OTD 1975, Digital announces the #PDP-11/70
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Remembering that from the PDP 11/10, which only had 16 address switches, accessing a 64 kB address space. BTW note the three-bit blocks for making life easier with octal numbers.
We ran serious software in that. Yes it looks gorgeous, but perhaps the aesthetics wears off a bit after many times manually entering the boot loader through those switches.
We did have Unix on our machine and it wasn't multitasking. But a beautiful CPU architecture, much like the Motorola 6809 that was my next one. Running the Microware OS-9 mini-Unix OS, my entry point to Unix.
@martinvermeer @stevenray @aka_pugs
The picture is missing the yellowed piece of paper with boot instructions, taped to the rack.
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@aka_pugs that interface needs to be resurrected. It is gorgeous!
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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.
@aka_pugs 4 MB must have been a huge amount of memory at that time.
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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.
@aka_pugs There is a retro RasPi version that I totally crave.
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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.
@aka_pugs in 1987 my college was still using one. Default password was pass. Found unassigned accounts and had fun.
Coded a version of Patients/Solitaire on it and one day went into the computer lap and everyone was playing it. #i May have negatively affected the grades that year.Edited to change 1087 to 1987
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@aka_pugs 4 MB must have been a huge amount of memory at that time.
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@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
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@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
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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?
773110 is burned into my brain
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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.
@aka_pugs hmm, my recollection is 128k
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773110 is burned into my brain
boot from tape or different type of disk?
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boot from tape or different type of disk?
I forget. I think we had an RM-80 (maybe?) and two RK-05 removables
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I forget. I think we had an RM-80 (maybe?) and two RK-05 removables
@peterhoneyman @paul_ipv6 RM-80 was after my time.
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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.
@aka_pugs yeah, but not 4MB per process
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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.
@aka_pugs The 11/74 was cancelled because it was to good compared to contemporary VAX models.
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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?
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.
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