successor | Durango "Poppy" |
The Durango F-85 was an early
PC DOS 2.0
in 1983.
The F-85 used single-sided 5¼-inch
Micropolis drives.[6] In later models this was expanded to a double-sided option for 960 KB (946/947 KB formatted[2][4][nb 1]) per diskette.[2][5][6][7]
Durango later dropped the "F-85" model name and adopted a user model system, with 700 being the entry model and 950 being the full-featured model.
Still later, they designed a 80186-/80286-based 16-bit system, the Durango "Poppy"; MS-DOS was selected as the entry operating system.
See also
Notes
- 100 tpi77-track floppy drives by default, and 1.892 MB is about twice as large as the physical drive capacity documented in various other sources (480 KB per side), therefore, by "on-line capacity" they must have meant the available storage capacity available to users for the combination of two drives.
References
- ^ CW Communications, Inc.: 1, 4. Retrieved 2017-06-13.
- ^ a b c d Comstock, George E. (2003-08-13). "Oral History of George Comstock" (PDF). Interviewed by Hendrie, Gardner. Mountain View, California, USA: Computer History Museum. CHM X2727.2004. Archived (PDF) from the original on 2017-03-23. Retrieved 2017-03-23.
[…] that's how we got Durango Systems started in 1977. And we opened the doors for business I think it was July or August of '77 and began designing a product, one of which is sitting right there. That's the Durango F85 computer […] We were on the startup of Durango, we raised our money and got going and in that case it took us another 15 months to start shipping product […]
- Computerworld, Inc.: 64. 1977-11-21. Retrieved 2017-06-13.
- ^ Durango Systems, Inc. Archived(PDF) from the original on 2017-03-23. Retrieved 2017-03-23.
- ^ a b c Guzis, Charles P. (October 2006). "The Durango F-85 Computer". Sydex. Archived from the original on 2017-03-23. Retrieved 2017-03-23.
- ^ a b Guzis, Charles P. (2009-09-13). "Durango GCR". Sydex. Archived from the original on 2017-03-25. Retrieved 2017-03-25.
- soft-sectored formats for each of its 77 tracks, yielding a maximum capacity of 1,892,000 bytes of file space on its double-sided version […] An add-on module available for the 1055 is comprised of two read/write heads and two drives, sharing a common controller. The subsystem capacity (formatted) with the module is 3,784,000 bytes […] Up to four 1055s, each with an add-on module, can be daisy-chainedto a common host for a maximum on-line storage capacity of more than 15M bytes […]
Further reading
- https://books.google.com/books?id=XPDvkYPCkWgC&pg=PA86&lpg=PA86
- https://books.google.com/books?id=Alpvxl7sBqIC&pg=RA1-PA63&lpg=RA1-PA63
- https://books.google.com/books?id=qZiwCwAAQBAJ&pg=PA185&lpg=PA185
External links
- "Durango F85". Old Computers. Archived from the original on 2017-03-23. Retrieved 2017-03-23.
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