Christos,
> I would like to do a bad sector scan on a RD52 connected to a RQDX1
> controller (The machine is a pdp11/73 without OS) prior to installing
> BSD2.11.Is there a standalone program like zrqch0(standalone
> version of zrqc from the xxdp package - only for RQDX3) that can be
> downloaded directly to the pdp via vtserver and recognizes the RQDX1,
> i.e. a version of zrqb or something similar?
In "XXDP V2.5 Notes" (http://www.chd.dyndns.org/pdp11/xxdp25.notes.txt)
I read the following:
ZRQA RQDX or RUX50 RD/RX EXERCISER
ZRQB RD51/52 DISK FORMATTER RQDX1 DISK DRIVE SUBSYSTEM
ZRQC Formattable Winchester (RDnn) or Floppy (RX33) Drives RQDX3 Disk Formatter Utility
ZRQD RQDX or RUX50 RD/RX EXERCISER
ZRQE RQDX3 EXERCISER
ZRQF RQDX3 RX33 Format Utility
ZRQG RQDXn RD/RX Disk Summary Diagnostic
Now, although my knowledge of XXDP is minimal, the above would make me
believe that ZQRB works with the RQDX1 (only), and that the ZQRC is the
one that only works on the RQDX3.
Anyone know more about this?
--f
Any one to avoid? It'll end up in an Axil SS2 clone routing a broadband
connection into the FDDI backbone, unless someone can convince me that it's
a horrible idea.
Thanks!
Bob
>> To my knowledge the largest hard drive platter was 24".
>
> Platters of at least 36" diameter have been made; they were used
> on ILLIAC IV.
hmm, that's sounds about the right size. I remember the lecturer standing
behind the platter and it came up to around waist height, which is where I got
the 1m estimate from.
thanks to all for the thoughts!
Jules
Everything you'll ever need on one web page
>from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
I picked up one of these today and it had multiple problems but I finally got it to boot but so far I can't get a display on the built in screen. I'm not sure but I'm wondering if the switch settings on it are correct. Does anyone have the switch settings for one of these?
Joe
Joe <rigdonj(a)cfl.rr.com> wrote:
> I just bought this
> <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=25399&item=2507112537>
> off of E-bay. Obviously it's some kind of disk drive tester. I
> opened it up and the entire front panel is hand wired but I also
> found a commercail circuit board in it. On the board it says "MFD
> Checker II" "Sony" "Made in Japan". Does anyone know anything about
> a MFD checker?
Um, I'm thinking Sony diskette drive part numbers start(ed?) with MFD.
Yep, it looks to me like you got yourself a drive tester.
That wouldn't get me so excited as to forget to hit return once in
a while, but I guess it means you have a new way to play with
the stiffy drives in all that HP gear. Congratulations!
-Frank McConnell
Hey guys!
You may want to check out the Computer News 80 website at
www.cnpublishing.com for information on software for the TRS80, as well
as TRS80 Model 4s for sale etc.
-- Frank
On Feb 20, 10:45am, Al Hartman wrote:
> Subject: Re: DosPlus for the Model IV
> > Does anyone have a copy of DOS-Plus for the TRS
> > model 4 that they can send me? I picked up a 4 last
> > weekend with no SW or docs and I already have
> > DOS-Plus SW and manuals for the model 1.
> >
> > Joe
>
> Joe,
>
> I don't have DosPlus for the Model IV that I know of
> (I might, somewhere..). But, I can recommend highly
> Multidos for the Model IV.
>
> I don't have the link handy, but if you search for it,
> you can find it.
>
> It's still availble for purchase in the $30.00 range
> last time I checked, and it is an Alternate OS for the
> TRS-80 that incorporates a lot of the strong points of
> DosPlus, including 80 Column support while in non CP/M
> mode.
>
> It's a nice OS, and the DISK BASIC is faster and
> smaller and more feature rich than most of the other
> ones available for the TRS-80.
>
> I remember porting my Copy of Connection-80 over to it
> (we renamed our custom version, Nybbles-80), and it
> was MUCH faster under Multidos than under Newdos/80,
> TRS-DOS or DosPlus, and I was able to take advantage
> of several MultiBASIC features to make it nicer...
>
> Boy, those were the days.
>
> I'm on the lookout for an LNW-80 Computer that works
> to set up a system again. I'm going to keep watch in
> April at the Trenton Computer Festival for a Model IV
> or Model III in the Flea Market.
>
> Regards,
> Al
>
>-- End of excerpt from Al Hartman
--
==== M O N T V A L E S O F T W A R E S E R V I C E S P. C. ====
Clayton Frank Helvey
President
Montvale Software Services, P. C.
P.O. Box 840
Blue Ridge, VA 24064-0840
United States of America
Phone 540.947.5364
===================================================================
In a message dated 2/20/03 8:35:48 PM Pacific Standard Time,
rigdonj(a)cfl.rr.com writes:
>
>
> Do you have a Sony checker? If so, what's this about *70* track drives?
> I already have a nice Brikon 723 drive tester made by Brian. I'm not sure
> if it handles the 600 RPM drives but it does handles 3", 3.5", 5 1/4" and
> 8" drives!
>
You are very lucky to get a Sony tester. IIRC the early Sony drives were very
nonstandard and there were several different kinds. I am sure the 70 track
goes back to the very earliest Sony floppies there are others on the list
that can address this better than I.
I can't remember who made the Hard drive tester that I have. I got several
>from Intel when they were getting rid of the 310 stuff. It covered most of
the early MFM hard drives and was built in a small blue box about 12" square.
A standalone process selected from a menu of drives, plug in the drive, after
a while a report was printed out. The name started with an A and was three
letters. IIRC. It is close to the surface in the storage locker so I will
note when I get there.
You got a nice find. Hang on to it.
Paxton
Astoria, OR
I need a power supply for an Atari 400 computer and have the following to
choose from. Does anyone know which if any to use with the 400:
Atari Power Supply Model CO 14319
IP 120vac 60hz 18.5w OP 9vac 15.3va
Atari Power Supply Part Number C010472
IP 120v 60hz 9w OP 9v dc 500ma
Atari Power Supply part number C016804
IP 120v 60hz OP 9vac 31VA
Atari Power Supply part number C017945
IP 120v 60hz 50w OP 9vac 31VA
Atari Power Supply part number CA14748
IP 120v 60hz 20w OP 15VA
Atari Power Supply part number C016353
IP 120v 60hz 11w OP 9v DC 500ma
for Atari 2600
Atari Plug In Power Supply - Part Number C061515
IP 120vac 60hz 7.5va OP 9vac 500ma
Atari Power Supply part number C018187
IP 120vac 60hz 38va OP9.3vdc at 1.95A
Just the thing needed to check out those sony drives in the old HP equipment.
Congratulations, Joe, you have a floppy drive tester for early Sony 3 1/2
inch floppys.
I have a similar hard drive tester.
Paxton
Astoria, OR
I've put together some pictures of parts of my collections of various
things that I figured I'd brag about^H^H^H^H^H^H^H^H^H^H share with
everyone on this list :-)
There are pictures of various DEC PDP's, tons of pictures of boards,
some antique test equipment, and some antique electronic calculators.
My question is, does anyone have schematics for any of the non-DEC
equipment? Specifically, GR1683, HP3440/3445, HP9100, and Tektronix 909?
If so, please let me know! I'd be happy to host PDFs or GIFs or
whatever form they might take...
Here are the URLs:
PDPs:
http://www.parse.com/~pdp8/
Other:
http://www.parse.com/~rk/collecting/
Enjoy!
Cheers,
-RK
--
Looking for Digital Equipment Corp. PDP-1 through PDP-15 minicomputers!
Robert Krten, PARSE Software Devices +1 613 599 8316.
Realtime Systems Architecture, Consulting and Training at www.parse.com
>I'm a U.S. citizen (well, I might not be after the SS, Shrubs Spooks,
>reads this... they might revoke my citizenship, even though my
>ancestors came over here several hundred years ago)
You know, I was just thinking about that myself. What would they do with
someone like me, who's ancestors predate the US being here?!? I can get
that someone who is a naturalized citizen they can kick back to whatever
country they came from... but what are they going to do to me? Kick me
back to Virginia? (one of my older ancestors was the given the Virginia
colony to run)
>The U.S. military had no right to do that, whether
>overseas or over here... anyone who lands on someone's _private
>property_ and then has the audacity to order the owners to leave, as
>well as ordering people living in neighboring properties to leave,
I don't know about Australia, but I suspect if you dig thru the laws,
there is some exclusion here in the US that does allow for this. I base
that on the fact that in the fire service we DO have the right to evict
people from an area in the name of safety. For instance, if we have a gas
main break, we can go house to house and forcably remove people in the
effected area if we feel that their life is in danger. They don't have to
consent, and we don't need a court order (although I suspect if we did it
without damn good reason, we could probably be sued later).
We can also keep custody of the property until we are "finished" with the
scene. Here in NJ that is defined as the reasonable amount of time to
handle the event and any followup investigation OR until the last EMS
person leaves the scene, whichever happens first.
-chris
<http://www.mythtech.net>
Does anyone have a copy of DOS-Plus for the TRS model 4 that they can send me? I picked up a 4 last weekend with no SW or docs and I already have DOS-Plus SW and manuals for the model 1.
Joe
The original IBM RAMAC disk platters were several feet across:
"The 350 Disk File consisted of a stack of fifty 24" discs that can be seen
to the left of the operator in the above picture. The capacity of the entire
disk file was 5 million 7-bit characters, which works out to about 4.4 MB in
modern parlance. This is about the same capacity as the first personal
computer hard drives that appeared in the early 1980's, but was an enormous
capacity for 1956. IBM leased the 350 Disk File for a $35,000 annual fee."
The Control Data 808 disk drive also used platters that were at least thet
large.
Anyone in Europe (or elsewhere) care to join us?
Later --
Glen
0/0
From: Peter Liebert-Adelt <P.Liebert(a)t-online.de>
To: Glen Goodwin <acme(a)ao.net>
Subject: [zx81] ZX81 users meeting in four weeks
Date: 02/20/2003 5:20 PM
> Hi ZX81 users
>
> May be it's a litte bit far away from you, but you should know:
>
> 7th ZX-TEAM-meeting will take place from friday, 21st of march 2003 at 18.oo
> pm)
> local time, until sunday 23rd of march 12.00 (noon) in the heart of Germany
> in a little village called Dietges, which is loacted near the town of Fulda.
> For more informations please mail or vistit our homepage: http://www.zx81.de
>
> Good by(t)e, "sinclairly" yours
>
> Peter
>
>
> ----------- ZX81 MAILSERVER INFO ------------------------------------
> To WRITE a new message, send your message to mailto:zx81@jarasoft.net
> To UNSUBSCRIBE send a message to mailto:listserv@jarasoft.net
> with "unsubscribe zx81" in the SUBJECT of your message.
> To SUBSCRIBE send a message to mailto:listserv@jarasoft.net
> with "subscribe zx81" in the SUBJECT of your message.
> ---------------------------------------------------------------------
Hey Joe (and listmembers) --
You and I discussed this on the phone today, but just for the general
edification of the listmembers:
If you need *any* kind of software for TRS-80s, check out www.trs-80.com.
All of the major OSes are there, as well as manuals, emulators, etc.
Later --
Glen
0/0
> Does anyone have a copy of DOS-Plus for the TRS model 4 that they can send
> ? I picked up a 4 last weekend with no SW or docs and I already have DOS-Plus
> and manuals for the model 1.
>
> Joe
We had several Victor 9000's. They ran CP/M and a proprietary MS-DOS. They
had built-in codec. They actually predated the IBM PC back in 1980. They
were the best available computers at the time, when the TRS-80 was
prevalent on the market. My dad still may have one on his closet shelf. I
threw mine away when I bought my first PC clone, a 4mhz, 4 mb ram 386SX.
I just randomly remembered the other day that when I was at uni one of the
computing lecturers one day rolled out an enormous disk platter to demonstrate
how hard disk technology has changed over the years.
The platter was pretty huge - around 1m in diameter. Any ideas as to what
system it may have come from?
Im just curious really - I've not seen much really old hardware up close, but
the impression I got from the pictures I've seen is that drive technology
didn't typically use platters *that* large.
(and hell, this beats talking about the war :)
cheers
Jules
Everything you'll ever need on one web page
>from News and Sport to Email and Music Charts
http://uk.my.yahoo.com
Owen: the RC25 are DEC's attempt at creating funny things.
They are MSCP disks (connect to UDA50 or KDA50) with an SDI
bus. They are actually two drives in a single coffin- one
winchester drive (13MByte) and a removable cartridge drive,
also 13MB. So, one could back on the winchester to the
removable, and so on.
I have one here.. just no cartridge.
--f
> -----Original Message-----
> From: Owen Robertson [mailto:univac2@earthlink.net]
> Sent: Wednesday, February 19, 2003 6:26 PM
> To: Classic Computer Mailing List
> Subject: DEC RC25 Drives
>
>
> A few weeks ago, I got a rather nice PDP-11/34 (34A, turnkey
> front panel)
> from a scrap yard. They had two identical systems being used
> in some sort of
> electronic testing devices. I only got one system because the
> other one
> looked like it had been hit by a forklift a couple times. It
> wasn't in great
> shape, so I salvaged some cards from it (CPU, memory, DELUA, drive
> controller, UNIBUS utility stuff...).
>
> My system is in very nice shape though. And along with the
> CPU, I also got
> two RC25 drives, along with controllers and cables. I've
> never seen these
> before. Can anyone tell me anything about them? They look
> like nice drives,
> but I've never really heard much about them.
>
> Anyway, this will be my third 11/34. Of the other two, I
> still have (and
> very much like) one, and one has been passed on to another
> list member.
> Anyway, more questions on recent acquisitions to come
> shortly, I'm sure.
>
> --
> Owen Robertson
But note that the Climet claim is qualified by "a box in which a phone
handset could be placed". How were the Bell modems interfaced?
-----Original Message-----
From: Eric Smith [mailto:eric@brouhaha.com]
Sent: Thursday, February 20, 2003 2:16 PM
To: cctalk(a)classiccmp.org
Cc: allain(a)panix.com
Subject: Re: FYI: 25th Anniversary of Ward Christensen's BBS
I wrote about (binary) data transfer by modem:
>> At least as early as 1965 IBM sold equipment that could do this,
John Allain wrote:
> Some more date/a:
> ""the first model of the first commercial modem," a box in which a phone
> handset could be placed, allowing a computer to say "beep beep" to
> another over long distances. Lee was almost right. He actually had the
> second model of the "magnetic/acoustic coupler," manufactured for
> Tymshare, Inc. by Climet Instruments about 1966"
> --
> http://membres.inforoots.org/dguardiola/Lee_Felsenstein/CMP-mails.htm
The Bell 103A modem was introduced in 1962. I suspect that it was the
first commercial modem.
The date that's harder to place is when the 103A was first used for
computer-to-computer data transfer, as opposed to teletype-to-teletype
or teletype-to-computer communication.
> Does anyone have a copy of DOS-Plus for the TRS
> model 4 that they can send me? I picked up a 4 last
> weekend with no SW or docs and I already have
> DOS-Plus SW and manuals for the model 1.
>
> Joe
Joe,
I don't have DosPlus for the Model IV that I know of
(I might, somewhere..). But, I can recommend highly
Multidos for the Model IV.
I don't have the link handy, but if you search for it,
you can find it.
It's still availble for purchase in the $30.00 range
last time I checked, and it is an Alternate OS for the
TRS-80 that incorporates a lot of the strong points of
DosPlus, including 80 Column support while in non CP/M
mode.
It's a nice OS, and the DISK BASIC is faster and
smaller and more feature rich than most of the other
ones available for the TRS-80.
I remember porting my Copy of Connection-80 over to it
(we renamed our custom version, Nybbles-80), and it
was MUCH faster under Multidos than under Newdos/80,
TRS-DOS or DosPlus, and I was able to take advantage
of several MultiBASIC features to make it nicer...
Boy, those were the days.
I'm on the lookout for an LNW-80 Computer that works
to set up a system again. I'm going to keep watch in
April at the Trenton Computer Festival for a Model IV
or Model III in the Flea Market.
Regards,
Al
I would like to do a bad sector scan on a RD52 connected to a RQDX1
controller (The machine is a pdp11/73 without OS) prior to installing
BSD2.11.Is there a standalone program like zrqch0(standalone version of
zrqc from the xxdp package - only for RQDX3) that can be downloaded
directly to the pdp via vtserver and recognizes the RQDX1 , i.e. a version
of zrqb or something similar?
Aw, come on, Joe! Enlighten the guy!
(I know too)
Glen
0/0
> At 09:57 AM 2/19/03 -0500, you wrote:
> >Hello,
> >
> > Do you know if it is possible to install a 1.44MB floppy drive in a Zenith
> >100?
> >
> > Thank you.
> >
> > Ken.
> >
>
> Yes I know.
>
> Joe