FDDI, was: Re: [rescue] u2 drive trays
m_thompson at ids.net
Wed Aug 20 16:17:56 CDT 2003
>> >> Yeah that'd be neat...I just wish Qbus weren't so blasted SLOW.
>> >> Qbus was a introduced as a smaller, lower-cost alternative to
>> >> Unibus,
>> >> which runs at TWICE the speed of Qbus. (Qbus multiplexes the address
>> >> and data lines on the same backplane wires) If they really had to
>> >> discontinue one and keep the other, they should have kept Unibus!
>> >> So much for "newer" automatically being "better".
>> > XMI?
>> > VAXBI?
>> But those *are* better.
>Yes, and they should have discontinued both UNIBUS and QBUS in favor of
>them both, but they were still doing QBUS until the end of the VAX
>development. I would have loved to have a BA440-sized cabinet that used
>a 4000/700-speed CPU with a VAXBI or XMI bus instead of the QBUS.
There was a little issue with the $250,000 license fee to develop boards on
the VAXBI bus that killed its acceptance.
E-Mail: M_Thompson at IDS.net
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