I was reminded that it would be a good idea to mention that the HP model number of the plotter is 7595C.
Thanks much.
-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies -- http://www.bluefeathertech.com
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
A seller on ebay is selling of the media while he / she claims to be in
possession of the
system as well, I assume for those who admire "disk packs" or such.
Anyone interested might want to look in on the RK05 listed, and the 5
platter
disk pack listed.
seller: wvrunner rk05 auction number:220063749828
look under "view sellers other auctions" for the other pack, and maybe
keep an eye on this guy.
Merry Christmas to all
Jim
>
>Subject: Re: Weird disk drive
> From: Jules Richardson <julesrichardsonuk at yahoo.co.uk>
> Date: Sun, 24 Dec 2006 05:03:11 -0600
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>,
> sellam at vintagetech.com
>
>Sellam Ismail wrote:
>> It's basically just a disk drive that powers up and spins if you put a
>> disk in it.
>
>OK, questions:
>
>1) Any sign of any additional drive boards within the case or anything that
>might be ROM on the drive PCBs themselves?
>
>2) Does the disk keep spinning forever when you put it in, or just do a few
>revolutions and stop?
>
>3) When you put a disk in, do the heads step at all? Or does it just sit on
>track 0 all the time?
>
>
>And some initial guesses:
>
>1) Homebrew case which someone just never got around to finishing and adding a
>data connector to.
>
>2) Commercial prototype for testing various aspects (PSU heat dissipation,
>drive mounting, power socket mounting, case paint etc.)
>
>3) Tester for a *floppy disk* manufacturer (i.e. does my product foul a stock
>drive mechanism, does it fall apart in the heat of a typical enclosure etc.)
>
>4) Degausser (as you say) or other form of disk eraser
>
>5) TV / movie prop
>
>I'm quite liking the first and last ones - although the last one's probably
>only credible if the disk keeps spinning forever when you put it in.
>
>Some form of eraser might be possible if the thing's just wired to write junk;
>even if the heads don't move I suppose someone could have built a "poor man's
>eraser" which just trashes track 0 :-)
>
>Commercial 'pre-production' type products (2 and 3 above) do seem less likely
>- not because they wouldn't have existed, but because I'm surprised someone
>would bother to save them and/or they wouldn't have had a data connector added
>later to make a fully functioning unit.
>
>Can you take the route of asking the person you got it from - and if they
>weren't the original owner, following the chain back to the person who was?
>
>cheers
>
>Jules
Or #6:
Many of the trs80 external drive boxes (early non-RS product ca1978)
would just plug the cable to the drive and pass it out the case through
a space or gap. There was no formal external connector.
Also the external box for the NS* MDS-A (1978 also) had no external
connector though there was a noiceable notch in the rear of the case
to pass the 34wide ribbon cable through.
I've seen several of thses.
Allison
Does anyone know if the Remex paper tape reader/punch interface board for
PDP-11 marked "109831" is unibus or q-bus? Is it generic enough to work in
any PDP-11 with that bus?
Thanks,
Richard Lynch
a picture would be nice. Can the enclosure accept 2
drives? If so do they sit vertically? Whats the model
# of the drive itself?
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its too painful at times :%. But the question comes up
what software is intended to run on this
amalgamation...off the shelf or custom...
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its too painful at times :%. But the question comes up
what software is intended to run on this
amalgamation...off the shelf or custom...
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the Peanut used some sort of gate array to make the
vid memory appear as it were in cga space to the
warez, but was actually deep down low IIRC. If that helps..
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> Oh, that's another thing - is there a correct convention for track numbering?
> There seem to be equal numbers of apps out there which treat the first track
> as track zero as there are which treat it as track one :-) (Personal
> preference would be to number from zero, just because it likely makes some
> programming calculations easier, but I'm not sure if it's technically wrong to
> present that visually to the user...)
I'm not sure there is a correct convention. I do know that controller
programming can be a bit weird. The old AT-style controllers on PCs
seemed to want the cylinders and heads numbered from 0 and the
sectors numbered from 1. I don't have any hardware docs with
me at the moment, but that's what I've seen in drivers. As an aside,
it's fun to try to explain to a class who've only seen sanitized classroom
examples that the real world is filled with stuff like this. That's why
I like to teach OS with code, and not just general principles.
BLS
