Re: how fast were drum memories?

from "Dave Wade via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Thursday, 10 May, 2018 5:53:38 PM Subject: RE: how fast were drum memories? I don't think early drums were terribly fast, but this wasn't a problem

EF50 was Re: radar history

E = 6.3v filament F = Pentode 5x = B9G base Andy

Re: R: Large discs

"Is there a form of machine readable data older than 150 years?" Jacquard cards; Morse recorder; certain musical instrument programmes. Also with modern scanners virtually any printed material and some handwritten. Andy

Re: Kennedy 9832 tape drive ( eBay 302562153660)

eBay Item 302562153660 Sure, it's a Kennedy 9832 drive mounted in some sort of giant hard case. Anyone know if this was a modified drive? What on earth would it be used for? --Chuck Can't see this item, ut Tape drives in flight cases (which I assume is described) are normally

Re: Plotter + Tape drive

-Topic Posts" <cctalk@classiccmp.org> Sent: Thursday, 17 August, 2017 6:32:17 PM Subject: Re: Plotter + Tape drive Hi Andy, I too would be interested in the tape drive and plotter - I can collect postcode ME1, so not too far away Regards Peter ____ From: ANDY HOL

Re: Plotter + Tape drive

a cctalk" <cctalk@classiccmp.org> To: "ANDY HOLT via cctalk" <cctalk@classiccmp.org> Sent: Wednesday, 16 August, 2017 12:15:36 PM Subject: Re: Plotter + Tape drive Hi, > HP 88780 9-track tape drive (also several tapes "new" in packaging). > Both were wor

Plotter + Tape drive

on another list. Soonest to collect has priority! Andy Holt ps Tony if you want these but cannot transport mail me and we'll see if a solution is possible.

Re: 8mm cinemax type film players (almost OT)

I guess that depends on your opinion of "reasonable". I have a number of 8mm home videos my father made but every place I looked at was prohibitively expensive (several hundred dollars per reel!!) Or on location, perhaps (I'm in the UK) A few years ago I had mine and my fathers 8mm

Re: 8mm cinemax type film players (almost OT)

My tape obsession was already slightly out of control, but when I found a create of 8mm reel of family footage and other movies in my 90 something year old grandfather's storage, I need a recommendation on how to play these, we're they standardised? What is the difference between 8mm and

Re: Anybody has Control Data (CDC) disk packs for 841 and 844 disk drives to spare with?

I am looking for someone who can read an ICL EDS8 disk pack. I am told that it would have been used in an ICT type 2802/2 drive on an ICL 1905E, but that it is also compatible with an IBM 2311 disk drive and that it uses a mechanical assembly based on a CDC 9450. Given the mention of the 2311

Re: Gould 32/77 (was: NWA auctions)

- Original Message - > From: "David Brownlee" > > We had a PN9080 and PN6040 at City University as the main systems in the > late 90's Ah, yes, "The Magic Roundabout" - was three 6040s and one 9080. I still possess the Gould nameplate from the 9000. They were the last

Re: Spam [was Re: still looking for that stuff?]

>> Spam will not stop until the last spammer is dead. > > Actually, it's really simple to stop spam. Simple, not easy. > > You just need to delegate responsibility along with authority when > handing out netblocks, registering domain names, and the like. When there were only tens of thousands

Re: AW: When did Memory- and IO Protection Emerge (Esp. in Minis)?

c Posts" <cctalk@classiccmp.org> Sent: Thursday, 5 May, 2016 3:33:03 AM Subject: Re: AW: When did Memory- and IO Protection Emerge (Esp. in Minis)? On 05/04/2016 05:07 PM, ANDY HOLT wrote: > >> Is the CDC 1700 considered to be in the family of "minicomputers"

Re: AW: When did Memory- and IO Protection Emerge (Esp. in Minis)?

> Is the CDC 1700 considered to be in the family of "minicomputers"? > (i.e. was the word invented before then?). Though functionally it sort of had the minicomputer nature, it was physically a bit large for that term … would have been called a "process control" computer. I also don't think I

Re: youtube video of a runnning XDS Sigma mainframe with lots of nice peripherals

> I remember hacking the computed goto in the Fortran so it would > execute my own entered assembler. That was fun. ;) Interesting - it was a more normal hack to abuse the assigned goto - in most implementations* the variable contents were just a genuine memory address and you could drop

Re: "Demystification" is just as important as "Abstraction" in "Computer Science" (Was: Know any Fortran

From: "Fred Cisin" > They literally refused to understand that a > dataset could exist that would be too large to fit into memory. In the UK, the Home Secretary wants to force all ISPs to store and keep (reasonably) easily searchable logs of all URLs accessed by all their

Re: Structured Fortran - was Re: Self modifying code, lambda calculus

> From: "Chuck Guzis" … > After all, languages are supposed to expose features > of the underlying machine to the programmer. Many believe that the purpose of languages is to HIDE (abstract) the underlying machine.

Re: Self modifying code, lambda calculus - Re: ENIAC programming

I took it from Crispin's paper and I assumed it was correct as he has done a lot of work on this... .. and I assumed when he said "solve all problems" we were referring to problems that can be solved on a Turing Complete computer It is easy to prove that a computer does not need the

Re: internet blocking problem ?

* Jon Elson [150910 21:32]: [..SNIP..] > So, I wonder if I can ask classiccmp members, especially in > the US, to check if they can view this page: > http://members.iinet.net.au/~daveb/simplex/simplex.html > > This is David Brooks' homebuilt 16-bit CPU. > > Please send

Re: Classic programming

And one should not forget Algol. 60 or 68? (and, for that matter, PL/1 should probably be considered an unsung inspiration for C as it was the implementation language for Multics in which Bell labs was a partner and must have inspired at least the name for Unix)

Re: SCSI Tape to TAP utility

Good OS-es allowed an operator to mount tapes for his next few jobs, without paying attention to paper labels and have the OS automatically locate and assign tapes to the proper job. Even the old Operators Exec (and thus George 1 and 2) could do that on the ICL 1900 - I think it was

Re: PDP 11 gear finally moved

From: tony duell a...@p850ug1.demon.co.uk To: General Discussion: On-Topic and Off-Topic Posts cctalk@classiccmp.org Sent: Wednesday, 22 July, 2015 12:39:42 PM Subject: RE: PDP 11 gear finally moved I might think twice about doing a board that was fragile with age, but otherwise, change 'em

Re: what IBM system is this?

- Original Message - From: Chuck Guzis ccl...@sydex.com To: gene...@classiccmp.org, discuss...@classiccmp.org:On-Topic and Off-Topic Posts cctalk@classiccmp.org Sent: Sunday, 5 July, 2015 1:13:31 AM Subject: Re: what IBM system is this? On 07/04/2015 04:37 PM, simon wrote: found in the

Re: XH558 - was Re: using new technology etc

I was born too late to see the SR-71 fly. I could still see a U-2 fly though (those are also neat planes). There's so many cool planes, and so little time to experience them all. (SR-71/A-12, U-2, B-52, CF-105, Avro Lancaster, Supermarine Spitfire, Hawker Hurricane, Messerschmitt Bf 109, Avro

Re: XH558 - was Re: using new technology etc

- Original Message - From: Christian Gauger-Cosgrove captainkirk...@gmail.com Is the Lancaster at Duxford the other flightworthy one? I can't recall. No Bringing this topic full circle, does anyone know if any minicomputers (DEC PDP-8s or 11s, DG Novæ, HP 21XXs, et cetera) were ever