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


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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

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