8 Dec
2015
8 Dec
'15
1:42 p.m.
From: Pontus Pihlgren
Sent: Tuesday, December 08, 2015 4:03 AM
I've seen a memory assembly from a PDP-15 and it
looks very much like
this. Also, if each connector pair corresponds to one bit it adds up to
18 which matches the word lenght of a PDP-15.
Of course, PDP-1, -4 and -7 used 18 bit word lenght,
but they were not
made with flip-chips.
Flip Chip technology was invented for the PDP-7, after the failure of the
large System Modules used in the PDP-6. The only part of the PDP-7 which
uses System Modules(TM) is the DECtape controller for the 555 DECtape
drives.
If you'd like to visit the museum, I'll happily show you the internals of
a running PDP-7. :-)
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/