I wrote:
> If a person has any reasonable business justification
On Mon, Aug 17, 2015 at 2:11 PM, Noel Chiappa wrote:
> But a lot of the people here don't; they're purely hobbyists. So spending
> $1K on a piece of test equipment just isn't realistic for them.
That's why I suggested the info was
In Realtime: We are barely halfway done
http://ascii.textfiles.com/archives/4711
They are still looking for volunteers tomorrow (Tuesday, August 18).
Anyone in or near Baltimore might want to go help.
Hi Nigel,
Thanks a lot for taking an interest and for posting this information.
The answer you got from the museum matches the original information I got, I
wasn't able to get anything further from there.
The chassis/backplane/card cages were actually quite interesting also, although
I guess it h
> The bearings were actually easy to replace, no special tools required.
> The hardest part was getting off the nut that was holding the spindle
> together.
Nothing to do with this drive (in fact I have never seen this in 8" drives)
but some direct drive 5.25" drives have a left hand thread screw
>
> Well, in the process of repairing the Altos power supply I managed to
> break the center lead off of the TIP31A that feeds the 2N3055 series
> pass transistor. This time, I need to order parts.
Do you? The centre lead (collector) is connected to the tab on that transistor.
So a
solder tag
I would've been game at that kind of price ... hopefully someone who can
appreciate them actually got them and will have some fun with them. Did
they sell?
Best,
Sean
On Mon, Aug 17, 2015 at 7:07 PM, William Donzelli
wrote:
> Not me.
>
> --
> Will
>
> On Mon, Aug 17, 2015 at 6:40 PM, Benjamin
Well, in the process of repairing the Altos power supply I managed to
break the center lead off of the TIP31A that feeds the 2N3055 series
pass transistor. This time, I need to order parts.
In the meantime, I swapped drives to make the problem more drive accessible.
Also, the Shugart 801 drive I
The bearings were actually easy to replace, no special tools required.
The hardest part was getting off the nut that was holding the spindle
together.
Other than that, the bearings side into place pretty easily (the top
one, which is the most critical, required the heel of my hand to press
it in p
On Mon, Aug 17, 2015 at 5:22 PM, Jay Jaeger wrote:
> Well, in the process of repairing the Altos power supply I managed to
> break the center lead off of the TIP31A that feeds the 2N3055 series
> pass transistor. This time, I need to order parts.
Isn't the center lead also the tab?
> Also, the
For shipping, use the proper screws to hold the printer.
I don't recall the proper size. If you don't, you may loose the H
coupler and damage the keyboard.
I also recommend removing the motor and shipping it in a third box.
It is so off balanced that the packing can shift.
Dwight
> > One thing though. No piece of test gear will do more than provide evidence
> > of
> > what the circuit is doing. It will not tell you 'U38 is faulty' or whatever.
>
> In principle that was where HP was trying to go with signature
> analysis back in the 1970s. The problem has since been solved
>> If a person has any reasonable business justification
>
> But a lot of the people here don't; they're purely hobbyists. So spending
> $1K on a piece of test equipment just isn't realistic for them.
Plenty of people will spend $1K on equipment for their hobbies. No, I do not
believe
that a
For real? That's just so cool!
And yes, this list has more than its share of extraordinary members. Just
today, after putting out a request for some Osborne boot media - not only
did half a dozen or more learned individuals respond to my questions, but
+two+ of them offered to locate and / or send
Hi John,
A testament to the extraordinary community that is classiccmp.
I
will certainly take you up on it, and get you a check, and/or some of
the other great junk lying around here. I'm pretty well equipped with a
good electronics lab. Do you need a scope? I have a few Tektronix
digital
@ Jay,
Ha, yeah.. I've seen a number of his vids.. Don't mean to offend, but he
comes off a bit squirrely (hyper) for me.
Yet another freaking Aussie nutcase, lol - but he does seem to get some
good info across, in between the audible glamour.
On Mon, Aug 17, 2015 at 9:54 PM, Jay Jaeger wrote:
On Mon, Aug 17, 2015 at 10:48 PM, Jay Jaeger wrote:
> The RLV11 was developed for the original LSI Bus. I'd expect it to be
> Q-Bus compatible, but others here probably have more recent exposure.
> It has been a while since I worked with an 11/23.
In 1987, all I could afford was a used 11/23 ($
You might check EEVBLOG on Youtube. The guy's a blast and covers what
you are asking about. He indicates 8 bits is really not to his liking
at all, to go for more. He also goes over the sampling rate of some of
the USB DSO's out there.
EEVBlog #13:
https://www.youtube.com/watch?v=JTG6jWL0ZqA
h
BR level is the bus request level for an Interrupt. BR 4 is typical.
The RLV11 apparently asserts BIRQ L, pin AL2 - which on the 11/23 would
be BIRQ4 L. I don't think the RLV11 offers any other choice.
The RLV11 print set (bitsavers) has the switch settings on page 4 of the
PDF.
The RLV11 contr
On 08/17/2015 08:54 PM, Terry Stewart wrote:
On Tue, Aug 18, 2015 at 1:45 PM, Fred Cisin wrote:
On Mon, 17 Aug 2015, drlegendre . wrote:
Terry & all,
To be clear - SD on a "360K" floppy is 180K? Yes?
NO.
Osborne SD was also single sided.
10 256 byte sectors per track. 100K.
"360K" was
NO.
Osborne SD was also single sided.
10 256 byte sectors per track. 100K.
[IBM PC] "360K" was 9 512 byte sectors, with TWO sides used.
On Tue, 18 Aug 2015, Terry Stewart wrote:
Hmm. I don't have the machine in front of me to check (I'm at work), but I
pretty sure my Osborne 1A drives are sin
At 04:12 PM 8/16/2015, Marc Verdiell wrote:
>Thanks Al, I downloaded the assembler just in case. And to Chuck's point, it
>always felt like the MSDN distribution was a poorly documented, disorganized
>mess.
Good thing so many of us kept it all.
- John
On Tue, Aug 18, 2015 at 1:45 PM, Fred Cisin wrote:
> On Mon, 17 Aug 2015, drlegendre . wrote:
>
>> Terry & all,
>> To be clear - SD on a "360K" floppy is 180K? Yes?
>>
>
> NO.
> Osborne SD was also single sided.
> 10 256 byte sectors per track. 100K.
>
>
> "360K" was 9 512 byte sectors, with TWO
On Mon, 17 Aug 2015, drlegendre . wrote:
Terry & all,
To be clear - SD on a "360K" floppy is 180K? Yes?
NO.
Osborne SD was also single sided.
10 256 byte sectors per track. 100K.
"360K" was 9 512 byte sectors, with TWO sides used.
> On Aug 17, 2015, at 7:29 PM, Dave G4UGM wrote:
>
>> -Original Message-
>> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of
>> drlegendre .
>> Sent: 18 August 2015 00:15
>> To: General Discussion: On-Topic and Off-Topic Posts
>>
>> Subject: Re: test equipment / Re: Z80
Terry & all,
To be clear - SD on a "360K" floppy is 180K? Yes?
Also, what's meant by a "1a"? My mainboard is marked "Rev A" but the
machine was made in late 1982, so I have a hard time believing it's really
the original Ver. A that shipped in the very early units. The board & parts
compliment end
On 8/14/15 21:19, couryho...@aol.com wrote:
> think dcc made a fake dg nova also!?
They did; much like the Keronix clone it offered the option of
addressing twice as much logical memory by limiting memory reference
indirection to one level. I actually have one sitting in my to-restore
queue.
-
only think that worries me is some guy in the suv takes a liking to
it and "opps" he says " someone took it when I was in the restaurant!"
Ed#
In a message dated 8/17/2015 4:25:49 P.M. US Mountain Standard Time,
rdawso...@hotmail.com writes:
Thanks Cory,
I listed it with UShi
I have a Compaq PIII as well, and I do have bootable DOS media for it. Not
sure which vers. are available. There's also a bootable ELKS distro disk
(Linux of sorts, for 286). That might be of some utility?
I don't recall - does the Port III have a HD? I can't remember, but I get
the feeling it doe
>I've got this hazy memory saying that the boot area (or possibly just the
first track?) of the 'DD' CP/M disk might still be FM, though, even
>though the rest of the disk isn't, and so it needs a FM-capable controller
to write out an image. Maybe I'm mixing that up with a different system,
though.
Guys. Slow down. It is not a cable error. It is not a terminal error. If the
system also had the card already installed before it is also not an
installation error. It is also probably not an interrupt error.
I can go into more details behind the reasoning for this if people are
interested.
Hol
On 08/17/2015 06:25 PM, drlegendre . wrote:
Gents,
Do remember that I'm fairly confident this is a DD machine (the described
daughterboard and v1.4 ROM are present)
Indeedy... :)
so the ability to write +SD+ might
not be of concern. It would be nice if the PC could do both, though..
I've g
On 08/17/2015 04:09 PM, Fred Cisin wrote:
There are plenty of PCs that can run ImageDisk and/or Teledisk that
CAN NOT do single density (FM). Neither of those pieces of software
alter the hardware capabilities of the machine.
It's odd, but later PC floppy support is often better in the FM sup
>
> Date: Mon, 17 Aug 2015 01:29:27 -0400
> From: Evan Koblentz
> Subject: MARCH's Straight 8 restoration notes
>
> The RICM PDP-12 thread made me realize that I (nor I think David
> Gesswein) ever posted our PDP-8 notes here. (We did post a link to the
> Youtube video of the ceremony at VCF East.
On Mon, 17 Aug 2015, Chris Osborn wrote:
On Aug 17, 2015, at 3:44 PM, drlegendre . wrote:
Any sense of what PC models / controllers are capable of this task?
Anything that will run ImageDisk or Teledisk will work. It doesn?t
necessarily have to be one of those computers, you could pull the
I wonder if someone can help with a bit of a problem I have.
I have a compaq portable 3 system which has a working Pick (Non dos)
system on it.
It has the 5 1/4" floppy drives on it. I am looking for a bootable
floppy or 2 with something like dos 6.x on it and some utility that can
read and
I would absolutely not ship laying on its side! It is easy to remove unit
from pedistal (4 screws), then ship in two boxes. I have shipped 5 or 6
this way.
Bill
Bill Degnan
twitter: billdeg
vintagecomputer.net
On Aug 17, 2015 7:25 PM, "Randy Dawson" wrote:
> Thanks Cory,
>
> I listed it with U
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of
> drlegendre .
> Sent: 18 August 2015 00:15
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: test equipment / Re: Z80 / Z84C Swap (Doh!)
>
> Hey Dave & All,
>
> Could you give a
Thanks Cory,
I listed it with UShip, and will wait to see what happens.
This was a great idea, I never heard of such a 'crowd-sourced' shipping service
before.
Randy
> Subject: Re: Freight recommendation for a teletype?
> From: coryheisterk...@gmail.com
> Date: Mon, 17 Aug 2015 17:33:38 -050
Gents,
Do remember that I'm fairly confident this is a DD machine (the described
daughterboard and v1.4 ROM are present), so the ability to write +SD+ might
not be of concern. It would be nice if the PC could do both, though..
So is there a difference between SD and DD CP/M - Osborne disk images?
Hey Dave & All,
Could you give a little quick kick-start guide to bit depth & sampling rate
on DSOs? It's always kind of stumped me, not that I've ever read deeply
into it.. but how is it that you can get any kind of (vertical, right?)
resolution out of 8 or even 12-bit samples?
Example line of t
Any sense of what PC models / controllers are capable of this task?
On Mon, 17 Aug 2015, Chris Osborn wrote:
Anything that will run ImageDisk or Teledisk will work. It doesn’t
necessarily have to be one of those computers, you could pull the 360k
drives from one of them and hook them into a “ne
Not me.
--
Will
On Mon, Aug 17, 2015 at 6:40 PM, Benjamin Huntsman
wrote:
> Anyone here pick up the two MP3000's on PublicSurplus for $99/ea?
On Aug 17, 2015, at 3:44 PM, drlegendre . wrote:
> Any sense of what PC models / controllers are capable of this task?
Anything that will run ImageDisk or Teledisk will work. It doesn’t necessarily
have to be one of those computers, you could pull the 360k drives from one of
them and hook the
Any sense of what PC models / controllers are capable of this task? Despite
my recent comments to the contrary, I just recalled that I do, in fact,
have a few old and (iirc) working PCs around here.
Here's what I think I have available. Please - anyone who might know - tell
me if one will fit the
Anyone here pick up the two MP3000's on PublicSurplus for $99/ea?
On 08/17/2015 03:26 PM, Randy Dawson wrote:
Hi Classiccmp,
I just purchased a ASR 33 teletype and now stuck with the problem of
getting it here, its in Wisconsin and I am in LA.
Its pickup, the owner will not pack and ship.
Do you know of a freight company that will put it on a pallet, band
it
Holm Tiffe wrote:
>
> Please give me a hint how exactly I should setup a line, no problem for me
> on unix with stty ..but I don't know much about VMS...
>
I've never seen this particular arrangement so I am just guessing here, based
on experience with other VAX terminal setups. The terminal set
Randy,
One option might be UShip. These are best transported laying down once the
paper and tape spindles are removed and preferably, that shipping screws anchor
down the chassis (though I have moved them without). With UShip, you set an
asking price with parameters, such as blanket wrap, or co
Hi Classiccmp,
I just purchased a ASR 33 teletype and now stuck with the problem of getting it
here, its in Wisconsin and I am in LA.
Its pickup, the owner will not pack and ship.
Do you know of a freight company that will put it on a pallet, band it with
care and take care of the shipping?
R
Sorry if some of the suggestions aren’t appropriate, was just throwing a few
things out.
$analyze/error/since=today/full/include=tx
Can you post a sample of the output for one of the lines that has an error?
Regards,
Jerry
> On Aug 17, 2015, at 4:11 PM, Holm Tiffe wrote:
>
> Jerry Weiss
On 08/17/2015 03:31 PM, drlegendre . wrote:
Hey Jules,
Ah, so your O1 also has the weird screen artifacts prior to hitting
'return'? Weird.. wonder what's up with that?
No, sorry! I meant the "boot error" scrolling up the screen (e.g. it's not
the result of some kind of stuck key fault or any
Now that I (hopefully) have my PDP 11/23 running (it passes CPU and memory
tests, anyway), I've been messing with my RLV11 so I can use my RL02.
For a first step, I'm trying to run the VRLBC0 diskless diagnostic to check
the controller. I checked that the address and vector switches are set to
the
Jay Jaeger wrote:
> On 8/17/2015 1:18 PM, Holm Tiffe wrote:
>
> > Johnny Billquist wrote:
> >
> > [..]
> >>>
> >>> Since I'm a total VMS Noob I now have some Questions:
> >>>
> >>> .. have I missed something?
> >>> .. is the CXY08 bad?
> >>> .. what could I try next?
> >>> ...is there some diagn
Jerry Weiss wrote:
> A few quick thoughts:
>
> 1) Bad non-name USB/Serial converter. I have one that won?t speak to a MVII
> console or certain non-DEC DLV11J cards
...sorry, USB in a DEC VT420 _and_ an Bull Compuprint 970?
(http://www.computer-makarow.de/images/product_images/popup_images/431
On 8/17/2015 1:18 PM, Holm Tiffe wrote:
> Johnny Billquist wrote:
>
> [..]
>>>
>>> Since I'm a total VMS Noob I now have some Questions:
>>>
>>> .. have I missed something?
>>> .. is the CXY08 bad?
>>> .. what could I try next?
>>> ...is there some diagnosting software for the CXY08 existing for
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Noel
> Chiappa
> Sent: 17 August 2015 21:12
> To: cctalk@classiccmp.org
> Cc: j...@mercury.lcs.mit.edu
> Subject: Re: test equipment / Re: Z80 / Z84C Swap (Doh!)
>
> > From: Eric Smith
>
> >
The DSO has been high on my want list for some time now.. But that said, I
made it through several Commodore machines & drives, the CRT display on the
Osborne Vixen, the Altair rebuild, several Macs and on, with what I do have
on-hand.
Lacking a DSO didn't prevent me from getting through that stuf
Just so you know, you can boot an Osborne 1 from the B: drive by
pressing " (shift and double-quote) instead of .
Mike Loewen mloe...@cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
On Mon, 17 Aug 2015, drlegendre . w
Hey Jules,
Ah, so your O1 also has the weird screen artifacts prior to hitting
'return'? Weird.. wonder what's up with that?
I've only detected activity from drive A (LH side). It definitely does
spin, the LED lights up, but I haven't been able to detect any head
movement. You mention that the he
A few quick thoughts:
1) Bad non-name USB/Serial converter. I have one that won’t speak to a MVII
console or certain non-DEC DLV11J cards
2) LED Analyzer is pulling too much current on the lines
3) Bad +-15 volt converter on board.Do you see any activity on control
signals or send line? T
On 08/16/2015 09:48 PM, drlegendre . wrote:
I placed a disk in Drive A and upon pressing RETURN the display immediately
stabilized and went into a loop printing "BOOT ERROR" on successive lines,
eventually scrolling the original boot message off the top of the display.
Hey,
I dug out that mach
>From my inspection, it seems that this machine does have the DD option. The
tech manual mentions that the DD upgrade includes a small daughterboard
mounted on the mainboard, and the v1.4 ROM, which I assume contains the DD
driver code in the BDOS. Both a daughterboard (with a data cable to the
flo
On Mon, 17 Aug 2015, Noel Chiappa wrote:
> From: Eric Smith
> If a person has any reasonable business justification
But a lot of the people here don't; they're purely hobbyists. So spending
$1K on a piece of test equipment just isn't realistic for them.
Having said that, I do see some D
> From: Eric Smith
> If a person has any reasonable business justification
But a lot of the people here don't; they're purely hobbyists. So spending
$1K on a piece of test equipment just isn't realistic for them.
Having said that, I do see some DSO's on eBay for not much money (e.g. the
On Mon, Aug 17, 2015 at 1:54 PM, tony duell wrote:
> One thing though. No piece of test gear will do more than provide evidence of
> what the circuit is doing. It will not tell you 'U38 is faulty' or whatever.
In principle that was where HP was trying to go with signature
analysis back in the 197
On Mon, Aug 17, 2015 at 1:37 PM, Brent Hilpert wrote:
> I suffered with a low-end Tek analog scope until a few years ago; have been
> using a Tek DSO for the last few years.
>
> While there are occasions I'd like to have an LA, I can't say there are any
> instances where I've had to have an LA (
> From a usefulness perspective I'd get a DSO long before an LA.
What you use is a personal choice IMHO.
I've used DSOs (never owned one), both HP and Tektronix and never really liked
them. I use
an analogue 'scope only rarely in classic computer repair. But my (many) logic
analysers
are used
On 2015-Aug-17, at 3:32 AM, Noel Chiappa wrote:
>> From: drlegendre
>
>> Sigh.. and here I sit, yet again, with neither a logic analyzer
>
> I've bought Tek 1240's (which are really nice units, although of course
> without the capabilities of today's - but still a lot more powerful than the
> ear
Glen Slick wrote:
> You don't say so asking just to be sure, are you using standard BC19N four
> port breakout cables with the CXY08?
Yes, BC19N-12 is the label..
Regards,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Freiberger Straße 42, 09600 Oberschöna, USt
The Executive shipped with CP/M Plus 3.0, in SSDD format. The Osborne
1 required a double-density option to read DD disks. I don't recall that
the CP/M Plus 3.0 would even run on the Osborne 1, at least not on my
systems. Depending on whether the double-density option is installed on
hi
You don't say so asking just to be sure, are you using standard BC19N four
port breakout cables with the CXY08?
Sean Caron wrote:
> Have you tried just a "quick-n-dirty" serial cable with only TXD, RXD and
> GND wired? Sometimes trying to accommodate all those modem control lines
> will just lead you down the rabbit hole ... Just a thought.
>
> Best,
>
> Sean
>
>
Yes, tried this with XON/XOFF setting o
On Mon, Aug 17, 2015 at 11:40 AM, Sean Caron wrote:
>if you put a 5V CMOS Z80 in there, I wouldn't expect it to
> really hurt anything; it might not run exactly right depending on
> tolerances in the system design I would suspect mostly due to (a) logic
> threshold differences and (b) fan-out diff
From: Jay Jaeger
Sent: Sunday, August 16, 2015 3:18 PM
On 8/16/2015 9:00 AM, Michael Thompson wrote:
>> We did a lot more debugging on the TC12 LINCtape controller.
> Second gut hunch is that it would be hard to see how the drive could
> cause this UNLESS the TC12 uses one side of the redundant
You should be able to get a replacement NMOS Z80 from Jameco for four or
five bucks ... if you put a 5V CMOS Z80 in there, I wouldn't expect it to
really hurt anything; it might not run exactly right depending on
tolerances in the system design I would suspect mostly due to (a) logic
threshold diff
Have you tried just a "quick-n-dirty" serial cable with only TXD, RXD and
GND wired? Sometimes trying to accommodate all those modem control lines
will just lead you down the rabbit hole ... Just a thought.
Best,
Sean
On Mon, Aug 17, 2015 at 1:40 PM, Johnny Billquist wrote:
> On 2015-08-17 19
Johnny Billquist wrote:
[..]
> >
> >Since I'm a total VMS Noob I now have some Questions:
> >
> >.. have I missed something?
> >.. is the CXY08 bad?
> >.. what could I try next?
> >...is there some diagnosting software for the CXY08 existing for VMS
> >and if yes, where can I get it?
> >
> >Th
On 2015-08-17 19:33, Holm Tiffe wrote:
Hi guys,
I'm fiddeling around for hours now to get an M3119-YA CXY08
Multiplexer to work in my VAX4000/300 on VMS7.3.
The Card is properly detected it seems..
Device Device Error
Name Status Count
Hi guys,
I'm fiddeling around for hours now to get an M3119-YA CXY08
Multiplexer to work in my VAX4000/300 on VMS7.3.
The Card is properly detected it seems..
Device Device Error
Name Status Count
FTA0: Offline
On 8/17/2015 12:48 AM, drlegendre . wrote:
> Thanks for the input, gents..
>
> Sigh.. and here I sit, yet again, with neither a logic analyzer nor a
> decent digital scope. Unless something comes up, looks like I'll have to do
> it the hard way, as usual - heh.
>
Do you at least have a logic pr
* Ali [150816 18:27]:
> Wow, I know it's not a DEC PDP but I was hoping at least a few people used
> the darn thing. Would it be better if I post in VCF? Thanks for any input.
> -Ali
I have the boards available for sale (I do a board run and keep some
around in case someone wants them) but haven
> From: Ali Fahimi
> Wow, I know it's not a DEC PDP
Hah! Don't feel too bad. I've lost count of the number of PDP-11 questions
which I've brought here, only to hear a resounding silence (most recent case
on point, my query about Clearpoint DCME/Q4E's).
Noel
> From: drlegendre
> Sigh.. and here I sit, yet again, with neither a logic analyzer
I've bought Tek 1240's (which are really nice units, although of course
without the capabilities of today's - but still a lot more powerful than the
earliest LA's) on eBay for as little as $25 (albeit wit
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