31477Re: [midatlanticretro] VAX 780 vs. 750
- Jul 1, 2013David Riley <fraveydank@...> writes:
>--BqNHK9zXsP9xi-rTkNIg4ETyjTgaeSiFZoZGmiMThe 11/780 was the first VAX. It was built primarily with discrete TTL logic.
>Content-Type: text/plain; charset=us-ascii
>On Jul 1, 2013, at 2:30 PM, "Evan Koblentz" <evan@...> wrote:
>> I know the /80 was first; how did the /50 differ?
>The 11/750 was a smaller, slower, cost-reduced version of the 11/780. The
>11/730 (even later), was a smaller, even slower, further cost-reduced version
>of the same. My recollection is that most of the size and cost reduction was
>accomplished by using more highly integrated gate arrays to replace discrete
>TTL logic chips (which, at the time, were faster than the gate arrays).
>I believe the 11/730 was small enough to be easily rack-mountable, while the
>11/750 occupies most of a short cabinet. I could be misremembering, though;
>I've never actually seen any in the flesh (part of why I'm excited for the
The 11/750 was subsequent to the 11/780 and was built using Gate Arrays. Both
the 11/780 and the 11/750 implemented the full architecture instruction set of
304 instructions and all 13 (if I've recalled and counted correctly) address
modes. The 11/750 was significantly smaller and less expensive. I'd take, if
I had the power, an 11/780 over an 11/750 any day.
FYI, Evan, you'll need 208V 3-phase for the 11/780 and, likely, many other of
the older kit that's been amassed.
Has details on installation and site requirements for the 11/780.
VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG
Well I speak to machines with the voice of humanity.
- << Previous post in topic Next post in topic >>