From: David Riley
Sent: Wednesday, March 07, 2012 6:43 PM
On Mar 7, 2012, at 5:33 PM, Dave McGuire wrote:
> On 03/07/2012 05:16 PM, Dennis Boone wrote:
>>> The Nuclear Data ND812 CPU is all wire-wrapped SSI/MSI 7400 series logic.
>> Another production unit that shipped with lots
of wire-wrap on board was
>> the IBM 3803 tape controller. E.g. from Pat's collection:
> Many (most?) DEC backplanes, like the PDP-11/70:
>
>
http://www.neurotica.com/albums/pdp1170/DSCN1161.JPG
Also all of the PDP-10 backplanes, unless I heard
wrong.
My '11 backplane (whose number I keep forgetting)
is a PCB, but
they kindly left wire wrap stakes on the back so I could convert
it to 22-bit.
DEC began using Gardner-Denver wirewrap machines with the advent of the
PDP-7 and FlipChip(TM) circuit boards. Prior to the -7, every computer
built by DEC was hand soldered by teams of engineers and technicians.
(One piece of the PDP-7, the DECtape controller, is shared with the PDP-4,
and is constructed of System Modules(TM) connected by a soldered backplane.)
NB: Those (TM) may be (R). I'm not going to bother to check right now. ;-)
Rich Alderson
Vintage Computing Sr. Systems Engineer
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at
vulcan.com
mailto:RichA at
LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/