Ethan Dicks [mailto:ethan.di...@gmail.com] wrote:
I suppose if you found a way to wedge the upper and lower arms of
the removable cartridge so the heads weren't damaged, ...
I think it's even harder than that - the firmware in the drive will spin down
if it thinks the removable cartridge
Bob
Take a look at the tu81 manual on bitsavers ek_tu81-tm_002_nov85.pdf
The appendix describes the m8739 unibus klesi. It's tmscp but it applies to
mscp as well.
Joe
On Jun 8, 2015, at 9:27 AM, Robert Armstrong b...@jfcl.com wrote:
tony duell [mailto:a...@p850ug1.demon.co.uk] wrote:
Is
tony duell [mailto:a...@p850ug1.demon.co.uk] wrote:
Is the KLESI printset on-line anywhere?
The schematics are online (sounds like they've been found now), but that
only tells you the electrical interface between the controller and the
drive. That part's pretty simple (which is why it looks
Yeah, there were a few CDC drives like that ... I encountered a few Hawk
drives once on an old Alpha Micro S-100 machine long ago; I believe it
was, five megs fixed, five megs removable?
The pack was about the size of a garbage can lid and I believe the unit
spun them up to around 2400 RPM or so
On 2015-06-08 07:50, ben wrote:
On 6/7/2015 11:08 PM, tony duell wrote:
That should be trivial. I've never laid hands on an RC25, but there
must be a microswitch that detects when a cartridge is installed, and
is accessible for bodging...?
Yes, and don't do it!
In every fixed/removeable
On Mon, Jun 8, 2015 at 2:22 PM, Ethan Dicks ethan.di...@gmail.com wrote:
On Sun, Jun 7, 2015 at 9:44 PM, Mike Ross tmfdm...@gmail.com wrote:
That should be trivial. I've never laid hands on an RC25, but there
must be a microswitch that detects when a cartridge is installed, and
is accessible
On Tue, Jun 9, 2015 at 2:06 AM, Paul Koning paulkon...@comcast.net wrote:
On Jun 8, 2015, at 10:02 AM, Mike Ross tmfdm...@gmail.com wrote:
...
Ugh OK, I've never laid hands on one as I said; for some reason I
thought the cartridge on these was a sealed unit containing the heads,
like some
The RC25 was one of the last cartridge drives (before fixed drives came back
in small sizes and exploding
capacity), somewhat interesting because of its compact size, and very odd and
hard to use because the
designers threw in a fixed platter. Perhaps they thought that it was a good
it's true very little LESI documentation escaped...But the klesi schematic
did. and it's well commented. lots of descriptive signal names. The
hardware to interface to it is almost trivial. I took a couple of hours
looking over the schematic and have written a couple of pages describing
how
That should be trivial. I've never laid hands on an RC25, but there
must be a microswitch that detects when a cartridge is installed, and
is accessible for bodging...?
Yes, and don't do it!
In every fixed/removeable drive I have worked on (OK, never an RC25, but...)
the heads for both the
I found a file in my archive I got somewhere... I thought it was bitsavers.
Mp01876_klesi_engrdrws_aug84.pdf
Joe
On Jun 7, 2015, at 1:03 PM, tony duell a...@p850ug1.demon.co.uk wrote:
it's true very little LESI documentation escaped...But the klesi schematic
did. and it's well commented.
I downloaded the rc-25 set from bitsavers. The klesi (q and u) prints were at
the end.
Joe
On Jun 7, 2015, at 1:03 PM, tony duell a...@p850ug1.demon.co.uk wrote:
it's true very little LESI documentation escaped...But the klesi schematic
did. and it's well commented. lots of descriptive
On Fri, Jun 5, 2015 at 1:52 PM, Ian S. King isk...@uw.edu wrote:
The UC07 manual on Bitsavers shows this as a Qbus adapter - although I'd
sure think it was Unibus from the name. The seller calls it out as Qbus
and the documents back him/her up.
Yeah. I have one. It's Qbus. Nothing wrong
The UC07 manual on Bitsavers shows this as a Qbus adapter - although I'd
sure think it was Unibus from the name. The seller calls it out as Qbus
and the documents back him/her up.
On Fri, Jun 5, 2015 at 5:31 PM, Toby Thain t...@telegraphics.com.au wrote:
On 2015-06-04 8:49 PM, Ethan Dicks
On 2015-06-05 2:05 PM, Ethan Dicks wrote:
On Fri, Jun 5, 2015 at 1:52 PM, Ian S. King isk...@uw.edu wrote:
The UC07 manual on Bitsavers shows this as a Qbus adapter - although I'd
sure think it was Unibus from the name. The seller calls it out as Qbus
and the documents back him/her up.
Yeah.
Ethan Dicks [ethan.di...@gmail.com] wrote:
did not come with a removable cartridge so I've not been able to spin it up
Yes, one of the annoyances of the RC25 is that you can't spin it up w/o the
removable platter in place. I have only one cartridge myself, and it's
probably bad. Somebody
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