23 Sep
2022
23 Sep
'22
9:55 p.m.
Date: Fri, 23 Sep 2022 18:09:47 +0100
From: Joshua Rice via cctalk <cctalk(a)classiccmp.org>
The Cray was often coupled witha DG nova for
bootstrapping, which very much
did have a front panel on it. Indeed, many models of PDP-10 were bootstrapped
by PDP-11's with front panels, even if the PDP-10 lacked one. The CDC Cyber
however, had "dead start" panels hidden behind shouding, which could be used
in a very similar way to a front panel.
Sorry, only 1 model of PDP-10 was bootstrapped by a PDP-11 (specifically an
11/40 running either KLDCP or RSX-20F). That was the KL-10, featured in the
DECsystem-1080, DECsystem-1088, DECsystem-1090, DECsystem-1099, DECsystem-1095,
DECSYSTEM-2040, DECSYSTEM-2050, DECSYSTEM-2060, and DECSYSTEM-2065.
The 1088 and 1099 were multiple-processor configurations of the 1080 and 1090
or 1095, respectively.
The 1095/2065 was the same hardware, with the expanded cache and MG-20 memory,
with paint color depending on the OS.
The KS-10 processor in the DECSYSTEM-2020 (which never had a Dec-10 designation)
had an 8080 as the front end processor.
The earlier models[1], using the KA-10 or KI-10 processors, had the equivalent
of the CDC deadstart switch or IBM IPL button, and a way to enter the address
of the I/O device from which to boot on the control panel beneath the large
array of blinking lights.
Rich
[1] For completeness: the KA-10 is used in the PDP-10/30, PDP-10/40, and
PDP-10/50 (which oculd be doubled in the PDP-10/55), while the KI-10
is used in the DECsystem-1070 and -1077.