On 8/22/2017 4:30 PM, Adrian Graham via cctalk wrote:
Hi folks,
Failing Atari PSU aside I remembered a question I had ages ago but never posted
about the power circuit of another 80s home micro, the Enterprise 64. This
machine is powered by a 2A 9V unregulated PSU and internally there’s a pair
On 8/15/2017 2:10 AM, Jerry Weiss via cctalk wrote:
On Aug 14, 2017, at 11:49 PM, Glen Slick via cctalk
wrote:
On Sun, Aug 13, 2017 at 9:00 AM, Ulrich Tagge via cctalk
wrote:
Hi all,
maybe someone can help.
I would like to install TCP/IP on my RT-11 system.
After a short search I have found
On 8/13/2017 4:47 PM, Don North via cctalk wrote:
On 8/13/2017 11:34 AM, Jerry Weiss via cctalk wrote:
On Aug 13, 2017, at 12:59 PM, Ulrich Tagge wrote:
Hi Jerry,
I have tried with PDP11GUI, but the first message says "The image contains
only 505856 bytes, but disk has 512512 bytes&quo
On 8/14/2017 12:40 AM, Ulrich Tagge via cctalk wrote:
Hi all,
I have tried to find a specification about the DSK Image format, but have only
found the the following: http://www.cpctech.org.uk/docs/dsk.html , which looks
like the focus is more on CPC related Disks.
Is there any detailed descr
On 8/13/2017 11:34 AM, Jerry Weiss via cctalk wrote:
On Aug 13, 2017, at 12:59 PM, Ulrich Tagge wrote:
Hi Jerry,
I have tried with PDP11GUI, but the first message says "The image contains only
505856 bytes, but disk has 512512 bytes".
I have written some disks, and have ignored this message,
On 7/31/2017 2:52 PM, Ethan Dicks via cctalk wrote:
On Mon, Jul 31, 2017 at 1:52 PM, Fritz Mueller via cctalk
wrote:
On Jul 31, 2017, at 8:19 AM, Jay Jaeger wrote:
I have Ethernet shield for my Arduino Uno, and I use that and a simple
(in my case, perl, program to talk to the final destinatio
On 7/31/2017 10:52 AM, Fritz Mueller via cctalk wrote:
On Jul 31, 2017, at 8:19 AM, Jay Jaeger wrote:
I have Ethernet shield for my Arduino Uno, and I use that and a simple
(in my case, perl, program to talk to the final destination device. I
have two cables, one for each direction, from the
On 7/30/2017 7:47 PM, Fritz Mueller via cctalk wrote:
So, I have lately been using PDP11GUI to retrieve images of RK05 disk packs and
to write images to these packs on a PDP-11. This is awesome, but its a bit
frustrating that it takes a couple hours to read or write an image this way.
I do, h
On 4/21/2017 6:55 PM, allison wrote:
On 04/21/2017 09:34 PM, Don North via cctalk wrote:
On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote:
I've seen suggestion that TU-58s are emulated in simh on
PDP-11s. However, I'm not seeing it in a show dev and my
google-fu is failing
On 4/21/2017 6:34 PM, Don North via cctalk wrote:
On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote:
I've seen suggestion that TU-58s are emulated in simh on
PDP-11s. However, I'm not seeing it in a show dev and my
google-fu is failing me to find any info on how to use it. An
On 4/21/2017 4:25 PM, Brian L. Stuart via cctalk wrote:
I've seen suggestion that TU-58s are emulated in simh on
PDP-11s. However, I'm not seeing it in a show dev and my
google-fu is failing me to find any info on how to use it. Any
pointers on how to boot from a TU-58 image?
TIA,
BLS
Using
On 4/13/2017 7:42 PM, Chuck Guzis via cctalk wrote:
On 04/13/2017 05:47 PM, Jerry Weiss wrote:
Then my dad got transferred to Chicago and that high school had
“access” to IITRAN. By access, that meant punching cards, and
waiting for the teacher to load in batch and waiting for the results.
L
On 3/22/2017 5:03 PM, Don North wrote:
On 3/22/2017 4:25 PM, Bill Gunshannon wrote:
Look here: http://www.vcfed.org/forum/blog.php?12663-AK6DN for info on my
Arduino based RX02 emulator using a microSD card.
Works on RX11/RXV11/RX8E as RX01, RX211/RXV21/RX28 as RX02. Passes DEC
hardware
On 3/22/2017 4:25 PM, Bill Gunshannon wrote:
Look here: http://www.vcfed.org/forum/blog.php?12663-AK6DN for info on my
Arduino based RX02 emulator using a microSD card.
Works on RX11/RXV11/RX8E as RX01, RX211/RXV21/RX28 as RX02. Passes DEC hardware
diagnostics.
Reinhard has done an FPGA ba
On 3/22/2017 10:47 AM, Bill Gunshannon via cctalk wrote:
From: cctalk [cctalk-boun...@classiccmp.org] on behalf of W2HX via cctalk
[cctalk@classiccmp.org]
Sent: Tuesday, March 21, 2017 11:49 PM
To: General Discussion: On-Topic and Off-Topic Posts (cctalk@
I would also do a cleaning of your empty backplane with a good vacuum cleaner
nozzle. It is not uncommon for bits of conductive detritus to fall into the
backplane over time. Given that the pins are adjacent on the connector it might
be a possible cause.
Vacuuming out any stuff that has accumu
On 1/15/2017 10:24 AM, Tony Duell wrote:
On Sun, Jan 15, 2017 at 5:47 PM, Devin wrote:
The cable that came with my 11/34 is for current loop, i need a cable that
is wired for serial. If no one has the cable, i could make one myself, i
just need the 40 pin connector that goes on the cable. I hav
On 1/8/2017 9:10 PM, Brent Hilpert wrote:
OK, what was the standard (if there was one) number-base syntax for PDP-11
assembler?
Despite all the PDP-11 assembly info on web sites, this seems to be a buried
bit of info.
One assembler doc uses a prefix of "&o", another specifies octal as default
And what about this one?
https://github.com/Rhialto/macro11 (forked from shattered/macro11 it
appears...)
So which one of the three versions (at least, maybe more) is the 'preferred' ?
On 11/9/2016 7:52 AM, Jörg Hoppe wrote:
Hi,
I was notified that my fork of R. Krebiehls code was already
On 10/30/2016 5:47 AM, Noel Chiappa wrote:
> From: Don North
> .. the hardware bootstrap reads track 1 sectors 1, 3, 5, 7
Ah, thanks for that. Starting to look at the code, I had missed the
interleave.
So does DEC do anything with track 0, or is it always just empty?
On 10/29/2016 2:32 PM, Ron Natalie wrote:
I think just like everything else the boot rom just pulls in the first
sector of the disk. I had RX02s on many of the BRL Gateways (my
implementation that replaced your MIT Gateway while you were in exile).
We put a V6 file system and I must have had a
On 10/24/2016 1:18 PM, David Bridgham wrote:
On 10/24/2016 01:37 PM, allison wrote:
The voltages are based on TTL levels. What are the unique voltages?
The QBUS spec from the 1979 Bus Handbook (the Unibus levels are the same):
Input low voltage (maximum): 1.3 V
Input high voltage (minimum):
Something new:
http://embedded-computing.com/news/launch-scsiflash-tape-replacement-obsolete-end-of-life-tape-drives/
but no price listed.
Not targeted at the classic computing hobbyist, so probably going to be
expensive.
On 10/10/2016 3:34 PM, Al Kossow wrote:
"9-track tape emulator" bring
On 9/24/2016 8:32 PM, Al Kossow wrote:
I had it on fiche, which I scanned this afternoon.
It should be up on the bitsavers mirrors by morning PDT under pdp11/xxdp
along with rev E of the XXDP+ users guide.
I'll probably also do the RX02 diags if I can find them for Don, though
he may have them o
On 9/23/2016 6:15 PM, Paul Popelka wrote:
You might try looking at the M9312 proms that Don North has made available here:
http://www.ak6dn.com/PDP-11/M9312/
If you have an M9312 in your system it will have the basic console prom in it.
There are listings of the prom contents on that web page
On 9/6/2016 11:55 PM, Don North wrote:
On 9/6/2016 9:23 AM, JP Hindin wrote:
Greetings;
My googlefu is failing me and I was wondering if someone might be able to
help me identify one of the boot ROMs present in an M9312 bootstrap/term
board. The board has three ROMs, an RX01 (042130), an
On 9/6/2016 9:23 AM, JP Hindin wrote:
Greetings;
My googlefu is failing me and I was wondering if someone might be able to help
me identify one of the boot ROMs present in an M9312 bootstrap/term board. The
board has three ROMs, an RX01 (042130), an RX02 (042131) and then a mystery
code - 04
On 8/24/2016 2:21 AM, Pontus Pihlgren wrote:
On Tue, Aug 23, 2016 at 12:31:42PM -0700, Scott Baker wrote:
Hi,
1) DEC documentation which more fully describes all the instruction set (in
more detail than the PDP-8 handbook)
Not DEC documentation but a good resource:
http://homepage.cs.uiowa
On 8/23/2016 12:31 PM, Scott Baker wrote:
Hi,
I have written a PDP-8 VHDL model and I have it running in an FPGA
https://github.com/scottlbaker/PDP8-SOC
At this time it has passed a basic DEC diagnostic instruction test but
I found some interesting things when getting that instruction test to p
On 8/13/2016 6:20 AM, Christian Gauger-Cosgrove wrote:
On 13 August 2016 at 08:07, Noel Chiappa wrote:
I can't recall any other models with front panels? (Well, the /74, but IIRC
there are none of those extant outside museums - although people might want
some for simulators.)
The whole list o
On 8/2/2016 9:18 PM, Cameron Kaiser wrote:
Does anyone have DEC's PDP-8 _Introduction_to_Programming_, Editions 3
and/or 4 and/or the PDP-8 _Programming_Languages_ handbooks?
I have a 4th edition PDP-8 Introduction to Programming. I'm not willing to
part with it and I don't currently have a scan
On 7/26/2016 7:17 PM, Jerome H. Fine wrote:
On Sunday, July 24th, 2016 at 14::29:59 -0700, Don North wrote:
>On 7/24/2016 8:06 AM, william degnan wrote:
>On Jul 24, 2016 8:58 AM, "Jerome H. Fine" wrote:
>On Wednesday, July 20th, 2016 at 18:02:44 - 0400, william degna
On 7/24/2016 2:37 PM, Paul Koning wrote:
On Jul 24, 2016, at 11:06 AM, william degnan wrote:
...
Attempts to boot from RT11SJ.SYS under V04.00 of RT-11 with 24K
bytes of memory were successful. Attempts to boot with 16K bytes of
memory were also successful. An RK05 was used as the disk drive
On 7/24/2016 8:06 AM, william degnan wrote:
On Jul 24, 2016 8:58 AM, "Jerome H. Fine" wrote:
On Wednesday, July 20th, 2016 at 18:02:44 - 0400, william degnan wrote:
Is there a minimum memory requirement for RT-11 v5? I was discussing
with
Ray Fantini about it today, unsure...anyone know if 1
On 6/30/2016 10:29 AM, william degnan wrote:
I seem to remember there is an entry point that one can use to reinitialize
BASIC already loaded into core memory, with the intention of re-answering
the questions about MEMORY SIZE, Use SIN?, etc. Is this correct? I looked
in the docs I have b ut I
smart-phone like
for brain-dead lusers).
> From: Don North
> Mostly PDP11GUI does not care, either 7b or 8b.
I'm kind of surprised to hear that; I assumed that PDP11GUI can download
binaries, and for that, 8-bit is kind of necessary?
PDP11GUI reads papertape files as 8b
On 6/26/2016 12:26 PM, Fritz Mueller wrote:
Hi folks,
I've started to look into hooking up pdp11gui to my 11/45 w/ M9301. Does
anybody here know how the console DL11 should be configured for this wrt. data
bits, parity, stop-bits? I haven't seen this mentioned in the documentation
or tutoria
On 6/24/2016 7:41 PM, Fritz Mueller wrote:
On 06/24/2016 06:28 PM, Don North wrote:
Almost 100% certainty the part already there is a small bipolar TTL PROM.
What would you think it otherwise might be?
For a lot of these logic replacement applications DEC used the open collector
version
On 6/24/2016 4:36 PM, Fritz Mueller wrote:
Hi All,
In bringing up and debugging my PDP 11/45, I found that one of my GRA (M8101)
spares has a failed ALU subsidiary ROM. It's a pretty standard little 32x8
ROM in a 16-pin DIP, and the truth table is in the 11/45 print set.
I wonder what the r
On 6/10/2016 4:56 AM, Michael Thompson wrote:
From: Don North
Subject: Re: UNIBUS M9312 ROMS
Actually the page listed below is a big out of date with respect to some
M9312
images (it is not an up to date mirror).
The up to date page is at: http://ak6dn.dyndns.org/PDP-11/M9312/
--
Don North
from address zero).
paul
In an M9312 boot PROM there are 49. words of bootstrap space that are available
for code and data. Getting an MSCP boot to fit in that space required playing
some tricks like treating some specially crafted instructions as data values
(and vice versa).
-
23-760A9 TT/PR boot PROM does this copy by building a
bootstrap
sequence in RAM, and then jumping to it. Once it is built it is not self
modifying, however.
Ref: http://ak6dn.dyndns.org/PDP-11/M9312/23-760A9/23-760A9.lst
--
Don North
AK6DN
. An 82S129 (or equiv) 256x4 tristate
device works just as well as a boot PROM as the upper address pin becomes an
active low chip select, and this pin is pulled low on the M9312 board.
--
Don North
AK6DN
Actually the page listed below is a big out of date with respect to some M9312
images (it i
. An 82S129 (or equiv) 256x4 tristate
device works just as well as a boot PROM as the upper address pin becomes an
active low chip select, and this pin is pulled low on the M9312 board.
--
Don North
AK6DN
ere:
http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD#Purchase to find links
to vendors
Links to firmware updates and tools here:
http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD#News
I have no vested interest in SCSI2SD, other than being a very satisfied user.
Don
--
Don North
AK6DN
The M9312 can be setup to also act as a UNIBUS terminator card, and can reside
in the
A-B position of the last UNIBUS backplane slot (ie, the 'UNIBUS out' slot).
Some of the jumpers on the card need to be configured to allow this, the M9312
technical manual gives the exact jumper configuration n
illDeg:
Web: vintagecomputer.net
Twitter: @billdeg <https://twitter.com/billdeg>
Youtube: @billdeg <https://www.youtube.com/user/billdeg>
Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>
--
Don North
AK6DN
On 5/14/2016 2:41 PM, Noel Chiappa wrote:
> From Ed Groenenberg
> - insert both CPU cards, KY11-LB card & bootstrap card, 5 full grant
> cards, DL11-W and bus terminator card.
> ...
> - cntrl + boot shows register dump at printer.
> ...
> All looks ok
I'm sur
On 5/2/2016 7:04 AM, Mattis Lind wrote:
The following chips have been used by DEC to interface to the QBUS, and
I have seen many of the above chips (e.g. 8641's) used there too, so I
think chips seen on one bus could be used on the other:
Drivers:
7439 - Various - Quad NAND
Transceivers:
2908
Ok, filed as: https://github.com/simh/simh/issues/285
On 3/12/2016 11:14 PM, Don North wrote:
Fixed!
sim> set cpu 11/34 256K fpp
sim> set tdc enable
sim> attach tdc0 tu58.dsk
sim> b tdc0
BOOTING UP XXDP-XM EXTENDED MONITOR
XXDP-XM EXTENDED MONITOR - XXDP V2.5
REVISION: F0
BOO
te */
sim_data_trace(ctlr->dptr, &ctlr->uptr[ctlr->unitno], ctlr->obuf,
"Boot Block Data", ctlr->olen, "", TDDEB_DAT);
sim_activate (ctlr->uptr+ctlr->unitno, td_ctime);/* sched command */
}
break;
case TD_OPC
7776500(RX_CSR), access=0-Read)
...
DBG(930943)> TDC IRD: RX_CSR: DONE1 IE0
DBG(930945)> TDC RRD: td_rd(PA=17776502(RX_BUF), access=0-Read)
DBG(930945)> TDC IRD: RX_BUF: ERR0 OVR0 RBRK0 DAT=0x20
<---DATA=20
DBG(930947)> TDC RRD: td_rd(PA=17776500(RX_CSR), acces
ds
OS clock resolution: 1ms
Time taken by msleep(1): 1ms
OS: CYGWIN_NT-6.1-WOW lenovoS30w7 2.4.1(0.293/5/3) 2016-01-24
11:24 i686 Cygwin
git commit id: b304d7f4
PDP-11 simulator configuration
On 3/12/2016 3:58 PM, Don North wrote:
Whoops sl
Whoops slight correction .. . the TU58 protocol supports a 16b block number, so
it is 65536 blocks of 512B, or 32MB maximum.
On 3/12/2016 3:55 PM, Don North wrote:
Well looks like I have been living in the past ...
I have been using v3.9 SIMH from the SIMH website (the 'legacy' ve
Well looks like I have been living in the past ...
I have been using v3.9 SIMH from the SIMH website (the 'legacy' version) and
have now gone an upgraded to the github v4.0 version. This one it appears has
supported the serial virtual TU58 device since mid 2015 (at least by comment dates).
I
On 3/10/2016 7:02 PM, j...@cimmeri.com wrote:
On 3/10/2016 9:36 PM, Richard Cini wrote:
Separately… John — the SLUs are at what I think are the standard addresses
and vectors (per the Heathkit and DLV11-J manuals) and the ODT and TU58EM
work. I don’t know what RT-11 is looking for but the conso
On 3/10/2016 5:24 PM, Richard Cini wrote:
Gary, et. al.--
Ok, I spent some time trying this again, and here’s what I did. The system is
very basic — LSI-11 CPU, 32kw of RAM and two SLU cards. Using PDP11GUI and
TU58em emulator. XXDPD2D tape image loads and runs properly with this
configuratio
On 3/6/2016 8:56 AM, Brian Walenz wrote:
How the heck do you copy an RX02 disk for use in simh?
I've been trying to transfer RX02 images between simh and a real PDP11
(that has only two RX02's, console, and ethernet). So far, I've only
attempted sending an RX02 image from the PDP to simh, but s
On 3/2/2016 11:16 AM, Anders Nelson wrote:
I found switch levers and a mounting frame design (
http://www.thingiverse.com/thing:360853) that I would like to have casted
with molded-in color, close to the originals as reasonable.
Has anyone already done this that I can simply buy from? If any inj
On 2/24/2016 1:11 PM, Mike Ross wrote:
Why are you using MRSP mode (-m switch)? Do you know that is absolutely
required?
For VAX-11/730 console yes it is absolutely required as far as I know;
everything I've read about people using emulation there says that it
is.
Mike
Yes it appears that is
ht because traffic happens - and if I disconnect, or
switch Rx/Tx, it just sits there but this is as far as it gets:
MikeUpstairs:~ Imac$ ./tu58 -s 38400 -p /dev/tty.usbserial -d -v -m -x
-r vax73058
info: unit 0 rfile 'vax73058'
info: tu58 tape emulator v1.4j (NF6X fork)
info: (C)
On 1/16/2016 2:04 PM, Steven Hirsch wrote:
Title says it. Perhaps I'm being stupid about search terms, but I'm not
finding much of anything on eBay. One seller has TSOP tubes, but I need
plain, old 300mm DIP tubes. End plugs and pins for them as well.
Plenty of companies offering them on th
On 12/23/2015 10:50 PM, Don North wrote:
On 12/23/2015 7:14 PM, Christian Gauger-Cosgrove wrote:
On 23 December 2015 at 13:44, CLASystems wrote:
Ironically, the shortest and fastest seems to be avoidance of the MQ
altogether [thus making it work on ANY model].
TAD ARGONE
AND
On 12/23/2015 7:14 PM, Christian Gauger-Cosgrove wrote:
On 23 December 2015 at 13:44, CLASystems wrote:
Ironically, the shortest and fastest seems to be avoidance of the MQ
altogether [thus making it work on ANY model].
TAD ARGONE
AND ARGTWO
CLL RAL
CIA
TAD ARGONE
Or it is a mechanical fault due to a package/die bond wire becoming an open
circuit.
This could happen to where the wire joins to either the package or the die pad,
or
a wire that was fused due to excess current. Hard to tell unless you decap the
package.
On 12/22/2015 1:32 PM, Alexandre Souz
On 12/20/2015 5:02 AM, GerardCJAT wrote:
Speaking of KiCad
Yesterday, I tried for the first time KiCad, and my first board design with it.
The very first part I was looking for I was not able to locate it.
Is it because I am a newbe or because this part does not exist yet, beeing "too
On 10/22/2015 10:09 PM, ben wrote:
On 10/22/2015 10:54 PM, Don North wrote:
For PDP2011 direct compatibility then the path of least resistance is
probably
the DE0-NANO with CycloneIV for $79. I have several; nice little boards
for experimentation.
You can get it from Adafruit ($99) or Digikey
On 10/22/2015 9:06 PM, ben wrote:
On 10/22/2015 8:45 PM, Mark Matlock wrote:
Oscar, I am very excited to hear about your PiDP-11 project. I also
would urge you to go to 1:1 scale for the PDP-11/70 panel and also
utilize the classic Purple and Pink color scheme.
One other comment I would make
On 10/22/2015 9:27 PM, ben wrote:
On 10/22/2015 9:44 PM, Don North wrote:
I have one of the DE1 CycloneII device boards and at this point that
family (CycloneII) is a bit old.
If you can get it really cheap (<<$50) go for it, but the last Altera
toolset that supports CycloneII is v1
On 10/22/2015 6:11 PM, jwsmobile wrote:
I'm not sure if the author of this nice bit of work is on here, but I'm
looking at a board for this, the Altera DE-1. Unfortunately there are a
plethora of Altera DE-1 boards and much puzzlement by me as to whether this is
the right one. The page with
On 9/18/2015 10:15 PM, tony duell wrote:
Simple answer. The control store functionality had to fit in the available space
on one hex
sized card, and 16K density DRAM was the only option. Allocating additional
space to use
4K or 1K SRAM would have pushed the CPU design to an additional board, whic
On 9/18/2015 9:51 PM, tony duell wrote:
The VAX-11/730 would have to have the microcode on TU58, as that is the
console media. Quite possible that it actually do load the microcode
from there at power up. I've heard that those machine were slow in so
many ways... :-)
The 11/730 has no microcode
Lucky it is not just scrap metal then, it is a probably restorable 026 keypunch,
of which very few still exist.
By your criteria any classic computer is worth well less than $99, as the metal
content is much smaller than an 026.
And then any car from the 50s or 60s is only worth a few hundred
On 9/18/2015 7:08 AM, Vincent Slyngstad wrote:
From: Charles: Thursday, September 17, 2015 6:46 PM
Anyway, I'd like to do the same thing in SIMH (get the text file into Focal
and then save it as a Focal program). Is there any way to do this with SIMH?
Can I assign the text file to a paper tape
On 9/10/2015 6:32 PM, Jon Elson wrote:
If you want to do some more research, just Google members.iinet and you will
see a lot of hits of the form:
http://members.iinet.net.au/~some_name
and see if you can access ANY of them. From both my home and work IP, I can
not get ANY of these pages to r
On 8/18/2015 7:36 PM, Ben Sinclair wrote:
I'm again trying to debug my PDP-11/23, and I believe I'm having
trouble with my M8067-LB/MSV-11 memory.
According to the manual, there is a diagnostic program called CZKMA
(for my 18-bit system), but I can't seem to find it.
I have all of the xxdp imag
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