On Tue, Nov 29, 2016 at 12:54 PM, Toby Thain wrote:
> On 2016-11-29 12:22 PM, Noel Chiappa wrote:
>>
>> > From: Peter Coghlan
>>
>> > Can anyone suggest an existing, simple QBUS device that I could
>> study
>> > the documentation of to figure out what a basic QBUS device needs to
>>
On Sun, Nov 20, 2016 at 7:29 PM, Jon Elson wrote:
> On 11/20/2016 05:30 PM, Charles Dickman wrote:
>>
>> On Fri, Nov 18, 2016 at 6:15 PM, Jon Elson wrote:
>>
>>> OH, yeah! Besides the limited instruction set, short registers only half
>>> populated, etc
On Fri, Nov 18, 2016 at 6:15 PM, Jon Elson wrote:
> OH, yeah! Besides the limited instruction set, short registers only half
> populated, etc., did you know that the 360/20 did not have an adder?
This made me curious about how primitive it was, but the FE docs on
bitsavers show a 16bit ALU that
And where can I get new fan-fold paper tape to put in the trays?
On Thu, Nov 10, 2016 at 2:55 PM, Al Kossow wrote:
> There has to be a better solution than either the vaccum or all-plex cases
> for paper tape. Neither one is very good for
> anything other than what the slots were set up for (li
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
On Wed, Oct 12, 2016 at 8:18 AM, jim stephens wrote:
> I found an Allen Bradley box which uses this, not sure if it needs a hub,
> but points to the use of the hardware.
>
> Allen-Bradley-Data-Highway-Communication-Interface-1770-KF2-Ser-B-Rev-D-/
>
> http://www.ebay.com/itm/391591793086
>
>
Dat
Hi Mark,
On Sun, Aug 28, 2016 at 6:19 PM, Mark G Thomas wrote:
>
> The difficulty I am having is I would like to configure the system with
> both MSCP controller cards installed, so I can boot from either SCSI or
> floppy, preferably with the SCSI still starting at DU0 so my BSD2.11 CFs
> remain
Sorry if my request was unclear. I was asking for the disk data image
for an MFM disk hardware emulator.
On Thu, Aug 25, 2016 at 5:30 AM, Mattis Lind wrote:
> 2016-08-24 22:48 GMT+02:00 Charles Dickman :
>
>> I am looking for an RQDX3 compatible disk image for Dave Gesswein&#
I am looking for an RQDX3 compatible disk image for Dave Gesswein's
MFM disk emulator. I don't have a functional disk to image and the
ZRQCH0 won't cooperate.
Well maybe not, but the first in the 23-001A1 sequence of part numbers
was used in the PDP-8/e EAE. I was troubleshooting a problem with an
EAE in which the step counter wouldn't load. There are 2 fusible PROMs
in the circuit and I noticed they are 23-001A1 and 23-002A1.
Maybe there is a 23-000A1.
I need to make some paper tapes of the diagnostics for my PDP-8/e. I
built an RS232/current loop interface and have it working I think
Did anyone else notice that the standard cable to connect the M8655
to a tty uses shielded twisted pair cable, but doesn't have the signal
pairs in the twisted pa
Has anyone ever worked up a PC parallel port to Facit 4070 paper tape
punch interface?
I found one on a Swedish website. The punch parallel input looks like
it is TTL compatible, but I can't find anything in the documentation
that describes the input voltage specifications.
Chuck
I have been cleaning a PDP-8/e front panel and some of the switches
are not as free as others. The switches are simple slider basic
switches. I have taken similar switches apart and noticed that there
is a brown/red grease on the contacts.
Any suggestions on the proper grease for a low voltage con
On Tue, Apr 12, 2016 at 9:07 PM, Chuck Guzis wrote:
> I use a plain medical glass syringe with a fine blunt tip needle for
> that. I've also found that orthodontic wire cutters work very well as
> flush cutters (and almost as inexpensive as the regular electronics kind).
A couple of weeks ago, l
I have a DATAIO 201 prom programmer that fails the self test with an
error 75. The error translates to a pin fault.
Any help with schematics or suggested debugging experience appreciated.
-chuck
Here is my attempt to convert the DEC Standard 092 color specifications to RGB
http://www.chdickman.com/pdp8/DECcolors/
No Wild Rose on the list, but there is a Brite Rose.
On Sun, Nov 15, 2015 at 4:57 PM, rod wrote:
>
> Thanks Al
> Well they say you never stop leaning and I did n
On Mon, Oct 19, 2015 at 8:04 PM, Fred Cisin wrote:
>>> Does it correlate with the decline of actual FARMING?
>
>
> On Mon, 19 Oct 2015, Charles Dickman wrote:
>>
>> FARMING hasn't declined, only the number of farmers.
>> (Not a farmer, but surrounde
On Sun, Oct 18, 2015 at 6:26 PM, Fred Cisin wrote:
> Does it correlate with the decline of actual FARMING?
FARMING hasn't declined, only the number of farmers.
(Not a farmer, but surrounded by them.)
On Wed, Jul 29, 2015 at 3:34 AM, Eric Smith wrote:
> Some people seem to think that "reforming" an aluminum electrolytic
> capacitor is some kind of cheat, akin to zapping NiCd cells or
> rejuvenating CRTs. Actually reforming is the same electrochemical
>
Reforming is standard practice with
On Tue, Jul 28, 2015 at 11:29 AM, Pete Turnbull
wrote:
>
> No, they're ABS - at least mine are, I just tested a few. I don't know what
> grade, though, and perhaps something more flexible and forgiving - a
> different grade of ABS, semi-rigid PVC, or nylon would be better.
>
> My suggestion, howe
Thanks!
On Fri, Jul 24, 2015 at 6:40 PM, Matt Burke wrote:
> On 23/07/2015 03:45, Charles Dickman wrote:
>> Is it an image available?
>>
>
> MV DIAG CUST TK50 (3 versions):
>
> http://www.9track.net/vax/mvdiag.zip
>
>
> MVII DIAG CUST (RX50 & TK50):
&
Anyone have a datasheet for the NCR83C11? I believe it is a SCSI transceiver.
Is it an image available?
The Edited Option / Module List 21-APR-83 Page 620, 621 says:
RP11 CONTROL FOR 8 RP02 OR RP03
RP11-CA CONT,CAB FOR 8 RP03-AS (20M 16BIT WORDS) 120V
RP11-CB CONT,CAB FOR 8 PR03-BS (20M 16BIT WORDS) 240V
RP11-E RPR02 CONTROL
RP11-EARPR02 & RP03 CONTROL & H950 CAB,120V
RP11-EB
101 - 124 of 124 matches
Mail list logo
