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

On Thu, Mar 16, 2023 at 09:25:31PM -0400, Ken Seefried wrote: > On Thu, Mar 16, 2023 at 12:32 PM Alexander Huemer via cctalk < > cctalk@classiccmp.org> wrote: > > > On Thu, Mar 16, 2023 at 11:05:41PM +0800, Tom Hunter via cctalk wrote: > > > FSF does not enforce anything. > > > > https://gpl-viola

[cctalk] Re: mainframe vs mini

On 2023-03-16 8:38 p.m., Ethan Dicks via cctalk wrote: 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 m

[cctalk] Re: PSU of a 11/23SD??

The PSU (and the PDP11/73 in a BA11) is working again. After thorough cleaning of the PSU PCB (had to dismount the heatsink and the 3 TO3's, loosen the TO220's) I'vew checked the semiconductors..ok so far. Fuse F2 was blown. Interestingly the electrolyte of that original Mallory cap seems to ha

[cctalk] domesticating the computer - call for last inputs

Ok, I think we have a good narrated composition! It is still Unlisted since there are a few more things to finalize/decide. But unless we spot any major flaw in the rendering, this should be wrapped up over the next day or so. There are a few somewhat subtle easter eggs added. https://www.you

[cctalk] VMS V4.2 MUP (Mandatory Update) wanted!

The mandatory update for VMS V4.2 is still missing in my collection. Because of that, VMS V4.2 is not fully usable, neither can layered software be installed nor can it be upgraded to VMS V4.3. Who can help???

[cctalk] Re: VMS V4.2 MUP (Mandatory Update) wanted!

I probably have microvms 4.2 mup On Friday, March 17, 2023, Hans-Ulrich Hölscher via cctalk < cctalk@classiccmp.org> wrote: > The mandatory update for VMS V4.2 is still missing in my collection. > > Because of that, VMS V4.2 is not fully usable, > neither can layered software be installed nor can

[cctalk] Re: VMS V4.2 MUP (Mandatory Update) wanted!

Hi, that's great news! Could you please verify? Is it on diskette (probably RX50), tape (TK50) or an image for simh? Can I help you with other VMS software? Thanks a lot! Ulli Am Fr., 17. März 2023 um 14:21 Uhr schrieb Plamen Mihaylov via cctalk < cctalk@classiccmp.org>: > I probably have micro

[cctalk] Re: mainframe vs mini

> On Mar 16, 2023, at 10:14 PM, Chuck Guzis via cctalk > wrote: > > On 3/15/23 17:23, Jon Elson via cctalk wrote: > >> Yes, the IBM 709x ran in single-job fashion. I don't think it had >> interrupts, so breaking off one program to schedule another was not >> possible. Also, it had no memor

[cctalk] Re: VMS V4.2 MUP (Mandatory Update) wanted!

I wouldn't mind having a copy for completeness too... > -Original Message- > From: Hans-Ulrich Hölscher via cctalk > Sent: 17 March 2023 13:25 > To: General Discussion: On-Topic and Off-Topic Posts > Cc: Plamen Mihaylov ; Hans-Ulrich > Hölscher > Subject: [cctalk] Re: VMS V4.2 MUP (Mand

[cctalk] Re: VMS V4.2 MUP (Mandatory Update) wanted!

On Fri, Mar 17, 2023, 6:11 AM Hans-Ulrich Hölscher via cctalk < cctalk@classiccmp.org> wrote: > The mandatory update for VMS V4.2 is still missing in my collection. > > Because of that, VMS V4.2 is not fully usable, > neither can layered software be installed nor can > it be upgraded to VMS V4.3.

[cctalk] Re: mainframe vs mini

On 3/17/23 06:25, Paul Koning wrote: > > I'm still trying to get a good answer to "when did the first commercial (as > opposed to one-off lab) computer appear that had interrupts as a standard > feature?" > > It looks like there was the IBM 704, in 1958, with interrupts but some > documentati

[cctalk] Re: mainframe vs mini

Anent the Smotherman paper. Woefully incomplete and inaccurate, but perhaps a starting point. https://people.computing.clemson.edu/~mark/interrupts.html For example, he cites the CDC CYBER 200 as 1981. Nope--CYBER was mostly a relabeling effort. For example, the 6600 became CYBER 74, the 76

[cctalk] IBM RT PC Manuals free for shipping

Any interest here before I post them to EPay? Available for shipping cost from 95549: IBM RT PC AIX OS Communications Guide 59X7668 IBM RT PC AIX OS Messages Reference 59X9115 IBM RT PC INED 59X7643 These are the classic early slipcase style manuals.  They are in pristine condition.   All t

[cctalk] Re: mainframe vs mini

> On Mar 17, 2023, at 11:22 AM, Chuck Guzis wrote: > > Anent the Smotherman paper. Woefully incomplete and inaccurate, but > perhaps a starting point. > > https://people.computing.clemson.edu/~mark/interrupts.html I noticed the section on deferred interrupts, which mentions Cutler and "fork

[cctalk] Re: mainframe vs mini

On Thu, Mar 16, 2023 at 9:38 PM Ethan Dicks via cctalk wrote: > > We had an Amdahl in the middle of a multi-thousand-square-foot > computer room (one of several) at work 25 years ago. Heh, of the limited number of big Mainframe data centers I got to visit, every one had one big red Amdahl box amo

[cctalk] Re: mainframe vs mini

Paul Koning wrote: > I noticed the section on deferred interrupts, which mentions Cutler > and "fork" on RSX. It doesn't mention the similar mechanism, also > called fork, in RT-11. And, pray tell, what do these "fork" mean? I'm curious since Unix has fork as a verb, whereas Tenex has it as a no

[cctalk] Re: mainframe vs mini

> On Mar 17, 2023, at 12:24 PM, Lars Brinkhoff wrote: > > Paul Koning wrote: >> I noticed the section on deferred interrupts, which mentions Cutler >> and "fork" on RSX. It doesn't mention the similar mechanism, also >> called fork, in RT-11. > > And, pray tell, what do these "fork" mean? >

[cctalk] Re: mainframe vs mini

> On Mar 17, 2023, at 11:22 AM, Chuck Guzis wrote: > > Anent the Smotherman paper. Woefully incomplete and inaccurate, but > perhaps a starting point. > > https://people.computing.clemson.edu/~mark/interrupts.html On interrupt coalescing (mentioned under "performance techniques"), an early

[cctalk] Re: VMS V4.2 MUP (Mandatory Update) wanted!

On Fri, Mar 17, 2023 at 3:50 PM Rob Jarratt wrote: > I wouldn't mind having a copy for completeness too... > > > -Original Message- > > From: Hans-Ulrich Hölscher via cctalk > > Sent: 17 March 2023 13:25 > > To: General Discussion: On-Topic and Off-Topic Posts < > cctalk@classiccmp.org>

[cctalk] Re: mainframe vs mini

On 17/03/2023 16:34, Paul Koning via cctalk wrote: This goes by way of what RT11 originally called a "fork queue" but was told to rename to "fork list" :-) The story was that Dave Cutler had a T-shirt made with "fork queue" on it, but I don't know if that's actually true. Antonio -- Anto

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

FSF hasn't done anything in at least a decade, but someone from there "is still around", so they're somehow relevant. People who actually are doing something (e.g litigating) are dismissed because you "don't know these people" (aside: there's someone who cares about open source who doesn't know wh

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

I once heard a story from someone* who was told by a journalist that while said journalist was interviewing Richard Stallman he was [WARNING: GRAPHIC CONTENT COMMENCES HERE] picking the jam from between his toes and eating it. Make of that what you will, but if that isn't just a slander, that's th

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

> I once heard... You don't need hearsay. FSF leadership seems to be proud, and vocal, of things that make the rest of us cringe. On Fri, Mar 17, 2023 at 7:48 PM Sellam Abraham via cctalk < cctalk@classiccmp.org> wrote: > I once heard a story from someone* who was told by a journalist that whil

[cctalk] Re: domesticating the computer - call for last inputs

Ok, the final is up! If anyone wants the background image, the link is in the description. Thank you all for helping to make this far better than what my daughter and I started with. Domesticating the Computer: how the appliance computer came to be - YouTube

[cctalk] Found more CAMAC stuff

Sorry, I've lost track of the guy who was interested in collecting CAMAC bits.  Cleaning up our lab, I found a Kinetic Systems 3922 Z1A crate controller, and a 2926 Z1A ISA slot controller for it.  Anybody interested? Thanks, Jon