Specifications for Wang Laboratories LOCI-2

Marketed by: Wang Laboratories, Inc.
Model Number: System #1: LOCI-2A
System #2: LOCI-2AD (Has Optional "LOCI-Printer" 12-Column printer interface)
Serial Number: Two units in museum
System #1: 3070
System #1 Card Reader (First-Design): 23241
System #2: 3086
System #2 Card Reader (Second-Design): 24209
Date of Manufacture: System #1: August, 1967
System #2: September, 1967
Manufactured In: USA, Tewksbury, Massachusetts
Introduced: Base LOCI-2: January, 1965; LOCI 2A: July, 1965
Original Price: $2,750 Base to $8,450 Fully-Optioned
Weight: 45 pounds
Size: 17" Wide, 17" Deep, 11 1/2" High
Power Requirement: 80 Watts, 115 VAC, 60Hz
Display Technology: Top-view Nixie tubes manufactured by National Electronics
Ten tubes w/digits 0 through 9
One "Sign" (+/-) Nixie Tube at left of display
Discrete Neon lamp decimal point indicators
Discrete Neon lamp programmer and status indicators
Logic Technology: Discrete Transistor, 1,275 Transistors (Base System)
Nine Plug-In Circuit Boards, 8-16 1/2"x9", 1-16 1/2"x5" (Base System)
Optional 10th Interface Board (Options C,D & E)
16x12x4 Ferrite Core Memory for memory registers (LOCI-2A)
Digits of Capacity: 10 digits plus sign. No zero suppression.
Decimal Modes: Fully automatic, w/user override on systems without I/O expansion
Arithmetic Logic: Arithmetic for Add/Subtract
Use of logarithms for Multiplication/Division
Math Functions: Add, Subtract, Multiply, Divide
Square Root, 1/Square Root, x², 1/x²
Base e Antilogarithm
Constant: No
Memories: Base LOCI-2 System: 2 Flip Flop-based Store/Recall Memory Registers
Option A: 16 Store/Recall Memory Registers organized as four banks of four registers each
LOCI-2A Memory registers use non-volatile magnetic core memory
Programmable: Yes, via optional LOCI Punched Card Reader or Manual Entry of Instructions (one at a time) from console
80 program steps per punched card
Option B: second punched card reader for programs up to 160 Steps
Peripherals/Options: Option A: 16 memory registers (four banks of four registers)
Option B: Second Punched Card Reader
Option C: Teletype Model 33-ASR I/O interace
Option D: Wang "LOCI Printer" 12-Column Printer Output Interface and Printer
Option E: Enhanced Teletype Model 33-ASR I/O interace
Option H: Teletype Model 33-ASR terminal for use with Options C or E
Performance: Addition/Subtraction: 0.5ms average
Multiplication/Division/Logarithm/Square Root: 40ms average
Notes: Wang Laboratories' first programmable calculator

Known Existing LOCI-2 Calculators: 9
Serial #Unknown, Model 2(Unknown Options): Computer Museum of America, Roswell, Georgia USA
Serial #2734, Model 2AB: Kenneth E. Behring National Museum of American History
Serial #2814, Model 2A: Rhode Island Computer Museum (RICM)
Serial #2856, Model 2AD: The Computer History Museum
Serial #3010, Model 2AD: Dawn of Personal Electronic Calculators & Computers(DOPECC)
Serial #3026, Model 2AC: Rhode Island Computer Museum (RICM)
Serial #3059, Model 2A: Michael Dunn's Museum of Calculators and Other Oddities
Serial #3070, Model 2A: The Old Calculator Museum
Serial #3086, Model 2AD: The Old Calculator Museum

Reference: Wang LOCI-2 Service Manual (Courtesy of bitsavers.org)
Wang LOCI-2 Reference Manual

Previous Machine: Facit 1121
Next Machine: SCM Cogito 240SR

Related Machines: Wang LOCI Column Printer
Wang 360E
Wang 360SE
Wang 362E
Wang 720C
Wang 600
Wang C-52

Advertisements: 1617: "Napier's Bones" an Inspiration... [60K]
LOCI-2 Desktop Computers [39K]
How many programmable calculators... [172K]
"Compute your problems at your desktop... [5 Pages] [53K]

Reading: Lessons, an Autobiography
Author: Dr. An Wang with Eugene Linden
Publisher: Addison-Wesley
First Printing: August, 1986
ISBN: 0-201-09400-2

         Riding the Runaway Horse: The Rise and Decline of Wang Laboratories
Author: Charles C. Kenney
Publisher: Little, Brown and Company
First Printing: 1992
ISBN: 0-316-48919-0

Back to Exhibit
Back to Calculator List

Copyright ©1997-2023, Rick Bensene.

All content on this site is not to be gathered, scraped, replicated, or accesed in any way for any use in populating machine learning or intelligence (Artificial Intelligence, a.k.a. AI) databases, language models, graphs, or other AI-related data structures. Such use is a violation of copyright law. Any such access will be reported to the Oregon Attorney General and prosecuted to the fullest extent the law allows.