16 Sep
1999
16 Sep
'99
3:51 a.m.
I have a VaxStation 3520 in the garage that seems to
boot.
If you either yank the graphics cards or hold the halt button in
during reset it'll use the MMJ as a serial console.
It seems like a really nice box
except for the BI bus
That's M-Bus, not VAXBI.
(it has Qbus too!),
If you have the FTAM (Firefox Tape Adapter Module), you can only use
QBus devices that can tolerate upwards of 20 microseconds bus latency
(I have a specially modified RQDX3 somewhere...). If
you have the FQAM (Firefox QBus Adapter Module, designed after it
became apparent that FTAM was in trouble) the latencies are acceptable
but the QBus throughput is only about 250KB/s.
Welcome to the magic of write-back cache.
Roger Ivie
ivie(a)cc.usu.edu