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Captures fine but no idea what system, anyone ?

Posted: Sat Oct 10, 2020 10:12 pm
by SunDown79
So I have several 5.25" disks that capture with 256 bytes per sector, 16 sectors, 80 tracks, MFM but I cant seem to find out what it is. The only format I could find that matches is Acorn 640K but the Acorn emulator RPCemu doesn't seem to like it (then again, I am no Acorn expert and I have also never owned an Acorn so would be strange that it ended up in one of the many boxes I have).

Any of you have an idea what this might be ?

The raw and preservation dumps can be found here in a zip file : https://gofile.io/d/6DJngC

Re: Captures fine but no idea what system, anyone ?

Posted: Sun Oct 11, 2020 5:01 pm
by brightcaster
I have no idea, but the contents of the disk may give you some clues about it's origin:

1. The diskette format is not CPM or MSDOS!

2. There is a header at hex 0400 "BOASIS ARCHIVE Version 5.5 15-03-91 08:15:17" ....

3. There is a string at hex 0201 "ARCHIVE VOLUME01"

4. There is a copyright notice at hex 1658 "Copyright (C) 1989 by Radiateuren Groothandel bv" followed by the adress and telephone number of the company.

5. The ASCII excerpts show dutch language with typical business aspects.

So this disk was written in the early 1990ies most likely with a professional business PC equipped with a real-time clock and the floppy is the first one of an archive of several (640kB, 80 tracks, 16 sectors of 256 bytes) volumes.

Maybe this helps you to remember...

David

Re: Captures fine but no idea what system, anyone ?

Posted: Sun Oct 11, 2020 7:10 pm
by SomeGuy
Keep in mind that some archive programs did not use the computer's native file system. So this disk could differ from normal disks from whatever machine it came from.

The use of quad density (80 track double density) and 256 byte sectors mostly rules out IBM PCs or IBM PC clones.

Re: Captures fine but no idea what system, anyone ?

Posted: Sun Oct 11, 2020 7:12 pm
by SunDown79
Ghe, well, a lot of different systems have passed through my hands (at one point I had more then 150 different systems) and did see the texts but the only thing that BOASIS, or OASIS, reminds me of is that Archos systems ran an os that was called Oasis. But it doesn't fit with the date as Archos systems are early 80's.
Is there any project going on that tries to identify all disk formats ? Perhaps some fingerprinting technique can be applied ? I am sure that a lot of people could supply "samples" (easy to think up things but harder to execute probably)

Re: Captures fine but no idea what system, anyone ?

Posted: Mon Oct 12, 2020 9:21 pm
by brightcaster
I got it! The floppy is from a televideo ts804 running the OASIS operating system....

http://bitsavers.trailing-edge.com/bits ... eo/TS-804/

http://bitsavers.org/pdf/televideo/TS_8 ... an1984.pdf

The manual describes the ARCHIV command, with which the floppy was created:

https://archive.org/details/bitsavers_p ... 5_11607264

You'll even find the "BOASIS ARCHIV version" string on the system disks!

David

Re: Captures fine but no idea what system, anyone ?

Posted: Mon Oct 12, 2020 9:45 pm
by SunDown79
Ha, excellent find! And I mixed up my naming, what I wrote down as Archos is Altos.
And with that and your info I found bitsavers has some images for that too : http://bitsavers.trailing-edge.com/bits ... ies_5/imd/
And double yes, that also has the BOASIS string :)
And triple yes, I have two Altos systems (and actually perhaps soon another two) but never run Oasis on it, just MPM (Multi-User CP/M)