Here is some pretty good information.
https://archive.org/details/TNM_Glass_computer_memories_-_Corning_Electronics_20171206_0185
Mark
-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brent Hilpert
via cctalk
Sent: Thursday, March 31, 2022 11:53 PM
To:
On 2022-Mar-31, at 8:05 PM, Anders Nelson via cctech wrote:
> Hey all, found this on eBay:
>
> https://www.ebay.com/itm/Corning-Glass-memory-/125087612899
>
> I can't find any info on it - was it some kind of delay-line or magnetic
> laminate stack?
>
> Interesting!
Very interesting - there w
Hey all, found this on eBay:
https://www.ebay.com/itm/Corning-Glass-memory-/125087612899
I can't find any info on it - was it some kind of delay-line or magnetic
laminate stack?
Interesting!
On Fri, Apr 1, 2022 at 12:13 AM Noel Chiappa via cctalk
wrote:
> > I really wish when people are asking for assistance or talking about a
> > schematic or circuit they would include a link/reference to exactly
> > what they are looking at
>
> But everone probably _was_ looking at the
> From: Brent Hilpert
> DCLO & ACLO behave as power-on-reset signals to the system.
Minor nit: actually, I think it's DCLO which performs that function in a lot
of places; see e.g. the latches on pg. K2 (pg. 153 of the PDF) and K7. (INIT,
usually in buffered form, is used more widely for
On 2022-Mar-31, at 4:12 PM, Noel Chiappa wrote:
>> From: Brent Hilpert
>
>> So apparently I've been looking at the wrong +5V supply (H777) because
>> the rest of you are indeed looking at a different +5 supply (H7140),
>> both of which are in that same 11/24 pdf document
>
> That's because the H7
> From: Brent Hilpert
> So apparently I've been looking at the wrong +5V supply (H777) because
> the rest of you are indeed looking at a different +5 supply (H7140),
> both of which are in that same 11/24 pdf document
That's because the H777 is the P/S for the BA11-L 5-1/4" box, a
On 2022-Mar-31, at 2:14 PM, Rob Jarratt wrote:
>> Those three comparators in the H777 are looking at a time-delay ramp
>
> Is that a typo? This is the H7140 not the H777.
Groan.
When this thread came up I went looking for the 11/24 schematic. I found the
document I linked earlier for the 11/24
On 3/29/22 10:51, Brielle via cctalk wrote:
Yes, saw an article that said he was fine. Not sure if there’s been any
updates since that article though given how things have escalated…
I exchanged email with Dmitry Cherepanov this morning. He is
understandably heartbroken, but he and his fa
I made some interesting discoveries this evening. See below.
> -Original Message-
> From: cctalk On Behalf Of Brent Hilpert
via
> cctalk
> Sent: 31 March 2022 21:03
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: PDP 11/24 - A Step Backwards
>
> On 2022-Mar-31, a
On 2022-Mar-31, at 12:36 AM, Noel Chiappa via cctalk wrote:
>> From: Tony Duell
>
>> A short in FET Q15 on the bias/interface board in the PSU could do it.
>> The gate of that FET is driven from an LM339 comparator the -ve supply
>> of which is -15V.
>
> Ah; I hadn't even looked at the P/S prints
> From: Tony Duell
> A short in FET Q15 on the bias/interface board in the PSU could do it.
> The gate of that FET is driven from an LM339 comparator the -ve supply
> of which is -15V.
Ah; I hadn't even looked at the P/S prints.
(Like I said, I'm really weak on analog: for digita
12 matches
Mail list logo
