looking for documentation for 1963 minuteman missile computer

From: Russ Blakeman <rhblakeman_at_kih.net>
Date: Mon Oct 15 22:55:16 2001

Most of the older AF missile equipment had an A/D and D/A convertor, usually
sent "discretes" out to the servos, servopositioners, accelerometers, etc.

-> -----Original Message-----
-> From: owner-classiccmp_at_classiccmp.org
-> [mailto:owner-classiccmp_at_classiccmp.org]On Behalf Of Carlos Murillo
-> Sent: Monday, October 15, 2001 9:14 PM
-> To: classiccmp_at_classiccmp.org
-> Subject: Re: looking for documentation for 1963 minuteman missile
-> computer
->
->
-> At 01:02 PM 10/15/01 -0700, you wrote:
-> >I have a little info if it's the D17B (1962)
-> >
-> >(from "Proceedings of the minuteman computer users group" Tulane Univ
-> >1973)
-> >Number system: Fractional binary fixed point 2's complemant
->
-> Makes absolute sense in order to maximize the throuput.
->
-> >Logic levels: 0V = false, -10V = true
-> >
-> >Data word length: 11 or 24 (double precision)
-> >Execution times: add ~78 uSec, multiply ~546 uSec, Double prec multiply
-> >~1015 uSec
->
-> It probably used 24 bit accumulation... I'm impressed. However,
-> that's way too slow to implement any modern scheme (several orders
-> of magnitude too slow).
->
-> It probably used a mixture of analog/digital control; analog
-> for the single-variable, high bandwidth servoing; digital for
-> the higher hierarchy control.
->
-> Carlos.
->
-> --------------------------------------------------------------
-> Carlos E. Murillo-Sanchez carlos_murillo_at_nospammers.ieee.org
->
->
Received on Mon Oct 15 2001 - 22:55:16 BST