where to find DEC ECO's for KB11-A?

Are DEC ECO's available online anywhere? I have not seem them in the usual places e.g. bitsavers... I am particularly interested in ECO's related to the KB11-A (11/45). thanks, --FritzM.

Re: where to find DEC ECO's for KB11-A?

Thanks a lot, folks! And of course, thanks so much Al for bitsavers -- the DEC archives there, for me at least, have made this whole hobby possible! I have an early (serial 152) 11/45 that I've been restoring. Just now to the point in CPU debug where I can reliably toggle in and run simple

PDP-11/45 restoration running console emulator

Just wanted to share some joy here: after a months-long spare time restoration and debug process, the PDP-11/45 I've been working on booted to the M9301 console emulator last night (pic at http://fritzm.github.io/images/pdp11/m9301-running.jpg). Made me super happy to see that register dump an

(off topic) Re: PDP-11/45 restoration running console emulator

On 06/24/2016 01:08 PM, william degnan wrote: BTW - What kind of guitar is that? (in your profile photo). Looks like a Fender It was an 80's Japanese Fender p-bass, sadly no longer with me -- was stolen from my car some time back :-( --FritzM.

Re: PDP-11/45 restoration running console emulator

On 06/24/2016 01:06 PM, william degnan wrote: ...I would be interested if you posted results of your testing using the M9301 and the PDPGUI... Sure! I've also been blogging the project at http://fritzm.github.io/category/pdp-11, and will continue to post notes there as I go. --Fri

Wanted: VT5x roll-around stand

I have a nice VT52, but it sits on the floor right now... I would dearly love to track down one of the old roll-around pedestals for it (as pictured here: http://cdn4.static.ovimg.com/m/04jldl). Didn't happen to see one in the warehouse by any chance, did you Todd? :-) cheers,

KM11 uPB question

Hey folks, While working on my 11/45, I built up a KM11 replica based on Tom Uban's ExpressPCB layout. I noticed the following behavior when trying to use it in uPB mode on my KB11-A CPU: * If I set up uPB, set KM11 S1 on and S2 off, and resume execution, the breakpoint fails to stop the

Re: Wanted: VT5x roll-around stand

Yes, please, thanks! If we can't track down any real ones, maybe we could bang out some plans something nice/convenient. (I know, I know, its silly, its just a pedestal stand with five casters...) --FritzM. On 06/24/2016 03:59 PM, Jason T wrote: On Fri, Jun 24, 2016 at 5:29 PM, Mark J.

options for replacing failed small ROMs in PDP-11

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 replacement options are for parts like these

Re: Wanted: VT5x roll-around stand

On 06/24/2016 05:05 PM, Paul Anderson wrote: ...I know where there might be one or too, but they are currently burried. I'll call him next week to see if he'll sell them... That'd be great, thanks! --FritzM.

Re: options for replacing failed small ROMs in PDP-11

Thanks for the info, Don -- learning a lot about this stuff as I go... I had wondered if the part might have been a mask ROM rather than a PROM. And wrt. timing, I was certainly mistaken to call the nominal interval between the clock pulses a microcycle. So after staring at the flows and pri

Re: options for replacing failed small ROMs in PDP-11

Thanks much for all the info and help, folks! I'll see about tracking one of the programmers mentioned. I'd like to have one around in case I run into more parts like these. Was helping a friend with an old arcade game last weekend, and it had a few parts like these as well. --Frit

VT52 oscillator

It seems the clock oscillator chip (E1, 13.824 Mhz) on my VT52 is flaking out. It has become very vibration sensitive. I tried reflowing its solder connections, but it has not seemed to help much... Anybody have a spare, or suggestions/advice for a replacement? There's certainly room enough

DL11 configuration for pdp11gui

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 tutorials. thanks, --FritzM.

Re: DL11 configuration for pdp11gui

On 06/26/2016 01:29 PM, Don North wrote: Console DL11 configuration (baud, #data, #stop, parity) needs to match that of the PC (baud, #data,#stop,parity) that is running PDP11GUI, and vice versa. 9600-8N2 on each end would be a good place to start (fastest baud rate, 8b, no parity) as it is ver

Re: DL11 configuration for pdp11gui

Okay, so I scoped the serial line, and the EIA line drivers seemed to be acting funny, mark voltage was way to high, etc. So checked power, and looks like I have a -15V distribution issue to the SPC slots on my backplane. Moved the DL11 over to my DD11 expansion where I already debugged -15V

Re: DL11 configuration for pdp11gui

On 06/27/2016 05:34 AM, Paul Koning wrote: How high was "too high"? The RS232 standard rules for allowed output voltages are surprisingly lenient (3 to 15 volts, positive or negative for space and mark respectively). Mark (not space) was around +3V, ha :-) I have no idea how the VT52 was mak

PDP11GUI under Wine on Linux -- extra backslash?

So, I am trying to run PDP11GUI under Wine on Linux, and I am having problems loading a machine description file. It seems when PDP11GUI tries to kick off M4, it is expanding an extra backslash into the command. So you get this sort of error message (note extra backslash before m4.bat): Can

Re: PDP11GUI under Wine on Linux -- extra backslash?

Oh, the quoting in the error message also looks suspicious. Hmm... On 06/27/2016 01:47 PM, Fritz Mueller wrote: So, I am trying to run PDP11GUI under Wine on Linux, and I am having problems loading a machine description file. It seems when PDP11GUI tries to kick off M4, it is expanding an

Re: PDP11GUI under Wine on Linux -- extra backslash?

On 06/27/2016 01:47 PM, Fritz Mueller wrote: I am trying to run PDP11GUI under Wine on Linux, and I am having problems... So, I gave up, bought a copy of Windows, installed it on a VM and now it works fine. Between this and various CAD tools, etc, tired of fighting with endless fiddly Wine

Re: Wanted: VT5x roll-around stand

On 06/27/2016 10:06 PM, Ethan Dicks wrote: ...could you measure, and/or photograph the part that the VT52 sits on? Yes please, pictures appreciated, thanks! --FritzM.

Early PDP-11/45 backplane SPC power

So, after finding that a DL11-E wasn't working in the backplane SPC slots (26-28) on my 11/45, I took a closer look. The problem isn't exactly what I had expected -- -15V seems to be distributed there, but +15 is not. Looking closely at the print sets, the listed configurations only mention

Re: Early PDP-11/45 backplane SPC power

On 06/28/2016 09:33 AM, Fritz Mueller wrote: ...the power distribution table in EK-11045-MM-007, page 510, implies that +15 should be distributed to the SPC slots on CA1. I'm wondering if this is a typo, since I'd expect that pin to be NPG? The DL11-E looks to be expecting +15 on

Re: Early PDP-11/45 backplane SPC power

On 06/28/2016 11:55 AM, william degnan wrote: DD11A or B would have power to CA1 unless you remove the wirewrap, right? The way the prints look to me, the DD11A and B take +5V on CA2, DA2, EA2, FA2, which is per normal for SPC slots that I've seen. I can't find reference to CA1 in the DD11 p

Re: Early PDP-11/45 backplane SPC power

On 06/28/2016 11:55 AM, william degnan wrote: DD11A or B would have power to CA1 unless you remove the wirewrap, right? Darn it, you said "DD" not "DL" -- I need to read more carefully before I type! Lemme take a look...

Re: Early PDP-11/45 backplane SPC power

On 06/28/2016 11:55 AM, william degnan wrote: DD11A or B would have power to CA1 unless you remove the wirewrap, right? Just checked the prints for those as well -- no power to CA1, +5V to CA2, and on the DD11B +15/+8 to CU1 throughout.

Re: Tough to Diagnose issue with PDP 11/40 CPU

Hey Bill, Do you have a KM11 maintenance card? Guy Sotomayor here sells kits and/or assembled boards at http://www.shiresoft.com/products/km11/KM11%20Replica.html. I built one up myself based on a layout by Tom Uban at http://www.ubanproductions.com/museum.html The easiest way to get to t

Re: Early PDP-11/45 backplane SPC power

Just a follow-up here: Marty over at vcfed.org took a look at his 11/45, and he does have +15 (+12 in his case) to CU1 on slots 26-28. His notes indicate a wire from slot 15 (because of his setup he can't conveniently inspect his backplane). It's not clear whether this is from factory, and ECO, or

Re: Wanted: VT5x roll-around stand

> Thanks for the info! I can check the bottom of a VT52 to see what's > there at those dimensions - feet or any corner/edge features. Anyone > have a photo handy of the bottom of a VT52? With a scale ruler? I > can take one but it'll be a week or two until I'm in the right place. Pic of botto

Re: VCF West - going?

I'm headed down from Oakland now (Sat) and will be there most of the afternoon. Looking forward to seeing all the goodies and meeting some folks!

vt100 terminfo with padding for an actual vt100?

Hi all — I’m trying to run a real-deal vt100 on a serial port connected to Linux (Xubunto 16.04). I’ve got this working *pretty* well, but it looks like the padding values in the default vt100 terminfo entry are not quite correct — when running the vt100 at 9600 I still get occasional garbage

Re: vt100 terminfo with padding for an actual vt100?

> On Sep 4, 2016, at 6:08 PM, william degnan wrote: > > Even better, I found this post, this is my how to attach a vt100 to a VAX > 4000, you can apply to most any case Hi Bill, Thanks for you help! I will say that I have the getty running fine, baud rate, serial format, etc. all okay. Wor

Re: vt100 terminfo with padding for an actual vt100?

Hi all, thanks for the help/advice! Peter, the table you posted comes closest to what I was originally looking for. I think I will end up just doing some testing to identify the troublesome control sequence and find out how much padding is needed in each case. I’ll post back the numbers I fin

bitsavers FP11-B schem: M8115-0-01 sheets 1 and 2 missing?

Hi all, I’m working on debugging an FP11-B floating point option in a PDP-11/45. I’ve just discovered that in the engineering drawings for this on bitsavers, sheets 1 and 2 of the FRL board prints are missing :-( Does anybody have a complete set of FP11-B drawings? I can work around the miss

Re: bitsavers FP11-B schem: M8115-0-01 sheets 1 and 2 missing?

> On Sep 13, 2016, at 10:55 AM, Jay Jaeger wrote: > > On 9/10/2016 10:09 PM, Fritz Mueller wrote: > >> Does anybody have a complete set of FP11-B drawings? > > I have scanned in my (complete) copy. It is available in > > https://drive.google.com/open?id=0B2v4WR

Re: Is anyone making replacement clear labels for DEC gear?

Hi Ethan, On my 11/45, the big power supply regulator stickers on the back of the CPU cabinet were also badly damaged. As part of my restore, I went to some effort to make suitable replacements. The originals were white on clear. I found that stickeryou.com did a nice job with white on clear

Re: Unibus disk controller with modern storage

On Oct 19, 2016 6:48 PM, "shad" wrote Hello, I read several posts about Unibus disk interfaces and emulation. One of my retrocomputing dream is to design an Unibus universal board, probably based on FPGA because of precise timing requirements, to emulate one or more disk/tape interfaces, and

Re: Double Buffer RK11-C

So, the RK11-C disk controller page over at gunkies says “no [indicator panel] inlay for such has even been sighted…”. But then over at bisavers, I see this: http://bitsavers.trailing-edge.com/pdf/dec/pdp11/pictures/1120_RSTS-11/1120_RK_Panel_RSTS-11.jpg

Re: Double Buffer RK11-C

> On Dec 5, 2016, at 11:32 AM, Noel Chiappa wrote: > > (This whole process makes me feel like a paleontologist, reconstructing some > unknown dinosaur from a fragment of one bone, using a lot of complex reasoning > from small clues contained therein! :-) Yeah, I find this sort of thing really f

Re: Double Buffer RK11-C

> On Dec 6, 2016, at 7:51 AM, Noel Chiappa wrote: > > [data fetch] can't be off-loaded onto a separate interface unit, as it needs > access to > register contents held in the CPU. Yeah, it’s pretty interesting! My guess would be that it was a separate register/command oriented interface, sit

Re: Anyone want an RK11-C manual?

> Is anyone here qinterested in having it? Preferably somehow who actually has > an RK11-C - I know there's at least one person on CCTalk who has one. Hi Noel — I have an RK11-C (and two RK05s) that I am just about to dive in on. I would appreciate this document, unless it is needed for scanning

WTB: DEC M105 + M7821

Hi folks: I've been thinking about trying some PDP-11 interfacing/emulation projects in the new year. I'd like to track down a an M105 address selector and an M7821 (or M7820) interrupt control to keep things simple to start with. Anybody have surplus of these they'd be willing to sell/trade?

Re: WTB: DEC M105 + M7821

> On Dec 31, 2016, at 4:09 PM, Noel Chiappa wrote: > > These are pretty easy to find on eBait. Ah, for some reason when I searched earlier I came up empty? But indeed there was an M105 up there for < $20 with shipping, so I snagged that! I’ll keep an eye out for the interrupt control module

FTGH: iMac G3

Hey folks, Helping my ex clean out her basement, she had a 1999 tray-loading "lime" iMac G3 that she no longer wanted. The machine is complete w/ original keyboard, mouse, and power cord. Boots and runs MacOS 9.2. CRT is arcing occasionally (probably dust around the flyback?) I'm not a Ma

PDP-11: BC11-A cable dress between cabinets

Hey folks, I've gotten to the part of a PDP-11/45 restore I’ve been working on where I need to run a Unibus cable between the CPU box in one rack and an RK11-C controller at the top of the next rack over. I'm a bit puzzled about how best to run the bus cable to keep it out of harm's way, e.g. g

crimp connectors that fit over wire wrap posts

Hi all, I’m working on an RK11-C, and need to repair a couple of components that are flown between backplane pins via crimp terminals that slip directly onto the wire wrap pins. I’m having trouble sourcing these connectors, probably because I don’t know the correct terms to search under. Anyb

Re: crimp connectors that fit over wire wrap posts

> On Jan 28, 2017, at 1:50 PM, Chuck Guzis wrote: > > Wouldn't those be plain old 0.025" square socket pins on a strip? > > http://www.ebay.com/itm/Gold-plated-025-Square-Female-Socket-pins-100-each-/222059011669?hash=item33b3bf9e55%3Am%3Amkh7h_knuzj5K39hpUzgHaQ Yes, thank you!! For some reas

Re: Logic Analysers

I bought a used 1662 off eBay for cheap, and it has been indispensable for the work I've been doing on a PDP-11. I think the external clock is often a pretty critical feature in being able to sensibly interpret traces. Sophisticated triggering is also very useful for catching a suspected misb

Re: Is The M9312 Boot Module Essential?

> On Feb 19, 2022, at 10:51 AM, Noel Chiappa via cctalk > wrote: > The -11/34 (not the /34A) has something unusual for grant timeouts, but I > forget the details. I'll look it up. I just did an 11/34 restoration last year, so this is fresh in mind — I think you are thinking of the M9302, Noe

Re: Is The M9312 Boot Module Essential?

> On Feb 19, 2022, at 10:51 AM, Noel Chiappa via cctalk > wrote: > The -11/34 (not the /34A) has something unusual for grant timeouts, but I > forget the details. I'll look it up. > On Feb 19, 2022, at 12:11 PM, Fritz Mueller wrote: > I just did an 11/34 restoration last

DEC VT52 CRT anode connection

Hi folks, I’ve begun some work on a VT52, and need to get the power supply board out onto my bench for some work. For those who have been in here before: is there a way to detach the HV anode lead at the board side (does the white “cap” come off the lead connector?) Or is the only option to u

Re: DEC VT52 CRT anode connection

> On Feb 20, 2022, at 10:27 PM, Fritz Mueller wrote: > I’ve begun some work on a VT52 ... is there a way to detach the HV anode lead > at the board side (does the white “cap” come off the lead connector?) Well, just answered my own question — went back and tried to be a little more

More VT52 HV

So, having pulled the CRT now , I was surprised to see that the ground braids seem to be held against the aquadag by only the pressure from a couple foam blocks! In my unit these aged foams are deformed and brittle. This would seem a good thing to add to the check list for looking at these…

Re: Is The M9312 Boot Module Essential?

>> From: Fritz Mueller >> I think you are thinking of the M9302, Noel: a far-side terminator card >> with integrated SACK turnaround? > On Feb 21, 2022, at 7:19 AM, Noel Chiappa via cctalk > wrote: > No; the M8264 Sack Timeout module. What's an M8264, you say? ..

Re: Is The M9312 Boot Module Essential?

> On Feb 21, 2022, at 10:29 AM, Fritz Mueller wrote: > Also, in taking a look this morning at the M9302 schematic around page 70 in > the commonly available 11/34 engineering drawings set (rev B, Sep 76), there > appears to be a mistake! The output of the SACK turnaroun

Re: Is The M9312 Boot Module Essential?

> On Feb 24, 2022, at 8:24 PM, Noel Chiappa via cctalk > wrote: > … at first I thought that maybe you were thinking of the M7850 Parity > Controller (which is > actually a memory option, not KD11-E/EA specific; more below), but that's a > dual card. Yes, I was thinking of the M7850, but I had

Re: Is The M9312 Boot Module Essential?

> On Feb 26, 2022, at 2:19 AM, Noel Chiappa via cctalk > wrote: > So, either (console halt, or a HALT instruction) will cause the identical > response in the processor; see Section 4.10.3 "Halt Grant Requests": the CPU > sends HLT GRANT to the console, which returns SACK. As long as SACK is > a

[cctalk] Re: Connecting a physical terminal via LAN to Serial Port

> On Sat, Jul 30, 2022 at 10:23 PM Ali via cctalk wrote: > So I am wondering if there is a box that provides a telnet CLIENT to a > serial port device? I.E. a box smart enough that handles the telnet client, > LAN functions, and terminal emulations internally and then provides a text > based in

[cctalk] Re: Great Vintage Computer Heist of 2012

> On Oct 19, 2022, at 6:16 AM, Paul Koning via cctalk > wrote: > ...a couple of years ago I wrote an article about the invention of FM radio, > in Holland in 1919 (no, not by Armstrong in the USA in the late 1920s). That sounds interesting, Paul — I’m only familiar with the usual USA-centric

[cctalk] Re: DLV11 M7940 SLU header wire colours?

> On Dec 21, 2022, at 7:16 PM, Steve Malikoff via cctalk > wrote: > > For a DLV11 EIA serial connection, I am about to wire up a fly lead cable to > go from an M7940 SLU (no dash version) 40-pin header to a DB25P … I could use > any colours but I'd really like to use the original colours for

[cctalk] flipchip cleaning and pin corrosion inhibition

Hi folks, I’ve been picking my way through a PDP-8/L restoration lately. I’ve found that everything in the machine is covered with a uniform layer of dark “soot” (enough to blacken your hands while working with it) which I would like to clean up. Perhaps the “soot” is actually from a decompos

Re: Cleaning RK05 packs

> On Jan 5, 2017, at 8:48 AM, Rick Bensene wrote: > > The method I've used very successfully for unknown packs is: > > 1) I first mount the pack in a drive that has a good absolute filter, > and has had the head load disabled, and spin it for a few hours. I’m getting to the point in my RK05 re

Re: Cleaning RK05 packs

> On Apr 1, 2017, at 2:53 PM, Marc Howard wrote: > > BTW, have you replaced the emergency head retract batteries and/or allowed > them to reach full charge? Yes, have done replacement. Haven’t put a charge on them yet, but figured running the drive for a couple hours with disabled head load

Re: Cleaning RK05 packs

The first two packs I opened up for cleaning had foam around the inside of the hub. If it is decaying like the rest of the foam DEC used this seems like it could be a problem inside the packs? I haven’t seen this discussed before in any of the RK05 pack cleaning threads. Do folks usually leav

M9301-YB ROM flaky

Hi folks, An M9301-YB bootstrap terminator that I’ve been using during the restoration of a PDP-11/45, which has previously worked fine, now seems to be failing on me. Examining the contents from the front panel I see a few words with different values than the ones that Noel has listed in his

Re: M9301-YB ROM flaky

Hi folks, thanks for all the help! > On Jul 4, 2017, at 8:34 AM, Noel Chiappa via cctalk > wrote: > >> I see a few words with different values than the ones that Noel has >> listed in his partial M9301-YB disassembly. > > Any chance you could send in some of the differences? I can take a look

Re: M9301-YB ROM flaky

Well, the situation had worsened on my M9301 to the point where every single word was affected, and then it was easy to see that it was always in the least-significant four bits. So I pulled and reseated that PROM, then went ahead and did the other three as well for good measure (really should

In search of DEC DZ11 cabling/panel

Hi folks, I'm in need of cabling and a distribution panel for a DEC DZ11 serial mux that I'd like to put in a PDP-11/45. Before I embark on building something up from scratch I thought I'd ping here and see if anybody had all or part of this on hand and would be willing to work out a deal? Hi

Re: In search of DEC DZ11 cabling/panel

> On Jul 22, 2017, at 3:42 PM, John Wilson via cctalk > wrote: > > I don't have anything to spare, but you need to say whether you mean > DZ11A (EIA) or DZ11C (20 mA) before anyone can hook you up, since > they're entirely different cab kits. Oh, yes -- I mean the DZ11A (EIA). Sorry I forgot t

Re: In search of DEC DZ11 cabling/panel

> On Jul 23, 2017, at 9:04 AM, Noel Chiappa via cctalk > wrote: > > Here ya go: > > http://www.ebay.com/itm/321225351590 Oh, great -- thanks! I'll make an offer on one of those. I'd still like to keep an eye out for an H317-E, since my /45 is in H960 19" racks, but this will help to get

Re: In search of DEC DZ11 cabling/panel

Update: have now tracked down an H317-E, from a list-member. Thanks, all!

RK05 head alignment -- how difficult?

Hey folks: As some of you know, I've recently restored a PDP-11/45, RK11-C drive controller, and an RK05 drive. I'm now at the point where I'm working to recover and archive the contents of the dozen or so RK05 packs that I got along with the drive and controller. I've been inspecting and cle

Re: RK05 head alignment -- how difficult?

Thanks for the advice, per usual, folks! To answer the question of "where hard to see", I guess it's really an issue of my old-man-eyes at this point. I find I need to use a jeweler's headset, or even bench microscope, to really see anything small in detail these days. It's hard to do that wi

Re: RK05 head alignment -- how difficult?

Thanks for the advice, per usual, folks! To answer the question of "where hard to see", I guess it's really an issue of my old-man-eyes at this point. I find I need to use a jeweler's headset, or even bench microscope, to really see anything small in detail these days. It's hard to do that wi

Re: RK05 head alignment -- how difficult?

> On Jul 24, 2017, at 2:25 PM, Noel Chiappa via cctalk > wrote: > > http://gunkies.org/wiki/File:RK05Head.jpg > http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/RK05HeadRefl.jpg Thanks, Noel, that's very helpful! A recent picture of the upper head in my drive: http://www.slac.stanford.edu/~f

PDP-11: DR11-C to FPGA or 1284?

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, however, have a couple of DR11-C parallel interface cards

Re: PDP-11: DR11-C to FPGA or 1284?

> 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 DR11-C (not using DMA) > to the Arduino. Awes

Re: PDP-11: DR11-C to FPGA or 1284?

> On Jul 31, 2017, at 11:30 AM, Bill Gunshannon via cctalk > wrote: > > Well, I'm confused now. What do 16 bit paralel and ethernet have to do with > each other? Nothing, directly; confusion created by poor quoting on my part, probably! The goal is a higher-bandwidth and higher-convenience

Re: PDP-11: DR11-C to FPGA or 1284?

On 07/31/2017 12:15 PM, Don North wrote: Arduino UNO (the 'original') and the Mega2560 big brother both use 5V I/O microprocessors, so all the I/O is directly 5V capable. Awesome, that seems like the way to go, then -- just need to bodge the appropriate cables. I'll check it out! --FritzM

Re: homebrew PDP-11 bus adapters - was Re: PDP-11: DR11-C to FPGA or 1284?

On 08/01/2017 10:16 AM, Al Kossow via cctalk wrote: Another stillborn project? I don't see any software to make the Beaglebone talk Unibus Yes, this one has been around for a couple years now but sadly doesn't seem to have progressed...

Re: PDP-11: DR11-C to FPGA or 1284?

On 08/01/2017 01:23 PM, Jay Jaeger wrote: I have posted my code (and pinouts) on Google Drive at: https://drive.google.com/open?id=0B2v4WRwISEQRUUxuNGhZRENvYjQ Thanks, Jay -- I'll check it out! Mattis: I *do* have a DELUA, actually, but haven't slotted it yet to check it out. Your suggest

Re: PDP-11: DR11-C to FPGA or 1284?

On 08/01/2017 05:27 PM, Jerry Weiss wrote: If you install the DELUA, don’t forget there is TCP/IP support for RT11 from Alan Baldwin at http://shop-pdp.net/rthtml/tcpip.htm. Hi Jerry -- I had seen the RT-11 TCP/IP stuff, but my 11/45 can only address 256K of memory, so doesn't meet the minimum

Re: PDP-11: DR11-C to FPGA or 1284?

> On Aug 1, 2017, at 7:37 PM, Jerry Weiss wrote: > > It is possible to install the TCP/IP Package on a 248K > machine using the DEUNA/DELUA 18-bit (Non Unibus Map- > ping) EU18XM.SYS handler. Thanks Jerry, I'll check that out. Might also be a bit of work to

Re: Anyone need an M7389 card (for an LA30)?

On 08/17/2017 12:54 PM, Noel Chiappa via cctalk wrote: Anyone out there have an LA30? :-) For future reference, I am also working on an LA30 at the moment. I think Mattis has restored one as well? Mine is a P, and I have the matching M7910 to go with it, so no need for an M7389 here (sound

Re: Anyone need an M7389 card (for an LA30)?

> On Aug 19, 2017, at 10:10 PM, Mattis Lind wrote: > > BTW. I have LC11 manual and drawings. But they are for the older M791. At > least a bit helpful. Not scanned yet. I'd be very interested to see those once scanned. I haven't gotten to the interface card yet; so far I've just been working

LA30 parts and question

Hi folks, I'm picking my way through an LA30 restoration right now. It was pretty filthy, so I've needed to pretty thoroughly disassemble it for proper cleaning. I noticed that a few of the thin steel ribbon springs in the paper path are missing or broken on my unit, and some of the rubber

Re: LA30 parts and question

Hi all, an update on the sourcing questions below: > On Nov 11, 2017, at 5:53 PM, Fritz Mueller wrote: > > I noticed that a few of the thin steel ribbon springs in the paper path are > missing or broken on my unit, and some of the rubber bushings have hardened > and deteriora

LA30 restore complete

Got the last replacement components I needed for my LA30 restore today, and finished it up! Here's a short video of the LA30 connected as console to my restored PDP-11/45: https://www.youtube.com/watch?v=gMIL2bvUYIs

Re: LA30 restore complete

Hi Henk, On 12/10/2017 04:08 AM, Henk Gooijen wrote: One question: where did you find paper for this printer. It is not a “standard” format … I have about a third of a box of paper that came with the LA30 when I picked it up from surplus many years ago. I've ordered a new box of paper from

Re: Restoring a VT50 (VT52 actually) .

Hi Mattis, > On Dec 23, 2017, at 12:08 AM, Mattis Lind via cctalk > wrote: > > Anyhow, the VT52 boards are dead. … The terminal uses 4 pieces > of 256 by 4 bipolar PROMs for a total of 512 bytes of microprogram. > Has anyone dumped the contents of these so I could verify them? I have a restore

Re: Restoring a VT50 (VT52 actually) .

The most documentation I’ve seen re. the PROMs is pages A-1 and A-2 of the VT52 maintenance manual here: http://www.pdp8.net/pdp8cgi/query_docs/tifftopdf.pl/pdp8docs/ek-vt52-mm-002.pdf I think you’ve probably seen that already. I’ll post more info from my VT52 later when I make it downstairs t

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

> On Sep 6, 2023, at 10:08 AM, Paul Koning via cctalk > wrote: > "On what model and under what circumstances will the PC increment by 1?" At least true on a KD11-B when executing code out of the memory-mapped register file :-) (I just happen to have been wading through one of these a couple

[cctalk] Re: Vintage Computer Fest Midwest "DECnut" pizza party

> On Sep 6, 2023, at 12:48 PM, Paul Koning via cctalk > wrote: > > The weird case of the 11/05 is because the general registers are assigned > addresses 177700 through 177707 for R0 through PC, so R1 is at 177701 even > though it's a word wide. On most models those addresses only work from

[cctalk] vt220 firmware source?

Hi folks, I’m working on a vt220 debug/repair and have gotten to the point where I need to trace firmware execution at boot. I’ve managed to dump the proms (close to but slightly different from the versions in Lars’ GitHub) and the 8051 internal rom, and can load and disassemble these with the

[cctalk] Re: ADM3a screen rot.

> On Jan 29, 2024, at 9:54 AM, William Sudbrink via cctalk > wrote: > ...the anode cap on the leaking CRT had gone rock hard and there was a small > "streak" on the back of the CRT that looked like the plastic that it was made > of had released some sort of oil… Often times dielectric grease

[cctalk] teletype roll as an RF termination load

So, I recently salvaged a pair of ASR 33s and a PDP-8/I from a research lab where I work. A few folks chimed in on the "anybody want this" thread, but I happened to be the lucky winner (not lucky for my back or my basement, but they will be fun restoration projects.) One of the engineers here

[cctalk] Re: teletype roll as an RF termination load

> On 6/12/2024 8:28 PM, mark audacity romberg via cctalk wrote: > Yeah, something’s missing here, teletype paper is for sure not good as a > dummy load. Sounded pretty strange to me, but the commenter is a fairly accomplished person in the accelerator electronics and detector division, and the

PDP-11/45 RSTS/E boot problem

Hi all, Some here may know I’ve been working on an 11/45 restoration off and on for some time now. My ’45 currently has floating point, KT11-C mem mgmt, 124 kword MS11-L, and an RK11-C with one restored RK05 drive. Last week I decided to see if I could bring up RSTS/E on the machine. I managed

Re: PDP-11/45 RSTS/E boot problem

> On Dec 31, 2018, at 1:54 PM, Paul Koning wrote: > > The standard idle pattern is in the data lights. I don't remember if the > "fancy" pattern appeared in V7.0 or earlier, but in any case it's an > undocumented SYSGEN option. > > In RSTS/E, the display register shows the system error coun

Re: PDP-11/45 RSTS/E boot problem

> On Dec 31, 2018, at 5:15 PM, Paul Koning wrote: > >> On Dec 31, 2018, at 6:32 PM, Henk Gooijen via cctalk >> wrote: >> >> There are one or two bits in a register of the RK11 that have a different >> meaning/function, depending on the controller being a -C or -D. The RK11-C >> was quickly

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