>Ok, maybe not. How about drawing eyes and a mouth on a broken
>monitor... a Jack-o-CRT?
Jack-o-CRT? Humm... maybe my wife should have made one of those last
night. Instead she spent 3 hours carving a really nice ornate design into
a pumpkin... to come home this afternoon and find that a rabbit ate the
entire front out... now it is just an orange ball with a giant hole in
the middle.
Needless to say... I'm staying at work EXTRA late today... I'm not going
home till she's a tad less pissed off.
-chris
<http://www.mythtech.net>
Brian --
> did you upgrade from 4.3.3 to 5L on the 591? i've currently got 4.3.3
> on my 591 and was wondering if it was worth upgrading to 5L or not.
Yes and no. I started with 4.3.3, but when I upgraded, I did a build from
scratch. For most uses the upgrade isn't that worthwhile. The GUI tools run
even slower than they do in 4.3.3. And there's no great differentiation in
software compatibility. The real bonus is linux compatibility libraries. I
don't compile much on the AIX machines, so I'm less concerned. Mine get
used as administrative workstations...and...er... and as a mainframe. The
591 has the P390 card. It's my sandbox for OS390, something I don't know a
lot about but have a consuming curiousity for. The real reason I keep them
current is to keep me current.
-Colin
I recently acquired a rather aged Compaq "portable" that defies
identification, the plate says Model: Compaq, Serial number: 002027. Size
is 19 1/2 wide, 15 1/2 deep, 9 1/4 high with a 8 in "green screen".On the
right side to the rear is a sliding cover over 5 slots, 3 filled, the
left side slides open to expose the fan and switch and provides power
cord storage. It has two 5 1/4 360k drives. The keyboard locks over the
front for transport and it has a leather carrying handle on the back. Can
anyone provide me any info on this machine
Am also looking for info on a Kaypro 16, Dos machine
Thanks, Rich
Sounds like the original Compaq portable, one of the computers that "made"
Compaq.
The Compaq Portable II usually said that, it was a bit smaller and had 1.2
floppies.
All the others are smaller.
Does it have a hardcard installed in one of those slots? Does it boot?
Paxton
Astoria, Oregon
>From: "Patrick Finnegan" <pat(a)purdueriots.com>
>
>I know this is a bit OT, becuase it's not really computer related, but the
>hardware is at least 23 years old, so that's my excuse for posting to the
>list...
>
>I've got a 35mW HeNe Laser + Power supply that I picked up today for next
>to nothing. It seems to be having some problems - the laser (somtimes)
>blinks a few times when I first turn it on, and then stops. From the
>sound of the power supply it's either a loose connection (which I doubt
>after opening it up and taking a good look around) or there's a problem
>with the power supply.
>
>Now, I've never really worked on a HV power supply before, and I'm trying
>to be careful when I play with things. First off, does anyone have a
>general idea of what sized dummy load ("resisitor") I should try haning
>off of the HV output to properly load it? I noticed that the laser tube
>has 3x27kohm resistors in series, would a couple watt approx 81kohm
>resistor be a good idea?
>
>Also, does anyone have an idea for a failure mode to look for? I've got
>an O'scope, dmm, and various other tools at my disposal, but no
>'authentic' HV test/mesurement gear.
Hi
I know this doesn't make sense at first but it is most likely
that the failure is in the HeNe tube and not the power supply.
The general failure starts with the lasing pulsing at slower
and slower rates until it stops working.
The problem is caused by the He leaking out of the tube.
I know you'd say, how can that happen when inside the tube
is a partial vacuum. Well, it has to do with partial pressures.
The partial pressure of He is lower out side of the tube than
inside, so it leaks out. It is also related to the slipperiness
of He. It leaks through everything, including glass.
Try another tube that is known to be good.
Dwight
>
>I'm just looking for general guidelines.
>
>Thanks!
>
>Pat
>--
>"The Microsoft/IBM FORTRAN was adequate for teaching FORTRAN 77. But the
>performance was AMAZING! It could actually take longer to run a benchmark
>like sieve of Erastothanes with compiled FORTRAN than with interpreted
>BASIC."
> -- Fred Cisin (XenoSoft)
>http://dilbert.com/comics/dilbert/archive/images/dilbert2040637020924.gif
>
>
>
I just got a Hazeltine 1421 terminal. When I first got it, It showed
nothing but garbage on the screen, then I took it apart and cleaned
everything, reseated chips and cleaned their pins. I fired it up again
and it worked perfectly, save for the keyboard jamming on some keys. I
cleaned the keyboard completely, and was able to fix most of the
problems, except the keyboard is missing the "-" keytop, the "T" key
jams occasionally, "E" is erratic and "J" is really gouged and bent,
and falls off easy (looks like someone dropped something heavy on the
keyboard). All in all, save for the keyboard, it's in very good shape.
The question that I have is wether anyone has heard of or seen a
Hazeltiine 1421. I haven't been able to find anything on the internet,
but I did find the Hazeltine 1420 manual on vt100.net. Linux doesn't
seem to have an entry for the 1421, but it does have one for the 1420.
Inside the access panel is a switch labelled "1420" and "Other". I have
tried it on "1420", and told Linux that it is a 1420. It is barely
useable. No programs will display properly, things like pico and pine
get really screwed up, not clearing the text from the screen when they
write the next screen, etc, even screen seems to do funny things to it,
sometimes after exiting programs or typing "clear" the prompt appears
in the middle of the screen. I am guessing this is either due to the
termcap or terminfo(what's the difference, I always forget?) entry, the
settings on my terminal, or maybe the programs I am trying to use
aren't meant to deal with a Hazeltine terminal. I would appreciate any
information anyone has on this terminal. Thanks!
Ian Primus
ian_primus(a)yahoo.com
> From: Tony Duell <ard(a)p850ug1.demon.co.uk>
> Most of the I/O connectors are on the bottom...
Okay, *bottom of the unit towards the rear* :>)
> So far, so good. I assume you've identified the mains input as well.
Yeah, that would be pretty hard to miss!
> On the bottom are 4 connectors. The 2 neares the back of the machine are
> on the CPU board and consist of the parallel printer port (34 pin,
> towards the floppy drive side of the machine) and the I/O expansion bus
> (50 pin).
>
> In front of the parallel port is another 34 pin edge connector, which is
> part of the floppy controller card. It's for external floppy drives (You
> can connect 2 more drives here, I think you set them as DS0 and DS1, and
> you need to terminate the last drive on the cable).
>
> In front of the I/O bus is the DB25 RS232 port.
>
> > parallel port as a 34-pin card-edge connector (which I suppose needs a
> > Tandy-specific cable to attach to a printer), but the problem is that
there
>
> Yes, but it's an easy cable to make up. It's just a 34 pin edge connector
> on one end of a piece of ribbon cable and a 36 pin Blue Ribbon
> ('Centronics') plug on the other. Leave pins 18 and 36 on the BLue Ribbon
> connector unconnected, match up the pin 1s of the 2 connectors. Then just
> crimp the connectors onto the cable -- there are no twists or swaps to
> worry about.
Thanks for the information. I'll be poking around this critter more this
weekend. Any gotchas I should know about?
Later --
Glen
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