Re: IBM PC diagnostics disks

On 8/10/2021 10:30 PM, Jay Jaeger via cctech wrote: On 7/29/2021 1:22 PM, Mark Huffstutter via cctech wrote: Yes, I sadly, learned that important lesson years ago, after finding My "Original" Original PC DOS diskette set pretty much destroyed, left in The folders in storage for too long.

Re: Ultrix-11

On 8/14/2021 11:53 PM, Warner Losh via cctalk wrote: On Sat, Aug 14, 2021 at 3:26 PM jim stephens via cctalk < cctalk@classiccmp.org> wrote: > I'm running Ultrix V2 on Simh quite happily today and have a couple I did some quick searching and couldn't find a Ultrix-11 V2 image out in the

Re: Ultrix-11

> On Aug 15, 2021, at 10:08, Bill Gunshannon via cctalk > wrote: > > On 8/15/21 12:45 AM, Warner Losh via cctalk wrote: >>> On Sat, Aug 14, 2021 at 2:36 PM Warner Losh wrote: >>> >>> >>> On Sat, Aug 14, 2021, 2:08 PM Douglas Taylor >>> wrote: >>> On 8/14/2021 1:54 PM, Warner Losh

Call for manuals and maybe floppies: IBM 8100

My next project once I finish my IBM 1410 FPGA implementation (so, a couple of years out, probably) would be to write an emulator for the boat anchor known as the IBM 8100. I had exposure to these things back in the 1980s. The project was not really a success: the DPPX operating system was

Re: CWVG

On 8/25/2021 5:58 PM, Mike Loewen via cctalk wrote: On Wed, 25 Aug 2021, Dennis Boone via cctalk wrote:    As a few of the signals on the 34-pin connector are different than the Shugart layout, I'm considering making up a custom cable and connecting it to my Catweasel MK4+. I have a

Re: CWVG

On 8/25/2021 3:57 PM, Fred Cisin via cctalk wrote: On Wed, 25 Aug 2021, Jay Jaeger via cctalk wrote: I don't have that code, however a couple of points: First of all, I think Vector Graphic actually used Micropolis drives (and I suspect yours are because of the hard sectoring).  I have

Re: CWVG

On 8/27/2021 10:08 PM, Jay Jaeger via cctalk wrote: On 8/26/2021 2:51 PM, Jay Jaeger via cctech wrote: On 8/25/2021 5:58 PM, Mike Loewen via cctalk wrote: On Wed, 25 Aug 2021, Dennis Boone via cctalk wrote:     As a few of the signals on the 34-pin connector are different than

Re: Call for manuals and maybe floppies: IBM 8100

On 8/26/2021 7:54 PM, Paul Berger via cctalk wrote: On 2021-08-26 6:48 p.m., Jay Jaeger via cctech wrote: My next project once I finish my IBM 1410 FPGA implementation (so, a couple of years out, probably) would be to write an emulator for the boat anchor known as the IBM 8100.  I had

Re: Call for manuals and maybe floppies: IBM 8100

On 8/28/2021 2:25 PM, Al Kossow via cctalk wrote: On 8/28/21 12:11 PM, Jay Jaeger via cctalk wrote:  also looked at some field service material available on archive.org. Was this different from the docs I have on bitsavers? They have all of bitsavers, but changed the filenames and screwed

Re: CWVG

On 8/28/2021 2:27 PM, Al Kossow via cctalk wrote: On 8/28/21 12:12 PM, Jay Jaeger via cctalk wrote: I have successfully read a couple of Mod I disks (143KB).  But some have not read very well. I played with one when they came out. The software wasn't ready for prime time. I had hoped

Re: CWVG

On 8/28/2021 3:06 PM, Chuck Guzis via cctalk wrote: On 8/28/21 12:27 PM, Al Kossow via cctalk wrote: On 8/28/21 12:12 PM, Jay Jaeger via cctalk wrote: I have successfully read a couple of Mod I disks (143KB).  But some have not read very well. I played with one when they came out

Re: Extremely CISC instructions

On 8/23/2021 8:51 PM, Van Snyder via cctech wrote: On Tue, 2021-08-24 at 01:38 +0100, Tom Stepleton via cctalk wrote: For the sake of illustration to folks who are not necessarily used to thinking about what computers do at the machine code level, I'm interested in collecting examples of single

Re: CWVG

I don't have that code, however a couple of points: First of all, I think Vector Graphic actually used Micropolis drives (and I suspect yours are because of the hard sectoring). I have Micropolis drives on my Altair. Back in 2006 I imaged my floppies - by reading the sectors on my Altair

Re: CWVG

On 8/28/2021 5:14 PM, Chuck Guzis via cctalk wrote: On 8/28/21 3:01 PM, Jay Jaeger via cctalk wrote: Back in 2005 I imaged both my Mod I and Mod II floppies using my Altair and a program I wrote way way wayy back when for transferring floppy images called "XMT".  But I lik

Re: VAX4000 VLC diagnostics/console

On 7/14/2021 12:32 PM, Adrian Graham via cctalk wrote: VT100 to the rescue, the VLC is fine talking to it so now I'm wondering why my old faithful hardware UART in this PC I'm typing on now has let me down. The BlueSCSI appears as 7 devices though, which is usually a termination or ID problem

Re: VAX4000 VLC diagnostics/console

On 9/4/2021 5:44 AM, Adrian Graham wrote: On 4 Sep 2021, at 02:42, Jay Jaeger via cctalk <mailto:cctalk@classiccmp.org>> wrote: On 7/14/2021 12:32 PM, Adrian Graham via cctalk wrote: VT100 to the rescue, the VLC is fine talking to it so now I'm wondering why my old faithful hard

Re: VAX4000 VLC diagnostics/console

On 9/5/2021 8:12 AM, Peter Corlett via cctalk wrote: On Sat, Sep 04, 2021 at 09:34:30AM -0400, emanuel stiebler via cctalk wrote: On 2021-09-04 08:30, Antonio Carlini via cctalk wrote: "Digital Diggings" couldn't get BlueSCSI to work on either VAX or Alpha:

FTGH: 19" Intergraph Monitors

I have an Interpro 2020 and a couple of HUGE 19" inch Intergraph monitors. Frankly they are pretty lousy (fuzzy, not all that luminescent), heavy and awkward. Free to a Good Home - cables included. But I won't ship them, though one could pay someone to crate them up and ship them. I

Re: Classic sale/give-away Jefferson, WI USA

On 9/18/2021 12:25 PM, John Foust via cctalk wrote: Given the hot real estate market, I've received an unsolicited offer to purchase my office building and I'd like to accept it. Real life. This means disposing of a great deal of classic computer stuff in the next 30 days. I need to let

Re: Unix or BSD for Dec PDP 11/34 and 11/45

On 9/17/2021 6:37 AM, devin davison via cctalk wrote: Hello, If possible too, id like to be able to telnet in to unix or bsd.I was also curious if a ethernet interface exists for my unibus systems, or if i could SLIP/PPP serial to another machine,so i could telnet in as well as use dumb

Re: Help reading a 9 track tape

I know Paul well (we were contemporaries at U. WI). He does not do that very often. He did not indicate any issue with a fire at the building that contains his collection when I last spoke with him. He does not actually read "blocks". He reads the tape in an *analog* fashion, and then

Re: Help reading a 9 track tape

Yeah, well, the first part is the hard part - setting it all up and making recording. The second part is more or less trivial, once the software was done. One of the 1410 tapes had a persistent parity error - that one I was able to figure out from knowledge of the machine, instruction set,

Re: Help reading a 9 track tape

Some thoughts On 8/4/2021 4:14 PM, Chuck Guzis via cctech wrote: Whoever does it, I have a few suggestions when it comes to 40+ year old tapes. 1) Bake the thing at 58C for a day or two. It might just prevent you from staring at a tape stuck to the head and a pile of brown dust at the bottom

Re: Help reading a 9 track tape

On 8/5/2021 9:28 AM, James Liu wrote: On Wed, Aug 4, 2021 at 10:25 AM Jay Jaeger wrote: Thanks, Jay (and others) for offering your assistance. I've asked Chuck to have a look at the tape, and we'll see how it goes. Great! Given the name "IEBUPDTX" this tape was certainly intended to

Re: DQ11 prints needed

ROTFL - especially given the earlier case, and since Noel knows about you folks quite well.. Typically I search the "mirror" on my drive first (which I update about once/year), then if I come up empty, search the bitsavers site. BTW I hope to scan the Xenix manuals tomorrow. If not, it will

Re: Help reading a 9 track tape

On 8/6/2021 12:21 PM, John Foust via cctalk wrote: At 11:45 AM 8/6/2021, Jay Jaeger via cctalk wrote: On 8/5/2021 2:57 PM, Len Shustek via cctalk wrote: On Aug 5, 2021, at 8:39 AM, Jay Jaeger via cctech wrote: I know Paul well (we were contemporaries at U. WI). Where did Paul work at UW

Re: IBM PC diagnostics disks

On 7/29/2021 1:22 PM, Mark Huffstutter via cctech wrote: Yes, I sadly, learned that important lesson years ago, after finding My "Original" Original PC DOS diskette set pretty much destroyed, left in The folders in storage for too long. -Original Message- From: cctalk

Re: DQ11 prints needed

On 8/10/2021 6:30 PM, Noel Chiappa via cctalk wrote: > From: Jay Jaeger > ROTFL - especially given the earlier case, and since Noel knows about > you folks quite well.. The joke's actually on you: DQ11_RevL_Engineering_Drawings_Aug75.pdf 2021-08-09 14:05

Re: Help reading a 9 track tape

James, I am located in Madison WI. I would need to fire up my SCSI 9 Track drive (software on Linux) and test it as I have not used in a couple of years, but I have done recovery of old tapes from this era before, and have a primitive setup for "baking" tapes before trying to read them.

Re: Help reading a 9 track tape

On 8/5/2021 2:57 PM, Len Shustek via cctalk wrote: > On Aug 5, 2021, at 8:39 AM, Jay Jaeger via cctech wrote: > I know Paul well (we were contemporaries at U. WI).  He does not do that very often.  He did not indicate any issue with a fire at the building that contains his collection when I

Re: Linux and the 'clssic' computing world

On 9/28/2021 2:15 PM, ben via cctalk wrote: On 2021-09-28 11:43 a.m., Vincent Long standing via cctalk wrote: The C standards are more liberal, and continue to require char types to be 8 or more bits. Was PL/I the only language that would let you select data size for variables? Of course

Re: PDP-11/05 Fault?

On 9/29/2021 6:31 PM, Matt Burke via cctalk wrote: I've been restoring a PDP-11/05 recently and after replacing several faulty ICs I have it mostly working. I've run into a bit of a problem whilst running MAINDEC-11-D0NB (T14 TRAP TEST) though. The failing instruction sequence is: 7200:   MOV

Re: scanning a ton of documentation

> On Sep 22, 2021, at 14:05, devin davison via cctalk > wrote: > > Hello, > > The person that refered me to my present job at a datacenter passed away > this past monday. He was a hardware / software engineer for modcomp > computers. He left me all of the computers and documents. there are

Re: PDP-11 Unix V7M-11 V1.0 under SIMH

On 10/3/2021 1:31 AM, Tony Nicholson via cctalk wrote: Recently Al Kossow made available a zip file containing a Micro/PDP-11 installation kit for Unix V7M-11 V1.0 on bitsavers as RX50 disk images. Tinkering away here in Covid lockdown, I've managed to get this running under SIMH pdp11

Re: PDP-11 Unix V7M-11 V1.0 under SIMH

On 10/4/2021 6:26 PM, Tony Nicholson via cctalk wrote: *Neat*! I was thinking of trying to lay this down on a real 11/23+ here at the house, then realized I didn't have two RD51's. Can it gen on an RD53 by chance, I could upload one of those to a disk in a weekend or immediately with the Dave

Re: CWVG

On 8/26/2021 2:51 PM, Jay Jaeger via cctech wrote: On 8/25/2021 5:58 PM, Mike Loewen via cctalk wrote: On Wed, 25 Aug 2021, Dennis Boone via cctalk wrote:     As a few of the signals on the 34-pin connector are different than the Shugart layout, I'm considering making up a custom cable

Re: PDP-11/70 Boards

On 11/29/2021 7:32 AM, Ed C. via cctalk wrote: Dear list, I'm currently restoring a PDP-11/70 system and need the following boards to complete the CPU: FP11-C slots: M8127 M8128 M8129 Cache slots: M8142 M8143 M8144 M8145 Any help finding these is appreciated. Thanks. I have M8127, M8128,

Re: PDP-11/70 Boards

On 11/29/2021 7:32 AM, Ed C. via cctalk wrote: Dear list, I'm currently restoring a PDP-11/70 system and need the following boards to complete the CPU: FP11-C slots: M8127 M8128 M8129 Cache slots: M8142 M8143 M8144 M8145 Any help finding these is appreciated. Thanks. I presume you'd also

Re: PDP-11/70 Boards

On 11/29/2021 7:32 AM, Ed C. via cctalk wrote: Dear list, I'm currently restoring a PDP-11/70 system and need the following boards to complete the CPU: FP11-C slots: M8127 M8128 M8129 Cache slots: M8142 M8143 M8144 M8145 Any help finding these is appreciated. Thanks. So, it turns out that

Re: PDP-11/70 Boards

On 12/1/2021 11:55 AM, Noel Chiappa via cctalk wrote: > From the blog of someone who got a KB11-A working It's Fritz Mueller's blog; at about the top of this page: https://fritzm.github.io/category/pdp-116.html he's just turned the machine on for the first time, and you can follow as

Re: TU56 DECtape takeup reel needed

On 12/12/2021 1:08 PM, Alan Frisbie via cctalk wrote: I just unpacked the rack with my TU56 DECtape drive and discovered that the movers managed to break the takeup reels.  This, despite many layers of foam padding, stretch film, and warning signs.  On the other hand, this was the only item that

Re: LINCtape images

On 10/29/2021 7:22 AM, Christian Corti via cctalk wrote: Short question: How do I transfer LINCtape images back to tape on a PDP-12? Ideally there is some binary program to load via papertape to format a tape and recreate it with data transfer over the console serial line. Christian Here

Re: LINCtape images

On 11/3/2021 12:25 PM, Christian Corti via cctech wrote: On Wed, 3 Nov 2021, Jay Jaeger wrote: It seems you didn't notice that I included two separate programs in my previous post:  XMTAPE and CMPTAP  ;) I did, and I have found an error ;-) 0275  0361 7300  #WDFLSH CLA CLL 0276  0362

Re: LINCtape images

On 11/3/2021 3:27 AM, Christian Corti via cctalk wrote: On Tue, 2 Nov 2021, Jay Jaeger wrote: Here is a program I wrote for reading/writing tape images via XModem protocol for my PDP-12, and another for comparing two linctapes. This is fantastic, thanks :-) I hope this will help us in

Re: LINCtape images

On 11/2/2021 9:53 PM, Vincent Slyngstad via cctalk wrote: On 11/2/2021 2:25 PM, Jay Jaeger via cctalk wrote: Here is a program I wrote for reading/writing tape images via XModem protocol for my PDP-12, and another for comparing two linctapes. Cool!  I was able to recover the code and convert

Re: TU58 / DECtape II: Capstan goo

On 12/7/2021 4:38 PM, Jan-Benedict Glaw via cctalk wrote: Hi! Some time ago, I got my hands on a DECtape II, though no tapes. That'll change after a long time and in a few days, even multiple tapes will come in. With that drive, I started some first tests. It's PSU seems to be all fine,

Re: RC11 controller (Was: Reproduction DEC 144-lamp indicator panels)

On 12/9/2021 7:49 PM, Noel Chiappa via cctalk wrote: > From: Steven Malikoff > Was there ever an indicator panel for the RC11? .. I have a set of RC11 > modules .. No backplane though. I've not found any docs for these, I suppose > they're probably on bitsavers and have

Re: RK11-C indicator panel inlays?

I would be interested in an inlay - I have an RK11-C, but no indicator panel. Also, if someone (else, presumably) does up a replica of the indicator panel board (perhaps with the option to use LEDs, with some resistor packs that could be bypassed for lamps), I'd be interested in that, too.

Re: PDP-11/70 Boards

On 12/5/2021 3:37 AM, Rob Jarratt via cctalk wrote: Thanks for the tips. The transformer that drives the bricks is a real beast. Did you find an alternative more convenient way to power them on the bench? From the schematics, some of them seem to want 20-30 VAC (some, like at least one of

Re: PDP-11/70 Boards

On 12/4/2021 5:57 PM, Rob Jarratt wrote: What kind of load tester are you looking to buy? I have an 11/45 which I need to test the power supplies on too. Oh just one off of amazon, I expect. One could either get a nice one in a cabinet at all for around $280 - $350, depending upon

Re: RC11 controller (Was: Reproduction DEC 144-lamp indicator panels)

On 12/9/2021 11:06 PM, Guy Sotomayor via cctalk wrote: On 12/9/21 8:15 PM, Jay Jaeger via cctalk wrote: One could perhaps emulate the RS64 data stream using a fast-enough micro, ala the MFM emulator. Why does everyone seem to want to emulate HW like this with a micro when a reasonable

Re: PDP-11/70 Boards

On 11/30/2021 2:04 PM, Fritz Mueller via cctalk wrote: On 11/30/21 10:06 AM, Noel Chiappa via cctalk wrote: From the blog of someone who got a KB11-A working, you'll really need KM11 cards... On Nov 30, 2021, at 10:59 AM, Guy Sotomayor via cctalk wrote: I do still have KM11 boards and

Re: PDP-11/70 Boards

On 11/30/2021 3:52 PM, Henk Gooijen via cctalk wrote: Van: Fritz Mueller via cctalk Verzonden: dinsdag 30 november 2021 22:43 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: PDP-11/70 Boards I built mine from a

Re: PDP-11/70 Boards

On 11/30/2021 6:31 PM, Paul Koning wrote: On Nov 30, 2021, at 7:17 PM, Jay Jaeger via cctalk wrote: ... The issue is (I think) that the ExpressPCB software can only be used to create files to order boards from them - or can it now export ordinary gerbers? (Otherwise, to go with another

IBM 1410 Processor Operating System Compiler Status Report

Over the past few weeks I have been playing with the COBOL, FORTRAN and RPG compilers that are present on the IBM 1410 PR108 Processor Operating system tape, available at: http://piercefuller.com/library/kau1401s.html (it is really 1410) and https://sky-visions.com/ibm/ibm7010_soft.shtml (For

Re: Items Wanted

On 7/20/2021 6:59 AM, Eric Moore wrote: >> 11) ESDI disk emulator > > I am not aware of any such beasties in the wild.  MFM, yes, but I haven't seen ESDI.   I would love for such a thing to exist, thinking of my Apollo, 3B2 and IBM RT/PC workstations. I’d also love

Re: Items Wanted

On 7/20/2021 7:34 PM, Josh Dersch wrote: On Tue, Jul 20, 2021 at 4:06 PM Jay Jaeger via cctalk mailto:cctalk@classiccmp.org>> wrote: On 7/20/2021 6:59 AM, Eric Moore wrote: > > >      >> 11) ESDI disk emulator >      > >      > I

Re: Items Wanted

On 7/11/2021 9:33 AM, Eric Moore via cctalk wrote: Hello, I am looking for any of the following items. I have terminals and assorted qbus and S100 cards for trade, or am happy to discuss payment :). 1) Qbus scsi card You and me both. ;) I have one - and I intend to keep it. 2) Emulex TC01

Re: Sourcing Capacitors for my H7140 PSU

On 7/23/2021 11:48 AM, Rob Jarratt via cctalk wrote: I gave up trying to repair this PSU myself and I have got someone to do it professionally. It seems they have it working well but think that two capacitors should still be replaced. I think these are the two big "Coke Can" sized filter

Re: Source for replacement caps in H744 regulators

On 1/6/2022 7:03 PM, W2HX via cctalk wrote: My 2c. I am not familiar with a "whine" but certainly a "hum." Sometimes if a power supply has seen a lot of heavy load over its lifetime, the heat generated can begin to do things to the transformer. And once that heat has done its "thing" to the

Re: Installing an operating system on the 11/83 - update.

Sent from my iPad > On Feb 22, 2022, at 22:59, Ethan Dicks wrote: > > 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

Re: Installing an operating system on the 11/83 - update.

On 2/22/2022 6:12 PM, js--- via cctalk wrote: On 2/22/2022 7:00 PM, Ray Jewhurst wrote: I read that you can indeed use a standard 1.2 Meg drive and that you can also use DSHD 5.25 disks in place of RX50s. Is there any truth in this? If there is it will be much easier and cheaper to make disks

Re: cctalk Digest, Vol 89, Issue 21

On 2/22/2022 6:29 PM, Paul Koning via cctalk wrote: You could boot a packaged Linux that doesn't need installation but runs directly from the boot device. I haven't done this but I know they are out there and easy to use. I use Clonezilla for standalone Linux stuff (including backups) -

Re: Is The M9312 Boot Module Essential?

My 11/24 does *not* have an M9312. My UNIBUS out from the processor backplane goes to an RK611, and then to a VT11. I have an M9301 at the end, in the VT11 UNIBUS OUT slot. I didn't pull the map card, but I am 99.% sure that my boot ROMs (RL11, RK611) are on my UNIBUS map card. The

Re: Installing an operating system on an 11/83

On 2/21/2022 6:55 PM, Glen Slick via cctalk wrote: On Mon, Feb 21, 2022, 4:32 PM Rod Smallwood via cctalk < cctalk@classiccmp.org> wrote: Hi I have built an 11/83 in a BA23 box. It has a KDJ-11B, 2mB PMI memory, an RQDX3 with an RX50 attached, Plus a CMD CQD 220A Disk controller

Re: Greasweasel was Re: Installing an operating system on the 11/83 - update.

On 2/22/2022 12:29 PM, Ray Jewhurst via cctalk wrote: I was wondering how well a Greaseweasel would write floppies for my Rainbow. Also, I saw that someone had images for Venix-86 Rainbow and I was wondering if they would be interested in sharing them. Thanks Ray Sent from my Verizon,

Re: PDP 11/24 - A Step Backwards

On 4/2/2022 5:49 AM, Noel Chiappa via cctalk wrote: > does [disabling the MCLK counter via DCLO, asserted by the two > E126 monostable chain from ACLO] happen just on power-down, or on > power-up too? I'd need to understand how that two monostable chain > works in both cases,

Re: PDP 11/24 - A Step Backwards

On 4/2/2022 5:12 PM, Rob Jarratt via cctalk wrote: Using tack soldered wires, I have traced back and I *think* I have found something. There could be a fault in E52 (sheet K6, p157 of the PDF). While K6 BUS DCLO L is +5V, I am measuring K6 BUF DCLO H at an average 1.64V with 50us spikes at

Re: Origin of "partition" in storage devices

Sent from my iPad > On Feb 1, 2022, at 10:43, Jon Elson via cctalk wrote: > > On 2/1/22 00:38, Peter Corlett via cctalk wrote: >> On Mon, Jan 31, 2022 at 07:51:28PM -0500, Paul Koning via cctalk wrote: >> [...] >>> Yes, RT-11 is a somewhat unusual file system in that it doesn't just >>>

Re: PDP-11/34 CPU PROMS

Looking at my inventory, I seem to have no less than four spare M8266 (plus one in my 11/34 that runs, plus probably another in my 11/34 out in the garage.) Rod, where are you located? JRJ On 2/9/2022 6:16 PM, Rod Smallwood via cctalk wrote: Hi     We have narrowed the problem down. Its

Re: Source for replacement caps in H744 regulators

On 1/7/2022 2:35 PM, Nigel Johnson Ham via cctalk wrote: I told the chief engineer that the problem was the same thing that caused planes to crash, and he suggested maybe the cargo door had fallen off!  (that puts it in 1972 since it was AA Flight 96 that had just happened!) My uncle

Re: mystery S-100 available

FYI, that "unpopulated board" is not and never was S100, and has clearly had some told contact fingers cut off. Perhaps used as a source for parts at some point. You might want to join and post this to the "s100computers" Google group. JRJ On 1/23/2022 1:42 PM, Stan Sieler via cctalk wrote:

Re: Possibly going up to VCF, stuff I would like to sell/get to proper people pdp8/12/HP stuff

On 4/9/2022 2:42 PM, Chris Zach via cctalk wrote: Hi all! I'm thinking about going up to VCF in Wall next weekend. I haven't been to it since it was the Trenton Computer Fest (think late 1990's) so I'm not sure what the protocol is on tailgating, trading stuff or whatnot. Appears that they

[cctalk] Re: Good C to FPGA/PLA compiler

On 9/22/2023 4:45 PM, ben via cctalk wrote: On 2023-09-22 3:16 p.m., Mike Katz via cctalk wrote: Martin, The debug board will need to have the following functionality: 1. Read and write to/from memory when the CPU is running using one     cycle data break (DEC's version of DMA for the PDP-8).

[cctalk] Re: Shelves / Rails for DEC Racks Questions

On 9/27/2023 3:53 PM, Paul Koning via cctalk wrote: On Sep 27, 2023, at 12:25 PM, Jay Jaeger via cctalk wrote: I have some open slots in some of my racks. I do have some old DEC rails, but I have a fair amount of equipment, from both DEC and other manufacturers, for which those rails

[cctalk] Shelves / Rails for DEC Racks Questions

I have some open slots in some of my racks.  I do have some old DEC rails, but I have a fair amount of equipment, from both DEC and other manufacturers, for which those rails are not suitable. Does anyone have any specific recommendations for shelving? (where equipment could just be slid on

An IBM 1410 puzzlement...

I have a puzzlement with my IBM 1410 FPGA implementation. ALD page 42.10.10.1, ILD figure 89 The symptom is this: The CPU runs and can execute instructions. So, stuff is generally working. Starting the address set process, the console appropriately prints the "B" prompt (to set the

IBM 1410 FPGA Update

Resend (first one seems to have bounced) My FPGA implementation of the IBM 1410 Data Processing System continues to progress. There is now a console (with the console typewriter, keyboard, lights and switches) written in C# up on github. With that addition several things now work: -

[cctalk] Re: Data General Nova and Eclipse Hobbyist License...

Ray, I have quite a lot of material you do not have listed. For a while I had it on my Google Drive (password secured), but not any longer. The attached files should give you an idea. Contact me off list if you want to pursue a transfer. (I suppose the list may well not accept

[cctalk] Re: 14 DZ11's for sale/whatever

For an awful lot of software, holding a line until there is an end of line is not practical. Text editors in particular simply won’t work that way. The UNIX shell wouldn’t work in that environment either. So this character by character interrupt is pretty standard. Sent from my iPhone > On

[cctalk] Re: Minicomputer front panel.

Well, as it turns out I have a full PDP-8/M front panel, including the board, which I *believe* is compatible with an 8/E, but has LED lights instead of incandescent ones (one might have to check to make sure that the pin with the lamp power isn't used on the baord.) [It is a FULL front

[cctalk] Re: Pertec controller; was: anybody need 1/2" tape drives?

On 11/28/2022 12:17 AM, Chuck Guzis via cctalk wrote: If anyone cares, I've been working on a Pertec tape controller design. The initial version worked remarkably well with only a few bodge wires. I'm assembling the respin of the design and do not anticipate any issues. It's basically a 4x6

[cctalk] Re: AI applied to vintage interests

> On Jan 17, 2023, at 04:52, Peter Coghlan via cctalk > > How about translating code from Z80 which has several registers to 6502 with > rather fewer? That would seem to need some more intelligent thinking on > how to simulate the unavailable registers without causing additional >

[cctalk] Re: mainframe vs mini

The 709x had data channels which ran asynchronously, and generated channel traps — i.e. interrupts. I don’t think it had a, say, 60Hz clock, but I/O interrupts would allow a certain basic level of multiprogramming. The IBM 1410 also had I/O interrupts, and even had a rudimentary optional

[cctalk] Re: WTB Any storage for a PDP 8/A

Sounds a bit like SmallC or TinyC from back in the day. Sent from my iPad > On Feb 25, 2023, at 08:46, silvercreekvalley--- via cctalk > wrote: > > Hi all, > > I'm cooking up a new interpreter for the PDP 8. It uses a C like language > (C-) and is really a project to get my head round the

[cctalk] Continental 50 Pin connector vs. AMP 200276 50 pin connector - same?

I have an HP 2875B paper tape drive that I want to interface to. It has a 50 pin block connector (using well under 1/2 the pins). The connector manufacturer was Continental. I have already discovered, the hard way, that it is not a winchester connector - the pins on the 50 pin Winchester

[cctalk] Re: IBM 1410 FPGA Status

PM, Robert Armstrong via cctalk wrote: On Mon, 2023-07-10 at 21:32 -0500, Jay Jaeger via cctalk wrote: Over the past couple of months I have been working on my FPGA implementation of the IBM 1410 ... What are your plans for implementing I/O? Are you going to emulate a card reader and line

[cctalk] Re: IBM 1410 FPGA Status

wrote: On Mon, 2023-07-10 at 21:32 -0500, Jay Jaeger via cctalk wrote: Over the past couple of months I have been working on my FPGA implementation of the IBM 1410 1960's era pre System/360 system again. I am pleased to share that the CPU now passes a significant diagnostic, CU01, which tests

[cctalk] IBM 1410 FPGA Status

Over the past couple of months I have been working on my FPGA implementation of the IBM 1410 1960's era pre System/360 system again. I am pleased to share that the CPU now passes a significant diagnostic, CU01, which tests almost all of the instructions, and also tests I/O with overlap and the

[cctalk] Re: IBM 1410 FPGA Status

Yes, as it was part and parcel of every 1410. but I have not tested it yet. Sent from my iPad > On Jul 11, 2023, at 12:06, Van Snyder via cctalk > wrote: > > On Mon, 2023-07-10 at 21:32 -0500, Jay Jaeger via cctalk wrote: >> Over the past couple of months I have been

[cctalk] Re: Continental 50 Pin connector vs. AMP 200276 50 pin connector - same?

On 5/15/2023 12:36 PM, Brent Hilpert via cctalk wrote: If it's of any help though, on my 2748 connector (the cord-plug-in end) the male pin diameter is 0.061 ~ 0.062" (measured with a cheap micrometer, perhaps the actual spec is 1/16=0.0625). I understand the confusion - I have on hand 3

[cctalk] IBM 1410 FPGA Status - 1401 Mode

My IBM 1410 FPGA project now features a working 1401 mode as well, with the flip of a switch, exactly like the original IBM 1410. There are still a few real problems (e.g., Console I/O Input under program control doesn't seem to be working), a few minor issues involving console problems when

[cctalk] Re: Continental 50 Pin connector vs. AMP 200276 50 pin connector - same?

Will reply in answer myself on this one: Firstly the paper tape reader is an HP 2748B - sorry about that typo (blush). Secondly the AMP connector I acquired was NOT compatible with the Continental connector on the paper tape reader. The pins on the AMP connector, while larger than those on

[cctalk] Re: Paper Tape Reader Needed

I live in Madison, WI, and have a DEC PC05 on a PDP-11 that can also host a Unibone board to make file transfers easy. I also have a recently restored HP 2748B, for which I have a simple Arduino interface with an Ethernet "hat" to read files into a PC. Neither is available for loan, but I'd

[cctalk] Sorbus Micro Handbook 1990 Update

I have been scanning in a lot of manuals that I have that relate to computers that are not in my collectiion, but which may be unique, or nearly so. Today I scanned in the Sorbus Micro Handbook 1990 Update, which has information provided to Sorbus FEs who might service various microcomputers.

[cctalk] Re: EMP was: oscilloscopes

Paul, would you mind if I shared this on the Facebook EndFed Halfwave Antenna group?  Time and time again I see folks talk about putting in ground rods in for antennas and NOT bonding them to the electrical service ground rod.    In most (if not all) locations in the US, this kind of bonding

[cctalk] Re: WTB: PSU for DEC PDP8F

On 1/12/2024 12:02 AM, Raymond Robinson via cctalk wrote: Hi there, I need a power supply for my PDP8F computer. It is missing. The PDP8F 19" chassis box came in 3 different depths, 600 mm (PSU front to back) 370 mm (PSU across the back) 300 mm (PSU front to back) I need the shallow one, the

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