3 Jan
2019
3 Jan
'19
12:48 p.m.
From: Noel Chiappa
Sent: Friday, December 21, 2018 5:19 AM
> From: Mattis Lind
> I cannot figure out which early machine it comes
from.
They're called 'System Modules':
and they were used from the PDP-1 through (I think)
the PDP-7; at least, this
PDP-7 internals image:
seems to show System Modules at the top, and FLIP
CHIPs at the bottom. (I'm
pretty sure even the first PDP-8 - the 'straight 8' - uses only early FLIP
CHIPs - transistorized ones.)
Noel,
The PDP-7 was the first system produced by DEC which used Flip Chip(TM)
technology, as well as the first to be built using a Gardiner-Denver wirewrap
machine instead of hand soldering.
The System Modules(TM) in the PDP-7 chassis at LCM+L make up the 550 DECtape
control for the 555 DECtape drives. The controller was common to the PDP-7 and
the earlier PDP-4 (which was of course all System Modules). They appear in
exactly one place in the entire system.
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computers: Museum + Labs
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputers.org
http://www.LivingComputers.org/