core memory
in [Design]
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From: TTman on 7 Dec 2009 09:11 "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:kqalh59i8jsogn1t6p3ghuaop5c137qtoj(a)4ax.com... > Testing some FTP stuff, threw up some test files... > > ftp://jjlarkin.lmi.net/Core_304bits.jpg > > ftp://jjlarkin.lmi.net/Core_4K.jpg > > ftp://jjlarkin.lmi.net/Core_4Kdetail.jpg > > John > > I remember using those back in the early 70s. Made in Ireland.... 16K and 32K, but I forget the width. It was for a PDP 'clone' that was designed by some Ex Uni boffins from Sussex. Controller board was a nightmare ( as I remember), full of 121 and 123 monostables :( Was used as a CNC controller ( one of the first) on Herbert Machine Tools in Coventry. The machine had a 64x24 bit diode microprogram matrix ( replaced by otproms)and could do x+y+z in one instruction (software, that is), in a few microsteps...ALU had about 100+ logic chips.... Ahh the good old days.
From: John Larkin on 7 Dec 2009 09:58 On Mon, 7 Dec 2009 14:11:00 -0000, "TTman" <someone.pc(a)ntlworld.com> wrote: > >"John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message >news:kqalh59i8jsogn1t6p3ghuaop5c137qtoj(a)4ax.com... >> Testing some FTP stuff, threw up some test files... >> >> ftp://jjlarkin.lmi.net/Core_304bits.jpg >> >> ftp://jjlarkin.lmi.net/Core_4K.jpg >> >> ftp://jjlarkin.lmi.net/Core_4Kdetail.jpg >> >> John >> >> >I remember using those back in the early 70s. Made in Ireland.... 16K and >32K, but I forget the width. It was for a PDP 'clone' that was designed by >some Ex Uni boffins from Sussex. Controller board was a nightmare ( as I >remember), full of 121 and 123 monostables :( The first 11, the PDP-11/20, was an asynchronous hairball, like the PDP-8s. It was full of RCs, delay lines, and bizarre logic paths, and was all MSI TTL, over 500 packages on two boards, no microcode. There was a short assembly program that used the paper tape reader to cause a metastability that totally locked up the CPU. Early 70s was about when people started getting religion about synchronous logic design. >Was used as a CNC controller ( one of the first) on Herbert Machine Tools >in Coventry. >The machine had a 64x24 bit diode microprogram matrix ( replaced by >otproms)and could do x+y+z in one instruction (software, that is), in a few >microsteps...ALU had about 100+ logic chips.... >Ahh the good old days. > Actually, I don't miss them all that much. John
From: John Larkin on 7 Dec 2009 11:19 On Mon, 07 Dec 2009 14:07:15 +1100, Sylvia Else <sylvia(a)not.at.this.address> wrote: >John Larkin wrote: >> Testing some FTP stuff, threw up some test files... >> >> ftp://jjlarkin.lmi.net/Core_304bits.jpg >> >> ftp://jjlarkin.lmi.net/Core_4K.jpg >> >> ftp://jjlarkin.lmi.net/Core_4Kdetail.jpg >> >> John >> >> > >Many a poor woman's eyesight in the third world ruined making those, >I'll be bound. > >Sylvia. Do you think that doing close work ruins vision? What about sewing? Or reading? John
From: Dirk Bruere at NeoPax on 7 Dec 2009 11:31 John Larkin wrote: > Testing some FTP stuff, threw up some test files... > > ftp://jjlarkin.lmi.net/Core_304bits.jpg > > ftp://jjlarkin.lmi.net/Core_4K.jpg > > ftp://jjlarkin.lmi.net/Core_4Kdetail.jpg I recall seeing the last one (or two) as examples. Semis had just taken over. I assume somebody who later owned a guide dog got to thread them... -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.theconsensus.org/ - A UK political party http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: John Larkin on 7 Dec 2009 11:35
On Mon, 7 Dec 2009 14:11:00 -0000, "TTman" <someone.pc(a)ntlworld.com> wrote: TTman... as in Audi? John |