28 Feb
2003
28 Feb
'03
1:29 a.m.
--- "Jerome H. Fine" <jhfinepw4z(a)compsys.to> wrote:
The DZ11 used all 16 channels...
The DZ11 I am familiar with is a single card with 8 UARTs. Could
you be thinking of a different serial card, or were there perhaps
two DZ11s?
Until about 1982, the 11/23 was the high end in the
Qbus systems.
Is that what you meant?
What I meant was when people interested in cheaper PDP-11s switched
from buying 11/04s and the like (new) went to buying
11/03s and
11/23s without the MMU. Software Results changed from building
HASPBOXes out of PDP-11/04s to 11/23s around 1982 or so, for
example, as the cheapest box that they could use to run the Bisync
protocol engine that preceded the COMBOARD.