16 Nov
2005
16 Nov
'05
3:59 p.m.
>>>> "Allison" == Allison
<ajp166 at bellatlantic.net> writes:
Allison> F11 machines are a good workhorse 11s. As far as my data
Allison> goes all of the chip (F11 and J11) cpus on unibus are faster
Allison> by some amount as there isn't the multiplxed address/data
Allison> bus transaction. Though I believe the real reason was to
Allison> preserve the unibus IO investment and generally higher IO
Allison> transaction rate that unibus devices enjoyed.
I thought it was the other way around, because Qbus has burst mode DMA
which Unibus does not have. But I don't remember specific data.
paul