> On Oct 19, 2016, at 2:41 PM, Eric Smith wrote:
>
> In the US, the 2020 was sold with a NEMA 5-20P plug, so 120V at less than
> 20A,
Less than 16, in fact. NEC requires branch circuits to be loaded to at most
80% of the circuit breaker setting, so 16 amps on a "20 amp" circuit.
pau
In the US, the 2020 was sold with a NEMA 5-20P plug, so 120V at less than
20A, but likely more than 15A for a maximum configuration.
Of course, that's only for the actual 2020 box, and does not include disk
and tape drives, terminals, printers, card readers or punches, etc.
From: Noel Chiappa
Sent: Wednesday, October 19, 2016 8:49 AM
>> From: Rich Alderson
>> Yes, the d/r card is strictly level conversion, and the microcode in
>> the Xilinx does all the Massbus protocol.
> So if you don't mind continuing to indulge my curiousity (thanks for all
> the indulgence so
> From: Rich Alderson
> Yes, the d/r card is strictly level conversion, and the microcode in
> the Xilinx does all the Massbus protocol.
So if you don't mind continuing to indulge my curiousity (thanks for all the
indulgence so far :-), is the D/R card a daughtercard that mounts on th
On Wed, Oct 19, 2016 at 7:44 PM, Pontus Pihlgren wrote:
> On Tue, Oct 18, 2016 at 06:26:06PM +, Rich Alderson wrote:
>>
>> There have been 2 generations of Massbus Disk Emulator (MDE) at LCM. The
>> one of which people have seen pictures was the first generation, created
>> when there were on
On Wed, Oct 19, 2016 at 02:08:37AM -0500, Paul Anderson wrote:
> That should be in the site prep documents, or the installing documentation.
Certainly, I think I've even looked it up. But I was curious if LCM has
measured their specific configuration.
/P
That should be in the site prep documents, or the installing documentation.
On Wed, Oct 19, 2016 at 1:44 AM, Pontus Pihlgren
wrote:
> On Tue, Oct 18, 2016 at 06:26:06PM +, Rich Alderson wrote:
> >
> > There have been 2 generations of Massbus Disk Emulator (MDE) at LCM. The
> > one of which
On Tue, Oct 18, 2016 at 06:26:06PM +, Rich Alderson wrote:
>
> There have been 2 generations of Massbus Disk Emulator (MDE) at LCM. The
> one of which people have seen pictures was the first generation, created
> when there were only 2 people working on the collection which became the
> museum
From: Noel Chiappa
Sent: Tuesday, October 18, 2016 11:51 AM
>> From: Rich Alderson
>> Data was transferred via FTP over a 100baseT crossover cable connected
>> to a Slackware server; the Rabbit was able to keep up with 4 drives at
>> this speed
> Were the bits actually stored on the Slackware se
On Tue, Oct 18, 2016 at 11:33 AM, Ethan Dicks wrote:
> I would consider one for my VAX/11-750 since Unibus disk emulation
> solutions aren't plentiful (but I think I'd have to get a DR750
> (L0014) first).
Correction: RH750 (L0007). The DR750 is a CMI-bus "interprocessor interface".
-ethan
> From: Rich Alderson
> There have been 2 generations of Massbus Disk Emulator (MDE) at LCM.
Thanks for the bits... very interesting.
> Data was transferred via FTP over a 100baseT crossover cable connected
> to a Slackware server; the Rabbit was able to keep up with 4 drives at
From: Noel Chiappa
Sent: Monday, October 17, 2016 7:21 PM
>> From: Ian S. King
>>> Does anyone know anything about the status of the plans to open-source
>>> it?
>> I've made some inquries, stay tuned
> OK, thanks!
>>> Can you briefly describe what it was?
> I'm still curious about what
On 10/18/16 6:39 AM, Noel Chiappa wrote:
> From: Paul Birkel
> Maybe there are three ribbon cables back there
Sure looks like it, and running to a standard MASSBUS connector, to boot.
(Not that I have any use for the latter - absolutely no MASSBUS cables at
all. But one could jus
On Tue, Oct 18, 2016 at 9:39 AM, Noel Chiappa wrote:
> > From: Paul Birkel
>
> > Maybe there are three ribbon cables back there
>
> We _definitely_ need to put these things in 'production'.
I would consider one for my VAX/11-750 since Unibus disk emulation
solutions aren't plentiful (
> From: Paul Birkel
> Maybe there are three ribbon cables back there
Sure looks like it, and running to a standard MASSBUS connector, to boot.
(Not that I have any use for the latter - absolutely no MASSBUS cables at
all. But one could just run flat cables from this, to one's RH11/RH7
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Pontus
Pihlgren
Sent: Tuesday, October 18, 2016 1:58 AM
To: General Discussion: On-Topic and Off-Topic Posts
Cc: j...@mercury.lcs.mit.edu
Subject: Re: MASSBUS disk emulator (Was: Unibus controller for MFM
On Mon, Oct 17, 2016 at 10:20:58PM -0400, Noel Chiappa wrote:
> > From: Ian S. King
>
> >> Does anyone know anything about the status of the plans to open-source
> >> it?
>
> > I've made some inquries, stay tuned
>
> OK, thanks!
>
> >> Can you briefly describe what it wa
> From: Ian S. King
>> Does anyone know anything about the status of the plans to open-source
>> it?
> I've made some inquries, stay tuned
OK, thanks!
>> Can you briefly describe what it was?
I'm still curious about what it was: was it a stand-alone board with a
separa
I've made some inquries, stay tuned
On Mon, Oct 17, 2016 at 1:09 PM, Pontus Pihlgren
wrote:
> On Mon, Oct 17, 2016 at 12:16:10PM -0400, Noel Chiappa wrote:
> > > From: Ian S. King
> >
> > > When I left in 2014, LCM's Massbus disk emulator was working quite
> well
> > > indeed, an
>
> Date: Sun, 16 Oct 2016 12:07:24 -0700
> From: "Ian S. King"
> Subject: Re: Unibus controller for MFM disks
>
> When I left in 2014, LCM's Massbus disk emulator was working quite well
> indeed, and was running in 'production' to keep down the
On Mon, Oct 17, 2016 at 12:16:10PM -0400, Noel Chiappa wrote:
> > From: Ian S. King
>
> > When I left in 2014, LCM's Massbus disk emulator was working quite well
> > indeed, and was running in 'production' ... ISTR the plan was always to
> > open-source the hardware and firmware, t
> From: Ian S. King
> When I left in 2014, LCM's Massbus disk emulator was working quite well
> indeed, and was running in 'production' ... ISTR the plan was always to
> open-source the hardware and firmware, too.
I'm interested in this (as I suspect are lots of other people with
On Sat, Oct 15, 2016 at 4:53 PM, Mike Ross wrote:
> A plug-compatible Massbus disk/tape emulator would be a Good Thing;
> there are things like pdp-10s that rely exclusively on Massbus and
> rare finicky power-hungry beasts like RP06. I kinda heard that LCM
> were working on something like that b
On Sun, Oct 16, 2016 at 3:33 AM, Al Kossow wrote:
> I can only think of one, the AED WINC-08 RL02 system, but that used 8" drives
> Good luck finding one, and the matching interface card. I don't think Qualogy
> Emulex or Dilog ever made MFM for Unibus. MFM controllers were mainly a QBus
> market.
> On Oct 15, 2016, at 7:33 AM, Al Kossow wrote:
>
>
>
> I hope someone gets a Q/Unibus non-mscp small disk emulator PCB built
> some day. I wonder if Guy has had any time to work on his.
>
No, I haven’t had any time to work on stuff. I still have the prototype
MEM11A only half built.
>
>
I can only think of one, the AED WINC-08 RL02 system, but that used 8" drives
Good luck finding one, and the matching interface card. I don't think Qualogy
Emulex or Dilog ever made MFM for Unibus. MFM controllers were mainly a QBus
market. I suppose some day I should make a list of all of the Unib
I don't know that Digital ever had a Unibus disk controller for ST412
interface disks, but were there any third party controllers? I'm in
need of disk controllers for PDP-11/40 and think that might be an
option given the availability of reliable MFM disk emulators.
-chuck
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