On Mon, Apr 22, 2024 at 2:30 PM Paul Koning via cctalk
wrote:
> Anyway, I would think such a small microprocessor could emulate a PDP-11 just
> fine, and probably fast enough. The issue isn't so much the instruction set
> emulation but rather the electrical interface. That's what would be
On Wed, Apr 10, 2024 at 8:07 PM W2HX via cctalk wrote:
> 1. I have read that the card and the drives were compatible with the dec rx02
> drives. Why would the CRDS even bother to redesign a card where DEC had
> perfectly good working ones? Anyone know if there is any value in keeping the
>
On Mon, Apr 15, 2024 at 12:53 AM Christopher Zach via cctalk
wrote:
> Was reading the Wikipedia article on Drum memories:
>
> https://en.wikipedia.org/wiki/Drum_memory#External_links
>
> And came across this tidbit.
>
> As late as 1980, PDP-11/45 machines using magnetic core main memory
> and
On Fri, Mar 15, 2024 at 6:49 PM Charles Dickman via cctalk
wrote:
> Voyager 1 is in the news recently because of communications problems and
> possible solutions. Is there an online source for documentation on the
> Voyager systems, especially the computers and navigation systems?
>
> I have
On Fri, Dec 22, 2023 at 10:20 PM Chuck Guzis via cctalk
wrote:
> Sync (Bisync, SDLC/HDLC) was fairly popular back in the day for linking
> with mainframes. (Think, for example, IBM HASP). On PCs and the like,
> the Intel 8251 was used a lot, but even the Signetics 2651 has the sync
> mode,
On Mon, Nov 27, 2023 at 5:32 PM Rick Bensene via cctalk
wrote:
> Steve Lewis wrote:
> > then like the 4004, we're struggling to find evidence of actual products
> > that
> > made use of them. Wasn't the 4004 used in some cash registers, street
> > lights, or
> > some weighing machines? (I
On Fri, Oct 20, 2023 at 1:46 PM Henry Bent wrote:
> I have a SIMH installation of Ultrix-11 3.1 on RL02 drives. Two RL02s is
> enough for a base system and four (which would be what the DQ614 provides, if
> it worked) would be more than enough for sources and work, etc.
Yes. 40MB should be
On Wed, Oct 18, 2023 at 10:21 AM Henry Bent via cctalk
wrote:
> Interesting. My Dilog DQ614 (ST506 emulating RL02s) specifically does not
> work with Ultrix, but does work with 2.xBSD and v7, so I would not
> necessarily assume that a third-party board was going to work with
> Ultrix-11's
On Fri, Oct 20, 2023 at 12:11 PM Jon Elson via cctalk
wrote:
> On 10/20/23 03:59, Michael Thompson via cctalk wrote:
> > The RICM has an empty 11/20 chassis and the power supply. All it needs is
> > the processor backplanes. Is there any chance you have a set of backplanes
> > available?
> >
> I
On Thu, Aug 17, 2023 at 2:34 PM Bill Degnan via cctalk
wrote:
> On Thu, Aug 17, 2023 at 2:28 PM Ethan Dicks via cctalk <
> I should add that part of the fun is to locate parts for free or cheap from
> dead or unimportant period electronics, cards, etc. In that way slowly
> b
On Sat, Aug 5, 2023 at 6:11 PM Cameron Kaiser via cctalk
wrote:
> I have an IMSAI as well, but for me my favourite computer of that era is the
> KIM-1, and that's such a simple design there are tons of implementations
I only recently got a KIM-1 (at VCF East). It's been on my list for a
while
On Sat, Aug 5, 2023 at 4:08 PM Bill Degnan via cctalk
wrote:
> But...because the apple I is so valuable people have been motivated to
> produce really nice replica motherboards. The replicas give many the
> chance to experience the Apple I at a reasonable price
I have a bare replica PCB. It's
On Thu, Jul 27, 2023 at 11:28 AM Mattis Lind via cctalk
wrote:
> Perhaps it would be a good idea to upload de-interleaved images along with
> the .IMD, .DSK and a quick document that explains the situation. Otherwise
> we will have this coming up every now and then and people will scratch
> their
On Mon, Jul 17, 2023 at 1:05 PM Paul Koning via cctalk
wrote:
> > On Jul 17, 2023, at 12:51 PM, Ethan Dicks via cctalk
> > wrote:
> >
> > On Mon, Jul 17, 2023 at 12:48 PM Ethan Dicks wrote:
> >> From: http://www.chdickman.com/pdp11/pro380.txt
> >>
>
On Mon, Jul 17, 2023 at 12:48 PM Ethan Dicks wrote:
> On Mon, Jul 17, 2023 at 12:28 PM Henry Bent via cctalk
> > I'm almost thoroughly unfamiliar with IMD - is there some obvious
> > extraction/conversion option that I am missing here?
As mentioned previously, yes. There's an additional step
On Mon, Jul 17, 2023 at 12:48 PM Ethan Dicks wrote:
> From: http://www.chdickman.com/pdp11/pro380.txt
>
> "The RX50 floppy starts at track 1. Track 0 is logically placed after
> track 79. The sectors are interleaved 1, 3, 5, 7, 9, 0, 2, 4, 6, 8,
> 10. The track shift and interleave must be taken
On Mon, Jul 17, 2023 at 12:28 PM Henry Bent via cctalk
wrote:
> I just noticed that images of a full RX50 floppy set for Ultrix-32m 1.2 was
> posted on Bitsavers (
> http://bitsavers.trailing-edge.com/bits/DEC/vax/ultrix/1.2/ULTRIX-32M_V1.2_RX50_1986.zip
> ). I am having difficulty parsing these
On Thu, Jul 6, 2023 at 6:26 PM Bill Degnan via cctalk
wrote:
> I am going throw out a Jim Butterfield too
I never got to meet him or correspond with him directly, but through
his articles and his work with TORPUG, he absolutely had a huge
indirect influence on my early years.
I did learn plenty
On Sun, Jun 18, 2023 at 7:56 PM Cameron Kaiser via cctalk
wrote:
> > Just letting everyone know that Bob Applegate passed away a few days ago.
> > He had been battling cancer for some time. He was involved with vintage
> > computing for some time. Here is his website: http://www.corshamtech.com/
On Fri, Jun 16, 2023 at 10:26 PM Tomasz Rola via cctalk
wrote:
> I guess we are all prisoners of our own mental frame. I recall that
> Ken Olsen (DEC founder), once quipped "There is no reason for any
> individual to have a computer in his home." - that was in 1977,
> according to wikiquote:
>
>
On Wed, Jun 14, 2023 at 12:21 PM Sellam Abraham via cctalk
wrote:
> Based on other videos of Dave's that I've watched he doesn't really know
> what he's talking about so I wouldn't lend much credence to his apocrypha
> either.
Agreed. Some months back, Dave put out one of his videos with a
On Fri, Jun 2, 2023 at 4:38 PM Sellam Abraham via cctalk
wrote:
> On Fri, Jun 2, 2023 at 8:24 AM Ethan Dicks via cctalk
> wrote:
>
> > I did see an actual 1970s station wagon loaded with RL02 cartridges
> > once, pulled up at the dock of Baker Systems, the large Computer
On Thu, Jun 1, 2023 at 4:45 PM Alexander Schreiber via cctalk
wrote:
> On Wed, May 31, 2023 at 05:01:34PM -0700, Fred Cisin via cctalk wrote:
> > What is the bandwidth of a station wagon full of 1TB Mcro-SD cards hurtling
> > down the highway?
>
> $BIGNUM.
I did see an actual 1970s station wagon
On Tue, May 16, 2023 at 4:05 PM Dennis Boone via cctalk
wrote:
> > At the most recent CoCoFEST!, I brought home the old Glenside Club
> > Computer Hard Drive. The mechanism is an ST-251...
<
> The best way to approach this, given the interchange issues with MFM
> disk controllers, is probably
On Sun, Apr 30, 2023 at 8:47 PM W2HX via cctalk wrote:
> Can anyone tell me what I picked up at a NH hamfest this weekend for $20? I
> see it says RL01/RL02. I have two RL02 drives and some platters. None of
> which I have gotten around to trying. Other than a copious amount of pine
> needles,
On Thu, Mar 9, 2023 at 5:05 PM Cameron Kaiser via cctalk
wrote:
> This has been around the block:
>
> You can lose a screw in a micro.
> You can lose a screwdriver in a mini.
> You can get lost in a mainframe.
We had an Amdahl in the middle of a multi-thousand-square-foot
computer room (one of
On Wed, Mar 8, 2023 at 3:59 PM Bill Gunshannon via cctalk
wrote:
> I had some good sized iron in my home in the early 80's.
We (my family - I put up 1/3, my mother covered the other 2/3) got a
PET in 1979. I came home from my first Dayton Hamvention in 1982 with
a PDP-8.
If a high school kid
On Mon, Jan 23, 2023 at 6:09 PM Sellam Abraham via cctalk
wrote:
> I submit that the //gs isn't even really an Apple ][ properly.
> It's more like a quasi-Macintosh with really good (not perfect) built-in
> emulation of an Enhanced //e.
That totally makes sense. I never got into the //gs and
On Sun, Jan 8, 2023 at 11:52 AM Liam Proven via cctalk
wrote:
> > Win95/Win98 would be happy with a PC/AT 286, with appropriate RAM
>
> Nope. 32-bit only. 386DX or later. I tried it and benchmarked it at
> the time of release. And it beat WfWg 3.11 by a significant margin, to
> everyone's
On Sun, Jan 8, 2023 at 1:50 PM Chris Zach via cctalk
wrote:
> That will be complex. I had an RK8 disk controller (the 6 foot cabinet
> that was it) along with a pair of the RK03 disk drives and it was (a)
> insane, (b) heavy beyond belief, and (c) finicky.
I think I've only ever seen pictures.
On Sun, Jan 8, 2023 at 6:40 AM jos via cctalk wrote:
> On 08.01.23 01:51, jake utley via cctalk wrote:
> > Hello everyone I’m a young collector (18) of 60s and 70s minicomputers and
> > micros. I have been restoring a PDP-8L and would love to find ether a
> > Diablo series 30 or Dec RK03
On Tue, Dec 20, 2022 at 5:35 PM Bill Degnan via cctalk
wrote:
> We used to shun anything newer than and including the IBM PC but
> time.marches on. You're safe if you discuss systems produced before 1990.
> After that put an OT in the front of your subject so as not to offend the
> purists.
On Sat, Nov 12, 2022 at 8:23 PM Sellam Abraham via cctalk
wrote:
> I recommend the DEADBEEF dish.
FEED FACE DEAD BEEF
-ethan
On Sat, Nov 12, 2022 at 12:18 PM Chuck Guzis via cctalk
wrote:
> On 11/12/22 02:28, Tony Duell via cctalk wrote:
> > ... This is the sort of
> > thing I'd do with a couple of transistors or an NE555 depending on
> > which turned up in the junk box first.
>
> One thing that a small MCU has over a
On Tue, Nov 1, 2022 at 12:01 PM Paul Koning via cctalk
wrote:
> > On Oct 30, 2022, at 2:49 PM, Wayne S via cctalk
> > wrote:
> >
> > The difference between dz and dh interfaces is that the dh used dma instead
> > of interrupts to get characters to the cpu...
>
> No, it doesn't. I was confused
On Sun, Oct 30, 2022 at 2:49 PM Wayne S via cctalk
wrote:
> The difference between dz and dh interfaces is that the dh used dma instead
> of interrupts to get characters to the cpu. It would be transparent to any
> software.
> I did a write up on them 40 years ago justifying the replacement of
On Wed, Oct 12, 2022 at 11:36 AM Paul Koning wrote:
> > The clip nut is 10-32...
>
> That's the same clip nut used on H-960 racks. I saw some at the local
> hardware store recently. An unusually well stocked hardware store,
> admittedly, but clearly they are still current items.
It's the
On Tue, Oct 11, 2022 at 7:21 PM Vincent Slyngstad via cctalk
wrote:
> Bob Armstrong sent some pictures from Jack, which helped my find the
> photos I knew were online somewhere:
> https://forum.vcfed.org/index.php?threads/adding-a-programmers-console-to-a-pdp-8-a.75942/#post-921828
That's
On Tue, Oct 11, 2022 at 1:17 PM Vincent Slyngstad via cctalk
wrote:
> On 10/11/2022 10:08 AM, Tony Duell wrote:
> > On Tue, Oct 11, 2022 at 6:04 PM Vincent Slyngstad via cctalk
> > wrote:
> >
> >> Those are the ones. The 3D printed parts are essentially triangular
> >> blocks that mount to the
On Sun, Sep 18, 2022 at 2:30 AM jim stephens via cctalk
wrote:
> I'm getting ready to move to KC and my pile of DSD is back there.
Hi, Jim,
Cool.
> I have both PDP8 varieties and PDP11. One complete system from Sellam
> which hopefully contain data, etc. Dual booted for a friend he helped
Greetings, all,
While getting ready for VCF Midwest etc, I have been spending a lot of
hobby time in the past year digging out various DEC minicomputer items
and testing/repairing them. To that end, I've been staring at a DSD480
on top of a PDP-8 rack. It's one of the ones with the DSD 26-pin
I see it (and I observed the same thing - just rejoined after having
subscription problems stretching back to May, and didn't see any
traffic).
-ethan
On Fri, Sep 16, 2022 at 12:09 PM Kevin McQuiggin via cctalk
wrote:
>
> Pardon the test message, I have just re-subscribed to the list but have
On Mon, Apr 11, 2022 at 8:43 AM Chris Zach wrote:
> On 4/10/2022 6:05 PM, Ethan Dicks wrote:
> >> Ton of pdp8/12 IO cables. These are the black circular wire ones, I
> >> think negibus.
> >
> > There's definitely some discussion going on about those. They are
> > desired by 12-bit folks.
>
>
On Sat, Apr 9, 2022 at 3:43 PM Chris Zach via cctalk
wrote:
> I'm thinking about going up to VCF in Wall next weekend.
22-24 Apr, as mentioned...
I should be there too.
> I haven't been
> to it since it was the Trenton Computer Fest (think late 1990's)
Totally unrelated event.
> so I'm
> not
On Fri, Mar 11, 2022 at 8:03 AM Tom Hunter via cctalk
wrote:
> As there is no real cctalk traffic other than test messages I thought I
> post something a bit more interesting. Here is a short video of my fully
> restored DEC H500 Computer Lab with an 8-bit counter implementation
> including
On Tue, Feb 22, 2022 at 9:29 PM Rod Smallwood via cctalk
wrote:
> 2. The PC I want to use is a DEC Celeibris FX ie the PC and its W95
> software is as supplied by DEC.
.
.
.
> 5. putR was supposed to be able to do this. It does not.
Rod,
My memory is that programs like putr need to run on
On Tue, Feb 22, 2022 at 10:43 PM Jay Jaeger via cctalk
wrote:
> Writing a 360KB or RX50 diskette with a 1.2MB drive is a path to a lot
> of frustration. Not only do you have to double step the drive (software
> often takes care of that part), but the tracks written will be narrower
> than a real
On Tue, Feb 22, 2022 at 10:20 AM Antonio Carlini via cctalk
wrote:
> I imagine it was possible to hook up RX50s to a VAX-11/750 but I never
> saw one configured that way. Why not use tape :-)
We had an RUX50 on our 11/750 (I still have it). It's just another
MSCP controller, but since we had a
On Tue, Feb 22, 2022 at 9:02 AM Antonio Carlini via cctalk
wrote:
> I never installed it this way myself, but MicroVMS on the MicroVAX II
> was distributed on RX50 floppies: lost of them.
I have 2-3 install kits for MicroVMS on RX50. I'm working on imaging
them. First attempts were not
On Sat, Feb 19, 2022 at 4:40 PM Fritz Mueller via cctalk
wrote:
> > On Feb 19, 2022, at 12:11 PM, Fritz Mueller wrote:
> A few additional details, in case it is helpful:
>
> IIRC, the 11/34 doesn’t have SACK timeout implemented in the CPU cards (the
> /34A did add this, however.) So without an
On Mon, Feb 7, 2022 at 8:32 PM William Sudbrink via cctalk
wrote:
> You may recall that, a few weeks ago, I requested parts help (shopping
> baskets) for the Retro Chip Tester Pro that I got for Christmas. Well,
> today's mail
> brought the last few parts and I have finished and tested it.
On Wed, Jan 12, 2022 at 12:16 PM Mike Katz via cctalk
wrote:
> I am looking for one or two 8" floppy drives, preferably Shugart
> compatible at a reasonable price.
>
> Does anyone have anything like this laying around, unused, in their
> basement, storage locker, garage, etc.
>
> I am looking to
On Mon, Jan 3, 2022 at 12:29 PM Bill Gunshannon via cctalk
wrote:
> On 1/3/22 11:50 AM, Ethan Dicks via cctalk wrote:
> > I'll agree with that. We used to run 40-50 users on our 8MB 11/750
> > (with both CMI and Unibus disk) but it did do some swapping over 8-10
> > use
On Mon, Jan 3, 2022 at 12:18 AM Warner Losh via cctalk
wrote:
> I had accounts on a MicroVAX 2 and a VAX 11/750. The microvax was faster
> for most compute jobs, but the 750 with 1/4 the memory handled more users
> mostly in text editors with the occasional compile or nroff/troff jobs.
> IIRC,
On Sun, Jan 2, 2022 at 11:31 PM Chris Zach via cctalk
wrote:
> Oh yes, the 730 is probably the neatest little "pocket Vax". Especially
> if you have the R80 drive as well as the RL02. The R80 did not use the
> Unibus, correct?
Correct. The R80 connects to the RB730 controller which has its own
On Sat, Jan 1, 2022 at 6:40 PM Chris Zach via cctalk
wrote:
> Regardless, I found a M857 board with a RS232 cable on it and BC01R-25
> on it. Was that for a pdp11/05 by chance?
I found this reference from the Cables Handbook. Sounds like it was a
generic cable that probably worked with several
On Fri, Dec 17, 2021 at 10:13 AM Paul Koning via cctalk
wrote:
> > Has anyone tried 3D printing these?
>
> Interesting idea. A while ago someone posted a picture of what looks like a
> "go/no-go" gauge for DECtape reels. It is marked with the dimensions of the
> two sides: 2.504-2.505 inches
On Mon, Dec 13, 2021 at 5:06 PM Mike Katz via cctalk
wrote:
> For my kids and their friends I used to set up several (up to like 5)
> bare motherboards first with lantastic 2MB cards and then NE2000 10mB
> compatible cards and play Doom over IPX back in the 90's.
Yes. Thank you. IPX. That
On Mon, Dec 13, 2021 at 3:09 PM Grant Taylor via cctalk
wrote:
> On 12/12/21 10:28 PM, Ethan Dicks via cctalk wrote:
> > I haven't used ARCnet since we used to use it for 4-player Doom
> > (especially since not everyone in the gaming group had Ethernet at
> > home yet an
On Sun, Dec 12, 2021 at 4:27 PM Jonathan Haddox via cctalk
wrote:
> I'll be following your progress with interest, I just installed Coax into
> the walls of my computer playhouse so I can ARCNet with my S-100 system. I
> have an ARCNet packet sniffer that can be loaned out if you would find it
On Sat, Dec 11, 2021 at 4:31 PM Ethan Dicks wrote:
> On Sat, Dec 11, 2021 at 1:21 PM Noel Chiappa via cctalk
> > https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
> >
> > has a couple of PDP-8 boards for sale that at the moment are going _really_
> > cheap.
They went for $80-$100 each,
On Sat, Dec 11, 2021 at 1:21 PM Noel Chiappa via cctalk
wrote:
> This guy:
>
> https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
>
> has a couple of PDP-8 boards for sale that at the moment are going _really_
> cheap.
Tap handles and DEC boards? Odd mix.
I took a risk and bid. I
On Wed, Dec 8, 2021 at 2:43 AM Jos Dreesen via cctalk
wrote:
> >Also, when the tapes arrive, are there recommendations in case their
> > drive belts are gone?
>
> You can 3D-print replacements.
> Use Innoflex filament, 100% fill-in and the following OpenScad formula :
>
> module ring(d1,d2,w)
On Mon, Dec 6, 2021 at 5:28 PM Paul Koning wrote:
> Raspberry Pico PIO engines are seriously cool. I used them to implement
> DDCMP synchronous line protocol in a small USB device wrapped around one of
> those devices. That includes the "integral mode" modulate/clock
> recovery/demodulate
On Mon, Dec 6, 2021 at 10:36 AM Mike Katz via cctalk
wrote:
> One dumb suggestion to make it easier to control 144 lamps is to use
> addressable LEDs. You can control them in banks or all in a single
> serial line. If you use a single line you can control all of them with
> just 1 GPIO.
>
>
On Mon, Dec 6, 2021 at 9:42 AM David Bridgham via cctalk
wrote:
> The inlays are mostly not done with any tools I have. I do the graphics
> with Inkscape. Rod made up the blanks with silk screening. Then I have
> the white printing done at a printshop I found who has a large, flatbed
> printer
On Sun, Dec 5, 2021 at 2:12 PM Noel Chiappa via cctalk
wrote:
> There is discussion of doing a run of indicator panel inlays:
> for the RK11-C (which is wired for an indicator panel, although as far as
> I know, DEC never did the inlay).
>
> If you're interested... you will need a standard DEC
On Mon, Nov 29, 2021 at 3:19 PM Henk Gooijen via cctalk
wrote:
> I think the FP11 boards are not essential for the 11/70
> They only add hardware FP support.
Not essential for many uses, but I'm pretty sure UNIX is unhappy
without them. If you are going to run RSTS/E or RT-11, should be just
On Thu, Nov 18, 2021 at 3:15 AM Christian Corti via cctalk
wrote:
> On Wed, 17 Nov 2021, Ethan Dicks wrote:
> > ... The IBV11 can certainly keep up with the
> > 6502 in the drive that's banging out the IEEE-488 protocol.
>
> Our Tektronix 4051 can talk to and use Commodore IEEE floppy drives for
On Tue, Nov 16, 2021 at 6:09 PM Christian Gauger-Cosgrove
wrote:
> On Tue, 16 Nov 2021 at 16:27, Ethan Dicks via cctalk
> wrote:
> ... I have experience with IEEE-488 from my many hours
> > spent with Commodore PETs.
> >
> Hmm now that I'm reminded that a large proportion
On Tue, Nov 16, 2021 at 11:01 AM Douglas Taylor via cctalk
wrote:
> In my pile of DEC computer stuff I have a DEC qbus IBV11 IEEE-488
> controller board (M7954) with cable (BN11-A) that connects to the GPIB bus.
Fun card. Thanks for starting this thread. I have one too (came with
my MINC-11)
On Thu, Oct 28, 2021 at 10:00 AM Alan Perry wrote:
> Aside from the posts on the side of the connector, what is unique about the
> cable and connector? What’s the deal with those posts? Aside from them, it
> looks like a 6P4C with only three leads connected.
AFAIK, the posts are there so you
On Thu, Oct 28, 2021 at 4:46 PM Ethan Dicks wrote:
>
> Hi, Tom,
>
> Thanks!
That was supposed to be off-list and I even checked recipients... :-(
-ethan
Hi, Tom,
Thanks!
Yes. Sun3 mouse has RJ-11ish connector. It plugs into the keyboard which
has a DA15 for the host. Totally different plugs from Sun4 and later.
Ethan Dicks
2447 N. 4th St.
Columbus OH 43202
On Wed, Oct 27, 2021, 01:09 Tom Uban via cctalk
wrote:
> Located. It was
On Tue, Oct 26, 2021 at 5:20 PM Alan Perry via cctech
wrote:
> >>> https://www.ebay.com/sch/xi_jinping/m.html?item=334195034340=item4dcf9388e4%3Ag%3Ar%7EcAAOSwFVhhd12t=nc&_trksid=p2047675.l2562
> I would be more concerned about paying $50 for an untested mouse.
I half expect that the LEDs need
On Tue, Oct 26, 2021 at 10:45 AM Ethan Dicks wrote:
> On Tue, Oct 26, 2021 at 2:43 AM r.stricklin via cctech
> wrote:
> > https://www.ebay.com/sch/xi_jinping/m.html?item=334195034340=item4dcf9388e4%3Ag%3Ar%7EcAAOSwFVhhd12t=nc&_trksid=p2047675.l2562
> >
> > Hadn't realized before that there were
On Tue, Oct 26, 2021 at 2:43 AM r.stricklin via cctech
wrote:
> https://www.ebay.com/sch/xi_jinping/m.html?item=334195034340=item4dcf9388e4%3Ag%3Ar%7EcAAOSwFVhhd12t=nc&_trksid=p2047675.l2562
>
> Hadn't realized before that there were Sun-2 mice which weren't black (were
> white/beige). I know
On Mon, Oct 4, 2021 at 7:42 PM Chris Zach via cctalk
wrote:
> Oddly enough I do have a copy of Pro/Venix 1.0 that would fit on a
> Pro/350 with a 5mb hard drive. Slow as *dirt*, you could literally watch
> the hard drive seek back and forth with the little arm on the side. But
> it did work.
I
Hi, All,
I'm fiddling with my 11/725 and as part of that, I'm prepping possible
system images to deploy using the 10-year-old 11/730 emulator that's
now part of SIMH. I'm trying to get the original (v3.8) version
working because of the numerous changes to how simh 4.0 works now.
I'm working
On Tue, Sep 28, 2021 at 5:30 PM Fred Cisin via cctalk
wrote:
> "Baby Duck Syndrome": you bond to the first one. Any time you are tempted
> to switch, everything that any other one does differently is "just all
> wrong". If you are eventually compelled to switch, you will bond to a new
> one;
On Thu, Sep 23, 2021 at 6:41 PM Jonathan Stone via cctalk
wrote:
> I've read that there is circuitry in the expansion base (BA40A?) has
> circuitry . Does anyone know what the circuitry does? Is it required for
> SCSI operation? (I hope not, or I'll have to kludge one up to make use of
>
On Tue, Sep 21, 2021 at 4:37 PM Jonathan Chapman via cctalk
wrote:
> > The DEC-badged Data-IO " on eBay is tempting, but expensive, and I don't
> > know where to find software.
>
> If it is just a regular Data I/O underneath, head over to the groups.io page:
>
> https://groups.io/g/DataioEPROM/
On Tue, Sep 21, 2021 at 2:04 PM Josh Dersch via cctalk
wrote:
> (DEC did make a Unibus to Qbus adapter, the DW11-B, but it was unrelated to
> the VS100)
Yes. I have one. It came in a PDP-11/34 so they could install an
IBV11 on a Unibus machine for a Physics Department.
Much older than the
On Mon, Sep 20, 2021 at 5:24 PM Dave Wade G4UGM via cctalk
wrote:
> Do you know what type of ROM/PROM is needed
4x 27512 (32-bit wide image)
I have a MicroVAX 2000 but haven't managed to get that SCSI hack working myself.
It's been many years since I last fiddled with it.
-ethan
On Fri, Aug 20, 2021 at 1:14 PM Bill Gunshannon via cctalk
wrote:
> > http://ftp.fibranet.cat/UnixArchive/Distributions/DEC/Fred-Ultrix3/setup-3.1.txt
> >
> > I've installed older versions of UNIX where you had to explicitly set
> > up disks and partitions (where you _could_ resize partitions).
On Fri, Aug 20, 2021 at 11:50 AM Peter Allan via cctalk
wrote:
> I just installed Ultrix-11 3.1 using the ultrix31.tap file from
> https://pdp-11.org.ru/files.pl?lang=en
> which is the location from the comments in Stephen's Machine Room video on
> YouTube that I think started this thread.
>
> It
On Thu, Aug 12, 2021 at 10:48 AM Al Kossow via cctalk
wrote:
> I suspect interest in emulating them will die out once they get past the
> 68000 models.
I may still have a II, and I definitely still have at least one
(functional) III and a 4Si
I still use my 4M/L all the time - Postscript +
On Mon, Jul 26, 2021 at 6:02 AM Peter Corlett via cctalk
wrote:
> The Amiga could get 880kiB on a DD disk, and 1760kiB on a HD disk if you have
> one of those hen's teeth drives which spin at 150RPM. It does this by doing a
> read-modify-reformat of the entire track of 11 or 22 sectors, which
On Wed, Jul 21, 2021 at 10:52 PM Cameron Kaiser via cctalk
wrote:
> > > "Houston Computer Museum" ... I wouldn't call this a "museum". The
> > > condition of the stuff is fitting for a garbage tip. It is a disgrace.
> >
> > Isn't this the place in Texas that flooded last year?
>
> Houston and
On Tue, Jul 13, 2021 at 10:21 PM Brian Roth via cctalk
wrote:
> Its going to be interesting for sure. I am currently running some better
> power into the shop. The requirements for the 6000 is 3 phase. I just
> finished reassembling the power inlet box and I'm pretty sure it will run
> fine on
On Mon, Jul 5, 2021 at 9:37 PM Zane Healy wrote:
> > On Jul 5, 2021, at 5:05 PM, Ethan Dicks via cctalk
> > wrote:
> >
> > On Mon, Jul 5, 2021 at 2:46 AM David Brownlee via cctalk
> > wrote:
> >> In case anyone was interested in an FPGA VAX implementation
On Mon, Jul 5, 2021 at 2:46 AM David Brownlee via cctalk
wrote:
> In case anyone was interested in an FPGA VAX implementation
> http://mail-index.netbsd.org/port-vax/2021/07/03/msg003899.html
I think this is fantastic, but getting the CPU running is only the
start. I'll be curious what/how
On Tue, Jun 22, 2021 at 6:32 AM Grant Taylor via cctalk
wrote:
> > I would love to see REAL RS232 on a RBPi, probably even the original
> > MMJ from DEC for keyboard & mouse
>
> What is a /real/ RS-232? How does it differ from USB-to-RS-232 and / or
> bit banging GPIO lines?
The OP said he
On Mon, Jun 21, 2021 at 11:14 PM Douglas Taylor via cctalk
wrote:
> Wow, that is very helpful. I had downloaded xterm from
> invisible-island.net and executed a ./configure. I complained that I
> lacked the Athena X widgets, so I paused on it.
I got that. On a RHEL7 box, I did:
$ sudo yum
On Mon, Jun 21, 2021 at 4:12 PM Grant Taylor via cctalk
wrote:
> On 6/21/21 1:07 AM, Ethan Dicks via cctalk wrote:
> > I'm not the OP, but I'm interested in fiddling with ReGIS a little.
> > I just pulled out my VS240 and fired it up. Right now, I have a
> > VR201 on it, bu
On Mon, Jun 21, 2021 at 2:47 AM Grant Taylor via cctalk
wrote:
> On 6/18/21 5:50 PM, Wayne S via cctech wrote:
> > We didn't really need Regis graphics so we never tested that out.
>
> I'm not sure what the OP's use case is, but if they / you are wanting
> ReGIS (or Sixel) graphics, XTerm
On Sun, May 30, 2021 at 11:42 AM Vincent Slyngstad via cctalk
wrote:
> https://so-much-stuff.com/pdp8/computerlab/computerlab.php
> The photos get a little bigger if you click them. Those bits of stamped
> brass or whatever they are made of were probably pennies each.
I've thought about what it
On Sat, May 29, 2021 at 10:58 AM William Donzelli via cctalk
wrote:
> Over on the Discord, I have posted a DEC Computer Lab H-500 for sale.
> Needs cosmetic help, but will be priced accordingly.
I already have one, but it has no wires and a reasonable substitute
has not come to light despite
On Mon, May 17, 2021 at 8:53 PM Paul Koning via cctalk
wrote:
> There are two comms option cards: the DECNA Ethernet, and the 3CA quad UART
> (a very obscure device).
Yeah... I have neither of those, but at least I've seen a picture of a DECNA.
> The other limitation is the software. DEC only
On Wed, May 12, 2021 at 1:11 AM Lars Brinkhoff via cctalk
wrote:
> There are also at least two GT40 implementations of Spacewar. One from
> MIT, by Dick Waters, and another from SAIL, by Bo Eross. They run fine
> on SIMH, but it would be nice to see them on real hardware too.
Is there a web
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