[cctalk] Re: looking for HP 1640B GPIB info

Great, thank you so much! There's a lot of very useful information there - including some commands that I can use to test the interface, so I'm very very happy. It also sort-of confirms that the ID? command isn't there, so more confidence that my unit is working correctly. No complete list of

[cctalk] Re: looking for HP 1640B GPIB info

ing like that. I suspect that the GPIB functionality will be about managing what is in the programmable buffers that it can send out in response to some input on the serial link it is monitoring. But how :-) > On 7 Nov 2024, at 22:32, Holm Tiffe via cctalk wrote: > > Sytse van Slooten v

[cctalk] Re: looking for HP 1640B GPIB info

at 22:30, Wayne S wrote: > > There are some available on ebay. Just search “hp 2640b” > > Sent from my Dec Alphastation 200. > >> On Nov 7, 2024, at 11:41, Sytse van Slooten via cctalk >> wrote: >> >> Hi all, >> >> I have a HP 1640B tha

[cctalk] looking for HP 1640B GPIB info

Hi all, I have a HP 1640B that I'm trying to get to work. However I can't find any information about it, and while the machine itself it straightforward enough (and I remember enough from when I was using it in my first dayjob) I can not find anything about how to use the GPIB interface that it

[cctalk] Re: BASIC

And since nobody else seems to, allow me to recall: - MINC BASIC, with all its extensions for I/O and real time events. - MUBAS, the multi-user basic for RT-11. And playing around with BASIC is just so much easier and more fun than anything else you can do with old hardware or emulations thereo

[cctalk] Re: Knockoffs, was: Low cost logic analyzer

On 14 Mar 2023, at 23:23, Chuck Guzis via cctalk wrote: > > On 3/14/23 14:48, Alexander Huemer via cctalk wrote: > >> Let's face it, there is a sizable number of people who will never ever >> buy a logic analyzer for north of $1000. Either because they can't >> afford it or are too greedy. Tha

[cctalk] Re: Low cost logic analyzer

I also use the pctestinstruments. One of its strong points is that it plays well with virtualbox - I run it in a W7 guest on my centos desktop. The buffer depth is usually a bit limiting though, and triggering is also somewhat basic. Another option that I haven't seen mentioned: use the built-in

[cctalk] Re: mainframe vs mini

> > On Fri, 10 Mar 2023, Kevin Anderson via cctalk wrote: >> I always thought of the distinctions this way (from my basis of exposure >> from late 1970s through the 1980s) and from a higher educational setting >> primarily: >> Mainframe = repairs required multiple technicians, some possibly ther

[cctalk] Re: mainframe vs mini

> The first mainframe I worked on was single user, single tasking and all jobs > were > > submitted as "batch" as in a batch of cards. :-) > > Second Mainframe I worked on supported lots of users but to the user it was > > still small amount of interactive and the rest batch. multi-user was d

Re: SETI@home (ca. 2000) servers heading to salvage.

Ah setiathome. Those systems in the photo will have handled a lot of my personal data - well, compared to random other earthlings. I don't really have fond memories of that series of Sun Enterprise though - what are they, 3000 or 3500? Many a times that I stubbed my toes on that v-shaped thing

Re: ID these DEC floppy disks

http://www.bitsavers.org/pdf/dec/pdp11/xxdp/Turnbull_XXDP_Feb93.pdf This doc gives an overview of the naming. The leading C means PDP-11, but is not used in the file names on the xxdp packs and floppies - you'll see it in the

Re: PDP-11/34 CPU PROMS

>>> On Tue, Feb 8, 2022 at 7:04 PM Warner Losh wrote: > >>> I found >>> https://deramp.com/downloads/mfe_archive/011-Digital%20Equipment%20Corporation/08%20PDP-11/01%20PDP-1104-1134/05%20PDP-1104-1134%20Microcode/ >>> which has the source code... >>> >>> But I couldn't find the tools to use thes

Re: Question about DECtape formulation

The other thing on my mind is, high end audio tape from the same period had a coating to reduce static electricity. But that would be on the rear side. > On 24 Jan 2022, at 20:09, Chris Zach via cctalk wrote: > > It sounds more like some sort of sprayed-on coating of some sort of > abrasion-re

Re: PDP-11 Diagnostic Program Listings Micro Fiche Scans

Hello Joerg, Since you first published these, the listings have been of great use to me in improving pdp2011. Before, there were many tests that would just crash, and it would take ages to figure out why from the binary view in my logic analyzer and in some cases I just couldn't figure out what

Re: IEEE-488 on the PDP-11

Hi, Did you think of running MINC basic? That would almost certainly work, even if you don't have any other MINC cards in your machine. Most elegant of course if you'd run the complete floppy image (to be found on Bitsavers), but I'd bet it will also just work if you extract the q4szmx.sav fro

Re: (V)HDL Toolsets

If you’re targeting FPGA hardware (opposed to a design for a foundry, or a design you want to run exclusively in a simulator), it is kind of inevitable that you work with the toolchains that the hardware vendor supplies. Would be nice if you could choose freely from competing toolchains, but the

Re: Odd book

Thanks for the recoomendation Noel, I’ve ordered a copy. Looking forward to when it arrives! Cheers Sytse > On 6 May 2020, at 17:29, Noel Chiappa via cctalk > wrote: > > So, I've come across an odd book that might interest some here: "Achieving > Accuray: A Legacy of Computers and Missiles"

Re: VCF Southeast Photos, Now Thinking Machines

Thanks! Had a good bit of fun reading that. I’m not going to try building an FPGA version though. Not yet. > On 3 May 2019, at 22:26, Jan Adelsbach via cctalk > wrote: > > On 5/3/19 8:02 PM, Sytse van Slooten via cctalk wrote: >>>> It's a CM-2. The problem with m

Re: VCF Southeast Photos, Now Thinking Machines

>> It's a CM-2. The problem with most CM-2s - aside not working in 2019 - is >> most were never fully populated with card cages in all 8 hyper-cubes. That >> particular machine only has card cages in 2 of the hyper-cubes. The other 6 >> are empty. I'm not sure a machine with max 64K processo

Re: RT-11 V4 MU-BASIC help

I've used that image quite a bit for testing my vhdl pdp11. So it should work. >From a quick test, it appears as if the lpt device in the default simh config conflicts. If I disable that, mubas works fine for me. Like so: sim> set cpu 11/45 sim> set lpt disable sim> att rk0 rt11v4-mubasicv2.rk

break on pdp11 serial ports

Hello all, I've been playing around with some ideas for designing some hardware to connect peripherals to an fpga for my vhdl pdp-11. One of the things that should definitely be on there, next to sd cards and leds... are some serial ports for console terminals etc. I've spent some time to creat

Re: RT-11 V4 MU-BASIC help

I've used that image quite a bit for testing my vhdl pdp11. So it should work. >From a quick test, it appears as if the lpt device in the default simh config conflicts. If I disable that, mubas works fine for me. Like so: sim> set cpu 11/45 sim> set lpt disable sim> att rk0 rt11v4-mubasicv2.rk