MINUTEiLt\N "I' GENER,i\L PURPOSE DlGlTP,L COfJPUTERSAND HELATED INERTIAL GUID/\NCE EQUiPf,lENT

INTRODUCTlor~:

This bulletin provides information on the Minuteman tiP' General Purpose Digital Computer and related inertial guidance equipment scheduled to become available during
the next 4 years.

Detailed availability of systems will be provided when reported

by Air Force. The original acquisition cost per system was approximately $234,000.
These systems and/or computers are ao/ailable for redistribution to qualified agencies,
through appropriate ADPE Reu tillza tion chann eis on an "AS IS" non-reimbursable basi.s,

as follows:
DoD ACTIVITIES:--------Contact respective service Hqs for ADPE acquisition approva1.
DEFENSE CONTR~CT (PROFIT O~J'T0T F~HOFIT) FO~ySE O_li._~Q0T~r~S;_T
OR GRANT:Contact your contracting officer for guidance in acquisition and for forwarding ofapproved documentation to DARO for requirements.
~GENCIE~_~~i' THE F~DERA1~GOVERNME_~TT 9THEI~ THAN DoD ACTIVITIES:Contact General Services Administration, Federal Supply Service, ATTN: Excess

Equipment Utilization Branch: Crys~al Mall Building 4, Washington, D. C. 20406.
qVIL AGENCY CONTRACTOR (PROFIT OR N?T FOr~J:.ROFIT) FOR USE ON
CONTRACT OR GRANT:
Contact your contracting officer for acquisition tJuu GSA (address shown above).

AUTHORIZED DONEES:
Contact your local s tate surplus property officials 'for acquisition thru Department
of Health, Education, and Welfare, Division of Sur~l,us Property and Utilization,,,.'.-.

4452 DHEW North Building, Washington, D. C. 20201.

2

Various spare parts, test equipment and accessories, valued at approximately 1.5 ,milliondollars, will also become available. Each acquiring activity must fund for packing,crating, shipping and/or desired repairs. The total systems have a security classification of "CONFIDENTIAL", however, removal of the gyros and velocity meters from thestable platform, downgrades the balance of the system to unclassified. Technicalmanuals, lJianufacturers drawings and training manuals are available, as required, thru
DAROj however, they are of limited value for operation in other than missile guidance
applications. A users group has been es tablished to support both hardware moJifications
and software to utilize these computers in a general purpose mode. Recommend thisbulletin be held for future reference as additional Minuteman "I" computers will be reported available. Department of Defense 3cH vities will be notified of availability in
the Defense Excess ADP Equipment Bulletin.

3GUIDANCE BODY SECTION,t"'j.'-~;.)

1. I

GENERAL DESCRIPTION:
The Guidance Body Section provides the guidance set the capability of becoming an integral part of the missile skin, when installed. This section may be removed and will haveno effect upon the operation of the remainder of the guidance sys tern if reutilized for otherpurposes.
4STABLE PLATFORM

A. GENERAL DESCRIPTION:
1. The stable platform is composed of a support structure, two gyros, three velocity-meters, three gimbal motors, three gimr~l digital resolvers, an alignment set,apitch transformation resolver and an excitation amplifier.

2. The stable platform has gimbal travel limits as follows:
Roll Axis- 70 to -140 Degrees

Pitch Axis

+100 Degrees

Yaw Axis+ 20 Degrees

The platform coordinates consist of three orthogonal (right angle) axes, X, Y,and Z. The X Axis is the down range or yaw axis and the Y and Z axes are pitch
and roll axes -respectively. Mounted on each axis of the platform is a screw towhich is fastened balancing weights. The platform can be balanced in each axis
by the positioning of these weights.

3. The stable platform has three main coordinate systems; the platform coordinates,
the gyro coordinates and the velocity meter coordinates. The platform is held
stable by the gyros and its sole purpose is to provide a stable reference for mounting the inertial measuring instruments.

5

STABLE PLATFORM,.~_-:.. . . . ._". . :.~w

5 . .

P L A T FOR. IY\SECURITY CLASSIFICATION:
The Stable Platform carries a security classification of "CONFIDENTIAL." This isdue to the two gyros and the three velocity meters being classified. Only agencies
having the proper security environment are eligible to receive the complete stable platform. Proof of security must be furnished at time of request.

6

B. FUNCTIONAL DESCRIPTION:
The NS-lOQ1 Inertial Navigation System consists of a D17 computer, the associated stable platform, and power supplies. The high degree of reliability and strength was. engineered into this· equipment for use in the weapons system. A 28V DC regulated power
supply capable of supplying 2S amperes must be provided for operation of the computer.
An additional 40V DC power supply is required if the stable platform is to be operated.
The 24-bit, 2727 word memory for this serial machine is a ferrous oxide coatedmagnetic disc which rotates at 6,000 RPM. Computer operations are synchronized by a345.6 KHz clock channel. The word time is 78 1/8usec. The execution time for basic instructions is one word time for either II-bit single precision or 24-bit double precisiondata. Single precision multiply requires seven word times and thirteen word times are required for double precision multiply

Parallel processing such as the execution of two

identical single precision add, subtract, shift, or multiply instructions is possible. Simultaneous execution of a store operation is possible coincident with the initiation of operations such as add, subtract, and multiply. Eight rapid access memory loops also providefor increased speed of execution.
The D17 has special facilities for handling various types of data, but all peripheraldevices and interfaces must be provided separately. Dedicated registers for I/O transfers
reduce the housekeeping requirements common to many computing sys terns. The program. and data can be read from punched paper tape at the rate of 800 5-bit characters per secondor frolllro.anual.k~board ent[}'. A total of 43 discrete input lines are under program control.
Incremental input data transfers with direct access to memory from peripherals are also
provided. Program controlled outputs include a 4-bit character output, a 5-bit register whichcontrols 28 discrete output lines, 12 analog voltage outputs con trolled by three 8-bit registers, and pulse type output lines.
Program security can be maintained by disabling the ;~'l'ite heads to a portion of thememory to effect a read only memory. By enabling these write heads it is possible to perform instruction and address modification under program control. A library of typical subroutines that can serve as useful tools for many computing problems is under development.

Following is a listing of the repertoire of instructions for the D17 computer.
Numeric CodeCodeDescription

0020, s00 22, s0024, 20026, s
00 30, s
00 32, s
00 34, s0036, s0060, s
04 c, s
10 c, s
20 c, s
24 c, s
30 c, s
34 c, s4002, s40 10, s4012, s
40 20, s
40 22, s4026, s4030, s4032, s
40 34, s
40 42, s
40 44, s
40 46, s4050, s
40 52, s
40 60, s
40 62, s407-, s44 c, s
50 c, s
54 c, s
60 c, s
64 c, s
70 c, s74 c, s

SAL
ALS
SLL
SLR
SAR
ARS
SRL
SRR
COA
SCL
TMI
SMP
MPY
SMM
MPM
BOC
BOA
BOB
RSD
HPR
DOA
VOA
VOB
VOC
ANA
MIM
COM

Split accumulator left shift
Accumulator left shift
Split left word left shift
Split leftword right shift
Split accumulator right shift
Accumulator right shift
Split right word left shift
Split right word right shift
Character output A
Split Compare and limit
Transfer on minus
Split multiply
Multiply
Split multiply modified,Multiply modified
Binary output C
Binary output A
Binary output B
Reset detectorHalt and Proceed
Discrete output A
Voltage output A
Voltage output B
Voltage output C
And to accumulator
Minus magnitude
Complement
Discrete input B
Discrete input A
Halt fine countdown
Enter fine countdown
Load phase register
Clear and Add
Transfer
Store accumulator
Split add
Add
Split subtract
Subtract

DIB

DIA
HFC
EFC
LPR
~LATRA
STO
SAD
ADD
SSU
SUB

9

5':

•

Channel

I5i

Channel

10121416

E loopL register
H loopIT loop,00020406

No flag operation
F loopTelemetry output
Modifiable channel~.

10ELECTRONIC EQUIPMENT CHASSIS

A. GENERAL DESCRIPTION:
The Electronic !3quipment Chassis forms the other h?1f of the system toroid. It
contains the guidance set power supplies for the computer <lnd stable platform, theservo control amplifiers, oscillators and converters. All required external electricalconnections have plug-in features and all components are modular solid state design.
ADDITIONAL INFORMATION:
DoD activities and Defense contractors contact Defense ADPE Reutilization Office:Director, Defense Supply Agency
ATTN: DSAH·LSR/DARO
Cameron Station
Alexandria, Virginia 22314
Telephone AC 202 - OX 46317 or AUTOVON 22-46317
All other Federal Government users and donees contact appropriate representatives
listed on page 2 of this bulletin if interested in acquiring a Minuteman Computer.

BY ORDER OF THE DIRECTOR, DEFENSE SUPPLY AGENCY

W. L. PHILLIPS
Colonel, USAF
Executive,F'~~£_t~::-~'S. A. MacKENZIEColonel, USA
Staff Director, Administration

12* u. S. COVERNMENT PRINTING OFFICE: 1970 434-532/27

DoD 4160.19-1I. CHAPTER IV
ACQUISITION OF EXCESE; ADPESECTION I

quires approval of higher authority and action
is being originated to obtain acquisition approval. If the requiring activity does not require additional approval for acquisition as in
the case of minor ADP items and relawd
equipment, the transfer document will be forwarded to DARO within 15 days.. "Holds"
should be canceled by phone if it is later determined the equipment is not required, oracquisition approval will not be granted. All
calls, inquiries, and correspondenc8 should reference the DoD or GSA Case Number assigned
to the equipment.

40101-Policy. All acquisition of excess ADPE
from other DoD components' or Federal agendes will be processed thru the DoD ADPE Reutilization Office. Transfers of ADPE between
installations of a DoD component do not require processing thru DARO, however, such
intra-service transfers are report.able in accordance with Paragraph 60202 of this manual.
40102-Approval of Requests for Excess ADPE.
Requests for acquisition of major items of excess ADPE must be approved in accordancewith individual component publications indicated in Appendix 2. ~uests for acquisitionof minor items of ADPE and related supplies
not requiring camponent approval may be submitt€d direct to DoD ADPE Reutilization Office for processing.

(2) DARO will:(a) Provide additional information onequipment if needed.
(b) Record the "hold," and advise theactivity placing the hold if previous holds havebeen placed on the equipment requested. In theevent an activity with an earlier hold cancels
their requirement the activity with a later holdwill be advised of the availability of the equipment.

40103-Contracting Officers are responsible todetermine ASPR requirements for acquisitionof ADPE have been satisfied before approving
and forwarding requests for excess ADPE toDARO.

(c) Keep activities placing holds onequipment advised of changes in the availability date of the equipment or withdrawals.

SECTION II
40201-Detennination of Availability.
A. Holds will be placed on exoess by telephone:

B. Multiple Requirements. In the event there
are multiple requirements for major items ofADPE, DARO will ,determine the allocation ofthe equipment based on military urgency andsavings to the Government.

(1) Requiring activity. On determiningthat a requirement exists for excess ADPE
identified in a DSA or GSA Excess ADP Equip~nt Bulletin, the requiring activity will:40202-Requisitioning or" Excess ADPE.

(a) Call DARO and place a "hold" onthe equipment.

A. DoD Components. DDForm 1149, Requisition and Invoice/Shipping Document, will
be prepared and forwarded in original and 3(b) Confirm ~he "hold" in writing within 15 days if acquisition of the equipment re-4-1

~nt excessed by another DoD

D. S~ial Action on Leased ADPE

1~IPD~f~nse contractor, see Appendix~ instructions on completing this Form.
/' s~~ Form 122, Transfer Order Excess PersonalProperty, will be prepared and forwarded inoriginal and 4 copies for equipment excess byother Federal agencies or their contractors. SeeAppendix 7B for instructions on completing
this form.

B. Defense Contractors. DD Form 1419 willbe pflepared in" accordance with Appendix 6,
except the DoD or GSA Case Number will beinserted in Section 5-1 and Sections 46 thru 49
will be completed.
C. DARO. Upon receipt of transfoer documents with necessary approval from the DoD.
component or c~mtracting office, DARO will
fonvard the approved transfer document to theholding activity and advise the requiring activity of a point of contact for final coordination of the transfer.

(1) Releasing Activity. Notify the sup~plier in writing of the' intention of the acquiring activity to further utilize the equipment.
This communication will indicate the name of
the acquiring activity and will state that theacquiring actIvity will contact the supplier.
Copies of his correspond'enoe will be ~urnishedthe requiring agency.

(2) Acquiring Activity. When the acquir, ing a~ency receives a copy of the releasing activity's notice to the supplier, the acquiring ac-,'tivity
contact the supplier and enter into
necessary procurement (lease/purchase) agreements. Special attention should be given to thesuppliers Federal Supply Schedule to ensure
the acquiring activity takes advantage of thefree time generally an owed while the equipment is in transit and undArgoing insbl1ation.

4-2

will

DoD 4160.19-M.Appendix 2
MILITARY SERVICE AND DoD AGENCY PUBLICATIONSE STAB LISHING APPROVAL CH.Al-.11'lliL S FORACQUISITION AND REPORTING OF HAJOR ADPE lTENS
Reporting and acquisition channels for excess ADPE and related support
items:
Army - AR l8-l~Army Information and Data Systems, Objectives andPolicies', 14 February 1966, as changed

AR 18-2,

Army Information and Data Systems and P:r'ocedures
September 1967 as changed

AR 18':"4~

Army Information and Data Systems, Automatic Data
Processing Equipment Reutilization Screening,8 }~rch 1965, as changed

AR 18-7,

Army Information and Data Systems, Data Processing
Installation Management Procedures, and Standards,
29 September 1966 as changed~avy-SECNAVINST 10462. 7B, 11 March 1966, subject: Automatic Data
Processing Program. For reutilization purposes Navy considers''Minor Items" to be support items peculiar to ADPE operations
and leased POO1. Major items include digital and analog computers, systems and components, regardless of initial use OI:'ownership and governrnent owned PCAM.

Air Force- AFR 300-2, subject:

Objectives and Policies

AFR 300-3, subje.ct:

Management Support Data Systems

AFR 300-7, subject:

Resea'reh and Development

AFM 171-9, subject:

Management of Data Processing Equipment

AFM

USAF Supply Manual

67-1, subject:

Defense Atomic SupE9rt Agency - DASA Circular 150-2

A2-1

Defense Communications Agency - DCA Instr,:!ction 630-230-2, Automatic
Data Processing, Reutilization Screeningof Automatic Data Processing Equipment(ADPE) and Associated Equip~ent
Defense Supply Agency -Defense Supply Agency Regulation 4l60~3)
subject: DSA Reutilization Screening ofAutomatic Data Processing Equipment (ADPE)
Defense Supply Agency Manual 8130.1, subject:
Plant Clearan~e .Hanual for 'Contract Administration
Services

National Security Agency -NSA Regulation No. nO-5(C), subject:
Reutilization Screening of Automatic Data
Processing Equipment (U)NSA Circular No. 60-5(C), subject: Excess
SIGI~L Materiel Utilization Program (U)Defense Contractors - Armed Services Procurement Regulations (ASPR)

A2-2