All:
I have a bunch of spare stuff laying around looking for a good home:
* Compaq DLT-III 5/10gb drive in external case. Working.
* Compaq DLT-IV 35/70gb drive in external case. Working.
* Philips Velo 1 WinCE PC. Worked when last used several years ago. B&W.
* Tandy 2000 case parts (top, bottom, front plastic case pieces). No
drive or switch filler plates included. Kind of yellowed.
* Tandy 2000 VM-1 monochrome monitor (works, spare). Kind of yellowed.
* Tandy 2000 MS-DOS and BASIC document binders with manuals. Condition
fair (intact but dirty).
* Atari ST-1224 monitor. Bought to hack to use with the T2K until I
found a real CM-1.
I hope to get around $10 for each item except the Atari monitor which I
hope to get $25 (same price I paid), plus shipping from 11791. Other
reasonable offers/combinations considered. For those preferring to trade,
I?m looking for early Compute! Magazines (issues prior to #22 but not 3, 8,
or 9), a plastic case for my KIM-1, the software support disk for the Ampro
LittleBoard/186, the Windows 1.03 driver disk for the Tandy 2000, or a
working 5.25? floppy system with disk for my IMSAI.
Please contact off-list if interested. Thanks.
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.comhttp://highgate.comm.sfu.ca/~rcini/classiccmp
Hi
Strangly enough I do have an EHT meter. It's a legacy of building my own
colour TV when colour came to the UK in the 1970's.
Rod
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 22 August 2007 22:38
To: cctalk at classiccmp.org
Subject: Re: Tube or not Tube
>
>
> > Before doing anything drastic it crossed my mind that somebody at
> > some may have changed the tube in a DEC terminal.
> > There are two issues with this one.
> >
> > a) Where do you get the replacement tube from.
>
> Typically, from something else. Like other terminals, 12" monochrome
> PC monitors, and portable black and white television sets. A lot of
> these tubes are
Yes. It's almost impossible to get a 'bare' CRT, since often replacing a
CRT is regarded as uneconomic, so nobody stocks the spares. I know that
when I needed a CRT from a Volker-Craig terminal, I bought a cheap
monochrome TV and raided it for the CRT.
> interchangeable. I've run across some that aren't, but for the most
> part, with black and white tubes, if the base fits, the neck and
> deflection angle is the same, and the heater is the same voltage, it's
> a good chance it will work.
There are baspically 2 types of mono CRT. Thick necks with a B8H base
and a 6.3V heater and thin neckes with a modifed B7G base and an 11.5V
heater. Almost all mono monitor and termial CRTs have a 90 degree
deflection angle.
> > b) How do you fit it.
>
> #include <std_disclaimer.h>
>
> Carefully. :) You want to be sure to discharge the high voltage first
> (in both the terminal, and whatever you're stealing a tube from!). To
> do this, attach a length of wire to the metal shaft of a flat blade
> screwdriver, and ground the wire to the chassis of the
> terminal/whatever. Hold the insulated plastic handle
I would recoemnd against this method. When the contact is made, the peak
current can be quite high. High enough to damage the connation between
the anode cap and the anode coating inside the CRT. And since that
current will flwo where it feels like, it can, if you're not careful,
damage semiconductors all aover the chassis.
What I do is use my EHT meter. It has a resistance of 800MOhms, and is
desigend to handle up to 50kV. Connect the ground lead of the meter to
the CRT earth (the metal contacts that touch the outer aquadag coating),
and put the probe under the anode cap. Hold it there for a minute or so
and the CRT will be discharged
> of the screwdriver and slide it under the rubber suction cup of the
> picture tube, until you feel the metal clip inside. Typically, this
> will be accompanied by a *CRACK* as the high voltage discharges.
> (Although, it is possible that the HV dissapated earlier, depends on
> the terminal) Do this twice just to be sure.
>
> To remove the clip, peel up the rubber suction cup, and you'll see
> it's a hooked clip that fits into a hole in the tube. Squeeze the clip
> together and gently remove it.
Normally, once you've freed the edgesof the cape from the CRT glass, you
can move the whole thing over to compress one side of the contact and
release the other. This avoids having to touch the high voltage terminal
(even though it should be discharged.)
[...]
> yourself). Once the yoke is level, shut the terminal off and tighten
> the yoke so it won't move.
But not too tight. You don't want to crack the new CRT...
The old rule (not to be taken seriously, of course) was to tighten the
clamp until the CRT implodes, then back off a quarter of a turn ;-)
-tony
Hi
Most of your deductions are correct. In 1983, the VT220 replaced the
VT100 in text applications, with the VT240/VT241 used where remote
graphics (ReGIS and Sixel) were required. So add a keyboard and monitor
as per your deductions and an application generating ReGIS or Sixel
output and there you have it.
Rod Smallwood
The DecCollector.
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 22 August 2007 23:01
To: cctalk at classiccmp.org
Subject: DEC VT240 terminal
I've just bought the base unit (VS240) for a VT240 terminal on E-bay and
know little about it (OK, I know it's a DEC graphics terminal). Perhaps
somebody can enlightent me
1) One site i looked at said a VT240 is a monochrome unit, a VT241 is
the colour version. Is the only difference the monitor? Can I use a
colour monitor with my base unit?
2) On the back are obvious connectors for an RS232 port (DB25), current
loop (8 pin mate-n-lock). There's a DE9 labelled 'PR', presumably a
printer port, also RS232. A RJ11 keyboard socket, I assume an LK201 will
work here (yes?). A BNC which seems ot be composite mono video. And a
DA15 plug, also for a monitor. I assume a VR201 links here, or a V241
with the right cable. Also, can I connect the keybaord to, say, the back
of the VR201, or do I have to use the RJ11 on the terminal itself?
3) How much is known about the insides? Of course I've taken it apart.
It's really easy to get inside, just undo 2 screws on the bottom at the
very front and remove the top cabinet shell (lift it up from the front).
Then release 2 nylatch fasteners and lift up the metal screening cover.
The PSU (a switch-mode unit) is inside the cover. Reach inside and unlug
the PSU ribbon cable from the mainboard and remove the cover/PSU. The
mainboard comes out by releasing 3 more nyl atch fasteners.
On this board, there's an 8085, 2681 (dual serial chip), 8251 (USART,
maybe used for the keybaord interface), 7220 (graphics chip) -- along
with what seemms to be much the same circuitry as a Rainbow colour card,
there are a couple of PALs, I've not checked to see if they're the same
as the ones in the 'bow. Pletny of RAM and ROM, and some glue logic. And
another 40 pin chip, DC310. For some reason this is saying 'processor'
to me. Is it?
-tony
Anyone happen to have a pinout for this beastie?
Nothing too exciting - but getting bounced around parts suppliers when
Googling for a pinout is starting to drive me insane :-]
ta
J.
Hi guys...
I have a truly huge number of old 3.5" HD floppy disks which no longer work.
Attempting to format them in DOS returns the largely unhelpful "Invalid
media or Track 0 bad - disk unusable" error message.
I'm guessing it's because these disks are old (pushing on for 20 years in
some cases, and I'm fairly sure they're *all* over 10 years), and they've
degraded over time, or the magnetic signals have become disorientated, or
some such technical explanation.... However, the result is, they're so much
plastic scrap at the moment.
Is there any device/program/machine I can use to restore these floppys back
to working order? I'm not overly bothered about keeping the data that's on
many of them (although if there IS a way to preserve it, that'd be great),
but they do still sometimes come in useful, and it'd be a shame to bin so
many of them.
Cheers!
Ade.
PS: Most of my old 5.25" disks, despite being up to 30 years old, are all
working fine. Similarly, most of my old Sinclair microdrive cassettes, which
are >20 years old, are also fine - at least, the ones where the little foam
pad hasn't perished are. Similarly, many of the compact cassettes I have for
various old 20+ year old home computers still work.... are 3.5" 1.44MB
floppies just inherently useless?
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.484 / Virus Database: 269.12.0/960 - Release Date: 18/08/2007
15:48
Arno Kletzander wrote:
Hello Listers,
last week I acquired what seems to be a Tektronix 4002 terminal - at least
that's what a sticker on the rear of the base says. The front bezel with the
type designation was nowhere to be found - apart from that, the unit looks
just like the one at
http://www.science.uva.nl/museum/tek4002a.html
Thanks in advance, yours sincerely
--
Arno Kletzander
----------------------------------------
Hey - Great site. Thanks for the reference. I especially like the scans of
old instruction cards, one of my favorite pieces of collectable history.
Billy
http://www.science.uva.nl/museum/instr_ref_cards.html
Sridhar Ayengar wrote:
Obviously there's a geek on that production staff somewhere. I wonder
if it would be possible to find out who.
Peace... Sridhar
--------------
Well... maybe. Far more likely that it is part of the warehouse stock that
most studios keep. For longer than I can remember, they have set people who
go around to the auctions and buy up anything that looks like it might fit
in a movie. I've run into them at flea markets and some of the scrap yards.
I've been told by one of them, that there are literally warehouses full of
stuff that looks "sci-fi-ish" - ie, blinking lights. I know of at least two
large CDC sites that were bought at auction just for the tapes and consoles.
Of course, they then add a lot of lights and install the flash and smoke
bombs for the inevitable "computer goes insane and explodes" clich?. One of
their current sources of baubles is: http://www.apexelectronic.com/
Billy
Jules Richardson wrote:
Nothing too exciting - but getting bounced around parts suppliers when
Googling for a pinout is starting to drive me insane :-]
ta
J.
------------------------------
It IS extremely annoying and frustrating! I really don't give a damn what
they have stock. Wish there was a way to disable them and get to the one or
two sites with the pinouts. And who don't want to sell you a $100/year
membership.
Billy
At 10:02 -0500 8/22/07, Mr Ian Primus wrote:
>Carefully. :) You want to be sure to discharge the
>high voltage first (in both the terminal, and whatever
>you're stealing a tube from!). To do this, attach a
>length of wire to the metal shaft of a flat blade
>screwdriver, and ground the wire to the chassis of the
>terminal/whatever.
...via a high-voltage, mega-ohm resistor. Part of the reason for
discharging the thing is to prevent lots of electrons moving anywhere
too fast. Better they should go to ground too fast than through you
too fast, but you'll bounce ground all over the machine that way,
which could be tough on other parts of the electronics. The resistor
makes it all happen slower. You probably miss out on hearing the
"crack" that way, but it still is better.
Love the subject line - another shakespeare fan surfaces...
--
- Mark, 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
I have uploaded a pdf of the article The Electronic Brain by W.R. Ashby,
M.A., M.D. from the March 1949 issue of Radio Electronics to my web site,
along with other updates. Ashby describes the Homeostat and it's
potential for building an artificial intelligence computer.
vintagecomputer.net/electronic_brain.cfm
Bill D
Hello Listers,
last week I acquired what seems to be a Tektronix 4002 terminal - at least that's what a sticker on the rear of the base says. The front bezel with the type designation was nowhere to be found - apart from that, the unit looks just like the one at
http://www.science.uva.nl/museum/tek4002a.html
The "screen" part was missing, but we located a display unit (obviously self-contained - this matches the description above) nearby which has aluminum mounting rails to fit the screw holes in the base of the terminal. It has a power inlet and a DB-25 connector carrying what I suppose to be "raw" deflection/control signals - this would match the connectors available at the back of the terminal base, apart from the fact that the power connector coming from the base is an IEC coupler and the inlet on the back of the display isn't (has a round PE pin - the P and N blades fit the IEC coupler).
So far I have a few questions about this thing:
-Is the display we found really the one that goes with the base?
-What kind of cable do I need to connect the two? (http://www.science.uva.nl/museum/rampspoed.html shows how it looks, but what are the actual connections - 1:1 or something different? Perhaps even some coax or twisted pairs?)
-Some of the slots in the backplane of the base unit are unpopulated. Is this normal?
-and last but not least, are there any special pitfalls I should be on the lookout for when I finally go about powering the thing on? Will it probably need capacitor reforming beforehand?
Thanks in advance, yours sincerely
--
Arno Kletzander
Hilfskraft Informatik Sammlung Erlangen
www.iser.uni-erlangen.de
Psssst! Schon vom neuen GMX MultiMessenger geh?rt?
Der kanns mit allen: http://www.gmx.net/de/go/multimessenger
Thanks Ian
All points noted.
As somebody who worked for four years in a high voltage
test lab I agree re precautions.
Rod
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Mr Ian Primus
Sent: 22 August 2007 11:40
To: General Discussion: On-Topic Posts Only
Subject: Re: Tube or not Tube
> Before doing anything drastic it crossed my mind that somebody at some
> may have changed the tube in a DEC terminal.
> There are two issues with this one.
>
> a) Where do you get the replacement tube from.
Typically, from something else. Like other terminals, 12" monochrome PC
monitors, and portable black and white television sets. A lot of these
tubes are interchangeable. I've run across some that aren't, but for the
most part, with black and white tubes, if the base fits, the neck and
deflection angle is the same, and the heater is the same voltage, it's a
good chance it will work.
> b) How do you fit it.
#include <std_disclaimer.h>
Carefully. :) You want to be sure to discharge the high voltage first
(in both the terminal, and whatever you're stealing a tube from!). To do
this, attach a length of wire to the metal shaft of a flat blade
screwdriver, and ground the wire to the chassis of the
terminal/whatever. Hold the insulated plastic handle of the screwdriver
and slide it under the rubber suction cup of the picture tube, until you
feel the metal clip inside. Typically, this will be accompanied by a
*CRACK* as the high voltage discharges.
(Although, it is possible that the HV dissapated earlier, depends on the
terminal) Do this twice just to be sure.
To remove the clip, peel up the rubber suction cup, and you'll see it's
a hooked clip that fits into a hole in the tube. Squeeze the clip
together and gently remove it.
Obviously, you'll want to disconnect the other wires leading to the tube
- the base socket, and the yoke connector. Disconnect the yoke at the
board, and leave it on the tube as you remove it. Unbolt the tube from
the frame, and pull it out, careful not to break the neck. Also watch
out for ground leads.
The new tube needs to physically fit and mount in the terminal. There
are two basic types of picture tube - the tubes with ears that bolt to
something, and the tubes without ears, that use a metal ring to hold
them to whatever. (VT100's have ears, VT220's don't). Your replacement
tube must be of the same type in order to fit.
The yoke needs to stay with the terminal. This is the copper coil thing
on the back of the tube. Loosen the screws that clamp it to the neck of
the tube and carefully remove it. Remember what way is up. You'll need
to move this to your new tube. Try to get it on straight - it controls
deflection, and if it's on crooked, the picture will be crooked. It's
easy to adjust later though.
Reassemble terminal with new tube. Cross your fingers and hit the
switch. If it works, adjust your yoke for a level picture (carefully,
you don't want to zap yourself). Once the yoke is level, shut the
terminal off and tighten the yoke so it won't move.
> If anybody has tried it I would be pleased to hear how they got on.
I have replaced the tubes in a couple things, and had pretty good luck.
I replaced the tube in a VT100 with one from a PC monochrome monitor,
and it works well.
One time, I even swapped a worn out IBM monitor tube back into a
television. It was the only TV ever with WordPerfect screen burn. And
those long persistance phosphors make TV look really weird. I kept it
around as a joke for a while - I said that it was a black and white TV I
converted to color. (Green is a color).
-Ian
* Be careful messing with high voltage stuff! Keep one hand behind your
back when discharging tubes, and be sure your discharge tool is properly
grounded to the metal chassis of the device. There's several kV
potentially stored in there. I don't believe there's enough in a
terminal to kill you, but it'll hurt like hell. Best to be as careful as
you can.
What is it? I have a BASIC manual (somewhere) for this
machine. Durn must be rarer then the Vicki.
And on that note, which units would classify as the
top 5 or 10 rarest portables. No goofy handheld
things, the largest majority of which aren't even vintage.
____________________________________________________________________________________
Got a little couch potato?
Check out fun summer activities for kids.
http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&…
On 8/21/07, Zane H. Healy <healyzh at aracnet.com> wrote:
>
> The price is not insane, ELI is a legitimate DEC reseller who just
> happens to have an eBay presence. A top of the line VAX can still go
> for big $$$'s as there are those looking to stay on real hardware,
Interesting, I didn't know the line went on that long (a list I found
put that model's introduction at 1996.)
At work we had a VaxStation 4000 that was still being used for
compiling certain code. Instead of relying on keeping it going, we
spent the big $ on the Charon Vax emulator. It's working fine, but I
have to wonder if SimH would have done the job as well :)
--
jht
Hello,
excuse me for this e-mail, but some years ago I had downloaded the CD
image you provided of the item in subject. Now for an accident I deleted
the files and would like to have them again but the link, after about
five years, disappeared :(
http://archive.netbsd.se/?ml=cctech&a=2003-04&m=157390
Do you happen to still have these files?
Thanks!
--
___ __
/ __|___ Daniele Gratteri, Italian Commodore-Amiga user... ///
| / |__/ Nickname: FIAT1100D - ICQ: 53943994 Ritmo S75 __ ///
| \__|__\ Home page: http://www.gratteri.tk forever! \\\///
\___| E-MAIL: daniele at gratteri.tk ...since 1990 \///
IBM PS/2 Model 9595 chassis -- an 8595 chassis won't do
Syskonnect Microchannel FDDI cards
Any turbochannel cards (PMAZC, PMAD, PMAG-C -D -E -F, etc)
DEC Star coupler
CI cables
CI for any bus
BA441 chassis (I need four)
BA431 chassis
MS690 Memory
DEFQA
Cab kit for DEMFA
MS02-CA Memory
DEFTA
RA73 (did they make an RA74?)
ChipChat sound card
Roland CM-500
CIPCA
In addition, I will need two racks soon.
Thanks.
Peace... Sridhar
On 8/21/07, Zane H. Healy <healyzh at aracnet.com> wrote:
> At the same time this is the first photograph I've ever seen of one
> of these systems. Somewhere I have the golden egg describing it.
>
> Zane
Hah, the price is insane. Love those ebay "liquidators." Was that
the last ever VAX?
Hi, Jules
-------------- Original message from Jules Richardson <julesrichardsonuk at yahoo.co.uk>: --------------
> g-wright at att.net wrote:
> > Hi,
> >
> > I have a couple of these and need some information.
> > These are NCR mini tower servers with a 68000 cpu.
The mother board says mini tower on it. model is listed as a 3450
the mother board has 530xxx number on it with a 1984 date.
the demenions are 24"H x 24"D x 5"W
The manuals all cover tower, mimi tower and tower 32 ????
>
> I've not heard them called "mini" before, but I think the regular Tower 400
> was a 68000 machine with ST412 disk interface (the 'MSC' board) and a HPSIO-8
> board for serial.
sounds real close to the same. could be marketing here
that changes the model
> I've got a 700 model - '030 CPU, ECC memory, dual HPSIO-16 boards, Ethernet,
> HPMSC SCSI controller, system standby/suspend etc. They're not blindingly
> fast (Ethernet response is *really* sluggish), but they're nice enough
> machines in a "real computer" kind of way.
>
> > a Qic type Cartridge tape and comm board with 8 TTY ports
> > (all 15 pin) and 2 CPU ports (1 DB9 and 1 DB15).
>
> The DB15 is the console. The DB9 is for a remote diagnostic modem link (I'm
> not sure whether you can get a fully-functional console up on it, and I think
> it's stuck at 2400 baud)
>
> > The manuals don't say anything about the console port or
> > pin outs.
>
> Console pinouts:
>
> 1 TxD out
> 2 RTS out
> 3 DSR in
> 4 DTR out
> 9 RxD in
> 10 CTS in
> 11 sig gnd
> 12 DCD in
>
did not get a chance to try this tonight. Are the ports hard
wired for flow control ???
It always helps to look down the right hole i was just tring to
get anything to work. what looks right is not always true.
> Hazy memory says that it might expect 9600 baud, 7E1 by default. I might have
> the jumper settings for the serial board that you have - I can take a look if
> you want.
>
> I think the regular terminal lines might use the same pinouts on your machine
> (my 700 has 37-way connectors with four ports over each connector).
>
> > So does anyone have a boot tape
>
> Afraid not... I'd like to hear from anyone who has them too. I've got raw
> drive image backups of my machine, but it'd be nice to know that the install
> media was out there. I think there are two flavours of boot tape
> (unfortunately for me) - one that'll work with 400-6x0 machines, and one
> that's specific to the 700 (I've not sure about the 750 and 800).
>
> Note the if you have a BNC connector toward the bottom of the machine at the
> back, it's something to do with the power fail detection circuitry. It's not a
> Ethernet network connector and plugging it into one would result in
> interesting things happening :-)
>
thanks for the warning
> cheers
>
> Jules
Is there a listing for the 5 leds along the top of the mother
board. When it is in the run position and it get through
selftest only the Run LED stays stays on.
- Jerry
Hi,
I'm writing in respnse to a post you made on
http://www.classiccmp.org/pipermail/cctech/2006-August/066119.html
The SPOT card that you have is an interface card for a Scantak-2c Single
pass 24 bit Flatbed Color Scanner that was designred for windows 95.
The card wonlt do you much good without the scanner, as I'm pretty sure it's
a proproetary interface.
I hope you find this helpful.
_________________________________________________________________
See what you?re getting into?before you go there
http://newlivehotmail.com/?ocid=TXT_TAGHM_migration_HM_viral_preview_0507
Hello, I've got a VAXstation 3100 (Thanks, Peter Coghlan!) that I
recently acquired while on holiday in Ireland. There is a problem I'm
having with it - the 8-plane colour display controller is giving me an
error message on startup:
?? 4 00D0 0016.0052
When I run test 4 on the Chevron prompt I get:
>>> test 4
4?..
84 FAIL
and when I try test 50 I get
(...)
?? 8PLN 0016.0052
(...)
Does anyone know what could be ailing my new toy? The machine will run
perfectly using the mono adapter, though VMS 7.3 will crash hard when
trying to access the device (starting the X server).
Is there a list of these error messages, somewhere?
Thanks,
Tore
I picked this up at a hamfest last week. It may be about 10 years old :)
http://tinyurl.com/2vprxy
I need to start the long search for info and to get it going. Anyone
recognize it? It's made by NT Systems of Melbourne, FL, who appear to
be gone. Ports of the back suggest it hooked to the PC keyboard port
(AT-style DIN5,) but it could as easily have used a custom interface
card. Other ports are: power, keyboard, RS232/Modem, DB25 for rudder
pedals (marked "This is not a serial port,") There's no model number
that I can find. The gauges are fake, but they are surrounded by
membrane buttons. The yoke moves in and out on a hydraulic shaft.
The only thing I've found so far via Google is a Flight Sim 98 DOS
driver for some product of theirs, not necessarily that one.
Next stop, the flight sim forums, but thought I'd start here.
--
jht
On 8/21/07, Zane H. Healy <healyzh at aracnet.com> wrote:
> I'd guess it is specifically for Microsoft Flight Simulator.
Quite likely, since there wasn't much else for simulation on the PC
back then. I somehow missed the label on the bottom last time I
flipped it over. Unfortunately it was paper and most of it has rubbed
off, so no model#. It was made in 1995, though.
Any the power connector cracked off as soon as I touched it :(
I just happened to spot this on eBay while looking at something else.
A VAX 4000-108, in other words a VAX that looks like a DEC Alpha PWS.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130141799752
ELI only wants $8.5k for it, while they will see you a nice DS20E
dual 667Mhz system for $2.3k, even an ES45 with dual 1Ghz CPU's is
cheaper. :^)
At the same time this is the first photograph I've ever seen of one
of these systems. Somewhere I have the golden egg describing it.
Zane
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
| MONK::HEALYZH (DECnet) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |