13 Dec
2003
13 Dec
'03
9:50 a.m.
On Dec 12, 10:32, emanuel stiebler wrote:
Patrick Finnegan wrote:
> From what I understand, the 11/73 and 11/83 are both J-11 cpus, the
only
> difference being that the /73 runs at 15MHz and
the /83 runs at
18MHz.
the 11/73 is a double, the 11/83 is a quad size board, 11/83 has also
PMI, and was at the beginning a 15 MHz.
No, not true. There are both dual and quad 11/73 (the quad being an
11/73-plus). The 11/73 was 15MHz, the 11/83 was always sold as 18MHz.
OH, and the 11/83 has a very nice verbose Boot-PROM
;-)
So does the 11/73, though it's different.
Source: personal experience of field servicing all of the above types,
plus the Micro-PDP-11 Maintenance manual.
--
Pete Peter Turnbull
Network Manager
University of York