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  3. OTD 1975, Digital announces the #PDP-11/70

OTD 1975, Digital announces the #PDP-11/70

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  • stevenray@sfba.socialS stevenray@sfba.social

    @chris @aka_pugs ha, that's incredible! Thanks for this.

    chris@mastodon.mihalis.netC This user is from outside of this forum
    chris@mastodon.mihalis.netC This user is from outside of this forum
    chris@mastodon.mihalis.net
    wrote sidst redigeret af
    #13

    @stevenray @aka_pugs I never spotted until today that one of the photos on this website shows Ken Thompson (the father of Unix) with a pidp-11 he assembled. That makes it as legit as could be for running Unix

    stevenray@sfba.socialS 1 Reply Last reply
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    • chris@mastodon.mihalis.netC chris@mastodon.mihalis.net

      @stevenray @aka_pugs I never spotted until today that one of the photos on this website shows Ken Thompson (the father of Unix) with a pidp-11 he assembled. That makes it as legit as could be for running Unix

      stevenray@sfba.socialS This user is from outside of this forum
      stevenray@sfba.socialS This user is from outside of this forum
      stevenray@sfba.social
      wrote sidst redigeret af
      #14

      @chris @aka_pugs yup, saw that and I thought so, too!

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      • paul_ipv6@infosec.exchangeP paul_ipv6@infosec.exchange

        @aka_pugs

        i was trying to remember the boot sequence for a PDP 11/70 from disk.

        i think that the 21 addr switches were an octal 17773052 but can't remember what we did with the 7 switches on the right. it was four movements, ending with "start"?

        anyone remember better than me?

        peterhoneyman@a2mi.socialP This user is from outside of this forum
        peterhoneyman@a2mi.socialP This user is from outside of this forum
        peterhoneyman@a2mi.social
        wrote sidst redigeret af
        #15

        @paul_ipv6 @aka_pugs

        773110 is burned into my brain

        paul_ipv6@infosec.exchangeP 1 Reply Last reply
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        • aka_pugs@mastodon.socialA aka_pugs@mastodon.social

          OTD 1975, Digital announces the #PDP-11/70.
          With up to 4 Megabytes(!) of memory.

          Princeton's PDP-11/45 had 80K bytes of memory. Ran UNIX just fine.

          peterhoneyman@a2mi.socialP This user is from outside of this forum
          peterhoneyman@a2mi.socialP This user is from outside of this forum
          peterhoneyman@a2mi.social
          wrote sidst redigeret af
          #16

          @aka_pugs hmm, my recollection is 128k

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          • peterhoneyman@a2mi.socialP peterhoneyman@a2mi.social

            @paul_ipv6 @aka_pugs

            773110 is burned into my brain

            paul_ipv6@infosec.exchangeP This user is from outside of this forum
            paul_ipv6@infosec.exchangeP This user is from outside of this forum
            paul_ipv6@infosec.exchange
            wrote sidst redigeret af
            #17

            @peterhoneyman @aka_pugs

            boot from tape or different type of disk?

            peterhoneyman@a2mi.socialP 1 Reply Last reply
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            • paul_ipv6@infosec.exchangeP paul_ipv6@infosec.exchange

              @peterhoneyman @aka_pugs

              boot from tape or different type of disk?

              peterhoneyman@a2mi.socialP This user is from outside of this forum
              peterhoneyman@a2mi.socialP This user is from outside of this forum
              peterhoneyman@a2mi.social
              wrote sidst redigeret af
              #18

              @paul_ipv6 @aka_pugs

              I forget. I think we had an RM-80 (maybe?) and two RK-05 removables

              aka_pugs@mastodon.socialA 1 Reply Last reply
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              • peterhoneyman@a2mi.socialP peterhoneyman@a2mi.social

                @paul_ipv6 @aka_pugs

                I forget. I think we had an RM-80 (maybe?) and two RK-05 removables

                aka_pugs@mastodon.socialA This user is from outside of this forum
                aka_pugs@mastodon.socialA This user is from outside of this forum
                aka_pugs@mastodon.social
                wrote sidst redigeret af
                #19

                @peterhoneyman @paul_ipv6 RM-80 was after my time.

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                • aka_pugs@mastodon.socialA aka_pugs@mastodon.social

                  OTD 1975, Digital announces the #PDP-11/70.
                  With up to 4 Megabytes(!) of memory.

                  Princeton's PDP-11/45 had 80K bytes of memory. Ran UNIX just fine.

                  flux@wandering.shopF This user is from outside of this forum
                  flux@wandering.shopF This user is from outside of this forum
                  flux@wandering.shop
                  wrote sidst redigeret af
                  #20

                  @aka_pugs yeah, but not 4MB per process 😉

                  1 Reply Last reply
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                  • aka_pugs@mastodon.socialA aka_pugs@mastodon.social

                    OTD 1975, Digital announces the #PDP-11/70.
                    With up to 4 Megabytes(!) of memory.

                    Princeton's PDP-11/45 had 80K bytes of memory. Ran UNIX just fine.

                    larsbrinkhoff@mastodon.sdf.orgL This user is from outside of this forum
                    larsbrinkhoff@mastodon.sdf.orgL This user is from outside of this forum
                    larsbrinkhoff@mastodon.sdf.org
                    wrote sidst redigeret af
                    #21

                    @aka_pugs The 11/74 was cancelled because it was to good compared to contemporary VAX models.

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                    • paul_ipv6@infosec.exchangeP paul_ipv6@infosec.exchange

                      @aka_pugs

                      i was trying to remember the boot sequence for a PDP 11/70 from disk.

                      i think that the 21 addr switches were an octal 17773052 but can't remember what we did with the 7 switches on the right. it was four movements, ending with "start"?

                      anyone remember better than me?

                      T This user is from outside of this forum
                      T This user is from outside of this forum
                      tanavit@toot.aquilenet.fr
                      wrote sidst redigeret af
                      #22

                      @paul_ipv6

                      I guess these switches were, among others, used to read and write memory.

                      I had to program this computer in binary (not assembler, binary) when I learnt computer science some years ago.

                      In my memory, the keys were shades of blue.

                      @aka_pugs

                      1 Reply Last reply
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                      • jwcph@helvede.netJ jwcph@helvede.net shared this topic
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