Re: Source for DEC TC01 (and similar) bulbs?

On Mon, Dec 6, 2021 at 7:39 AM Michael Thompson < michael.99.thomp...@gmail.com> wrote: > > > On Sun, Dec 5, 2021 at 11:46 PM Josh Dersch wrote: > >> I swapped boards around in the datapath for these bits on the TC01 side >> last night and the problem doesn't move. On a whim I put my thumb on

Re: RK11-C indicator panel inlays?

> On 12/6/21 5:50 PM, Mike Katz via cctalk wrote: > For other boards without gold fingers where would you recommend and how > expensive for omnibus size boards? > On 12/06/2021 6:33 PM Jon Elson via cctalk wrote: > I've been using PCBway in China. Usually, the DHL shipping is more expensive >

FTGH: PDP-11 Software Source Book, 3rd Ed

Hi, 2 volumes, Applications and System. See: https://imgur.com/a/ISXGK5N FTGH for postage from Toronto, Canada --Toby

Re: RK11-C indicator panel inlays?

> On 12/06/2021 6:33 PM Jon Elson via cctalk wrote: > > > On 12/6/21 5:50 PM, Mike Katz via cctalk wrote: > > For other boards without gold fingers where would you > > recommend and how expensive for omnibus size boards? > I've been using PCBway in China. Usually, the DHL shipping > is more

Re: RK11-C indicator panel inlays?

I am currently using kicad for the stuff from other PDP-8/omnibus creators but I intensely dislike the user interface paradigm on kicad. We use Altium at work and I have been thinking about using that. On 12/6/2021 6:44 PM, David Bridgham via cctalk wrote: On 12/6/21 17:45, Mike Katz wrote:

Hand tool to remove a difficult (stuck) circuit board

I remember seeing this somewhere. I have done a fair amount of googling with no luck. I'm looking for a hand tool with a plyer like grip at the top of a shaft. At the bottom of the shaft there is a "foot" that, when you squeeze the grip, scissors open. The idea being that you slide the foot

Re: RK11-C indicator panel inlays?

On 12/6/21 17:45, Mike Katz wrote: If I may8 ask a question.  I have never had boards made before. How do I find a good board house that is reasonable and how do I specify the board especially for the PDP-8 Omnibus which should have gold fingers on the edge connectors? I was planning to

Re: RK11-C indicator panel inlays?

Thank you. On 12/6/2021 6:33 PM, Jon Elson via cctalk wrote: On 12/6/21 5:50 PM, Mike Katz via cctalk wrote: For other boards without gold fingers where would you recommend and how expensive for omnibus size boards? I've been using PCBway in China.  Usually, the DHL shipping is more

Re: RK11-C indicator panel inlays?

On 12/6/21 5:50 PM, Mike Katz via cctalk wrote: For other boards without gold fingers where would you recommend and how expensive for omnibus size boards? I've been using PCBway in China.  Usually, the DHL shipping is more expensive than the boards themselves. Larger boards will be less than

Re: RK11-C indicator panel inlays?

I haven't priced anything out yet.  My current project will have reasonably large sized board but will be using DIN 41612 style connectors (so I don't need edge fingers).  I haven't gone to different board vendors yet to see what pricing will be yet (still settling on board size and number of

Re: RK11-C indicator panel inlays?

For other boards without gold fingers where would you recommend and how expensive for omnibus size boards? On 12/6/2021 5:07 PM, Guy Sotomayor via cctalk wrote: On 12/6/21 2:45 PM, Mike Katz via cctalk wrote: If I may8 ask a question.  I have never had boards made before. How do I find a

Re: RK11-C indicator panel inlays?

On 12/6/21 2:45 PM, Mike Katz via cctalk wrote: If I may8 ask a question.  I have never had boards made before. How do I find a good board house that is reasonable and how do I specify the board especially for the PDP-8 Omnibus which should have gold fingers on the edge connectors?

Re: RK11-C indicator panel inlays?

Ethan, I completely agree with reducing the strip size. One of my projects is a redesign of Oscar Vermilion's PiDP-8/I using addressable LEDs.  I was thinking of breaking the 88 LEDs into separate strands based on function (step counter & Multiplier Quotient [17 LEDs], accumulator and link

Re: PDP - 11 was RK11-C indicator panel inlays? -

i'm interested in the RK05 Replica also. On 12/6/2021 2:27 PM, ben via cctalk wrote: On 2021-12-06 8:13 a.m., Henk Gooijen via cctalk wrote: Van: David Bridgham via cctalk Verzonden: maandag 6 december 2021 15:52 Aan: General Discussion: On-Topic and Off-Topic

Re: RK11-C indicator panel inlays?

One of my zillions of projects is to redesign Oscar Vermilion's PdDP-8/I using the Raspberry Pi Pico board and these LEDs. I would use one core for SIMH (the PDP-8 simulator) and one core for the Incandescent Emulation. Right now I'm too busy finding parts for my real PDP-8/E and getting it

Re: RK11-C indicator panel inlays?

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

Re: RK11-C indicator panel inlays?

> On Dec 6, 2021, at 4:05 PM, Ethan Dicks via cctalk > wrote: > > On Mon, Dec 6, 2021 at 10:36 AM Mike Katz via cctalk > wrote: > > Sounds like a great approach. I have a couple of Picos but haven't > dug into the PIO engines yet. Raspberry Pico PIO engines are seriously cool. I used

Re: RK11-C indicator panel inlays?

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. > >

Re: PDP - 11 was RK11-C indicator panel inlays? -

On 2021-12-06 8:13 a.m., Henk Gooijen via cctalk wrote: Van: David Bridgham via cctalk Verzonden: maandag 6 december 2021 15:52 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: RK11-C indicator panel inlays? On

Re: External SCSI Drives on DEC2000 AXP

Yes, terminator installed as it was when the box was on a PC, with the LED lit. Thanks Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.john...@ieee.org On 2021-12-06 1:39 p.m., Craig Ruff via cctech

Re: RK11-C indicator panel inlays?

On 12/6/21 10:36 AM, Mike Katz via cctalk wrote: > Each LED requires 24 bits of data.  That would be 3,456 bits.  The > WS2812B has a 300uS low start indication and 1.25 uS per bit.  That > would mean it would take. 4.62mS to update the all of the LEDs. If I'd known about those when I designed

Re: Need picture of power supply mounted in 11/40 cabinet

Power Supplies, due to their Weight, are placed at the bottom of Racks (prevent tip overs / weight distribution). https://avitech.com.au/?page_id=366 The PDP-11/70 Maintenance and Installation Manual (EK-11070-MM-002) explains that the basic PDP-11/70 system components are located in a double

Re: External SCSI Drives on DEC2000 AXP

Have you verified that the SCSI bus is terminated properly? A missing or improperly configured terminator can sometimes cause those sort of symptoms.

Re: RK11-C indicator panel inlays?

On 12/6/21 10:13 AM, Henk Gooijen via cctalk wrote: > If this RK11-C “blinkenlight” panel would also become available in a 60% > scaled format, > I would buy it immediately. It would be an “übercool” addition to the > PiDP-11/70 and > my 60% scaled (“working”) RK05 drive. I only modified the

Reproduction DEC 144-lamp indicator panels (was Re: RK11-C indicator panel inlays?)

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

Re: Source for DEC TC01 (and similar) bulbs?

On Sun, Dec 5, 2021 at 11:46 PM Josh Dersch wrote: > I swapped boards around in the datapath for these bits on the TC01 side > last night and the problem doesn't move. On a whim I put my thumb on the > tape as it passes over the head and it seems to affect the glitchiness of > the data, at

Re: RK11-C indicator panel inlays?

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. Each LED requires 24 bits of data.  That would be 3,456 bits.  The

RE: RK11-C indicator panel inlays?

Van: David Bridgham via cctalk Verzonden: maandag 6 december 2021 15:52 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: RK11-C indicator panel inlays? On 12/5/21 4:43 PM, Henk Gooijen via cctalk wrote: > I am

Re: RK11-C indicator panel inlays?

On 12/5/21 4:43 PM, Henk Gooijen via cctalk wrote: > I am definitely interested. Never saw the RK-11C (except once on eBay some 15 > years ago)! > However, I have *two* DX11 front panels with the 144 lamps & 4 ”paddle” > connections boards. > I developed a 100x160 mm (Euro-card size) PCB with a

Re: RK11-C indicator panel inlays?

On 12/5/21 3:24 PM, Ethan Dicks via cctalk wrote: > This would be really cool as a debugging tool > more than just as amazing lights. A great lead-in to my story.  I was working away on the RK11 implementation in the QSIC and when I felt like taking a break but still wanted to get something

Re: Women of computing

On Sun, 2021-12-05 at 12:00 -0600, Brie wrote: > > He may as well have just come out and said, ?It triggers me and I > don?t like having to acknowledge that women exist in the field of > computer history.? > > ? Brie Sorry to go off topic, but I have friends and family who are veterans or