1 Aug
2005
1 Aug
'05
12:53 p.m.
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
Can't be! The 9830 tape drive and cassette are
very different to those
used in the 9825.
Mea Culpa. Its from the 9825A manual. The web page had the correct
attribution all along. I do not know what I was thinking as I was
typing the article (prob 9835 as I have the service manual for that
one as well).
----------------------------
"Joe R." <rigdonj at cfl.rr.com> wrote:
You might want to add this picture
<http://www.classiccmp.org/hp/hp-tape.jpg>
from my website. It shows the tape and belt paths better than the one you
have does.
I have added it to the page, much appreciate it. It is better, although
kinda low res. Anybody have a better scan of that image?
Thanks
**vp
1 Aug
1 Aug
12:28 p.m.
At 03:53 PM 8/1/05 -0400, you wrote:
I think I have a copy of that issue of the HPJ. I'll see if that picture
is in it.
Joe
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
<http://www.classiccmp.org/hp/hp-tape.jpg>
Can't be! The 9830 tape drive and cassette
are very different to those
used in the 9825.
Mea Culpa. Its from the 9825A manual. The web page had the correct
attribution all along. I do not know what I was thinking as I was
typing the article (prob 9835 as I have the service manual for that
one as well).
----------------------------
"Joe R." <rigdonj at cfl.rr.com> wrote:
> You might want to add this picture
from my
website. It shows the tape and belt paths better than the one you
have does.
I have added it to the page, much appreciate it. It is better, although
kinda low res. Anybody have a better scan of that image?
Thanks
**vp
2 Aug
2 Aug
9:46 a.m.
On 1 Aug 2005 at 19:28, Joe R. wrote:
I think I have a copy of that issue of the HPJ.
I'll see if that
picture is in it.
The HP 264x terminals also used the 3M DC100 tape cartridge. Appendix D of
the "2641A/2645A/2645S/N Display Station Reference Manual" (HP 02645-90005)
is entitled "Tape Cartridge Rethreading" and has a full page of directions
and drawings. It's available at:
http://www.bitsavers.org/pdf/hp/terminal/02645-90005_2645ref_Oct77.pdf
On 1 Aug 2005 at 15:53, Vassilis Prevelakis wrote:
I have added it to the page, much appreciate it. It is
better,
although kinda low res. Anybody have a better scan of that image?
If you want to use the drawing from the 264x manual, and you would like an
image of higher resolution than the above (I believe that Al scans at 400
dpi), let me know, and I'll make one from my manual.
-- Dave
1 Aug
1 Aug
4:01 p.m.
ard at p850ug1.demon.co.uk (Tony Duell) wrote:
I thought so. I've seen the official service manuals for virtually all
these machines (and then go back to my own pile of schematics when I
actually need to fix the things...)
Can't be! The 9830 tape drive and cassette
are very different to those
used in the 9825.
Mea Culpa. Its from the 9825A manual. The web page had the correct attribution all along. I do not know what I was
thinking as I was
typing the article (prob 9835 as I have the service manual for that
one as well).
The 9835 is one machine of that family that I've not had a chance to see
inside (I've seen inside the 9825, 9831 and 9845B). I am told it's
roughly an HP9845 with all the good bits taken out, I would like to know
if any of the good bits were left in, though. One day I'll probably get
to pull one apart.
I am also told that the 9845A is _very_ different to the 9845B (to the
extent that the former has one board with the 2 BPC processors on it,
another board with the bus arbitration/switching on it, the latter
certainly has 2 boards with one processor and half the bus control logic
on each). Again maybe I'll get to see one one day.
-tony
6864
days inactive
6865
days old
3 comments
4 participants
participants (4)
-
ard＠p850ug1.demon.co.uk -
jdbryan＠acm.org -
rigdonj＠cfl.rr.com -
vp＠cs.drexel.edu