| Manufacturer: |
Tektronix, Inc. |
| Model Number: |
31 |
| Serial Number: |
Four Units in Museum |
|
#1: B052789 |
|
#2: B031961 |
|
#3: BB09 |
|
#4: No Serial Number - Prototype |
| Introduction: |
August 2, 1973 |
| Date of Manufacture: |
Exhibited Calculator, SN B052789, Late 1973 |
| Manufactured In: |
USA, Beaverton, Oregon |
| Original Price: |
$2,850 Base Price at Introduction |
|
$700 Option 01 Printer |
| Weight: |
32 Pounds |
| Size: |
8 3/4" Wide, 15 1/4" Deep, 6" High |
| Power Requirement: |
100 Watts Max, Jumper Selectable 120/240V AC, 60Hz |
| Display Technology: |
Gas Discharge Modules, Sperry SP-332(2-Digit) & SP-333(3-Digit) modules |
|
Leading Zero Suppression (except at clear, display reads 0.000000000) |
| Logic Technology: |
Custom AMI-made (to Tektronix Design) 13 device LSI Chip set |
|
Chip set essentially functional equivalent of the Cintra 909 calculator |
|
Part Numbers: (AMI Cxxxx/Tek 156-xxxx-00) |
|
C8684/0235, C8685/0231, C8686/0232, C8687/0233,
|
|
C8688/0234, C1836/0239, C1837/0240, C1838/0242,
|
|
C1839/0237, 2xC1840/0238, 2xC1841/0236, C1842/0243,
|
|
C1843/0241
|
|
7400-Series TTL ICs for miscellaneous logic
|
|
Intel 2102/Signetics 2602 1Kx1 static RAM for program/memory storage
|
|
Two Main Circuit Boards (calculator and programmer)
|
|
Memory board(s) piggyback on programmer board
|
| Digits of Capacity: |
10 mantissa, 2 exponent, both with sign
|
|
12 digits calculated, 2 guard digits not displayed
|
| Decimal Modes: |
Floating and Normalized Scientific Notation
|
| Arithmetic Logic: |
Full Algebraic Logic w/heirarchy and parenthesis
|
| Math Functions: |
Comprehensive, see exhibit for details |
| Constant: |
No |
| Memories: |
Depends on memory configuration: |
|
Standard: 512 Program Steps, 64 Memory Registers
|
|
Option 02: 1024 Program Steps, 128 Memory Registers
|
|
Option 03: 1536 Program Steps, 192 Memory Registers
|
|
Option 04: 2048 Program Steps, 256 Memory Registers
|
|
Option 05: 2048 Program Steps, 640 Memory Registers
|
|
Option 06: 3584 Program Steps, 448 Memory Registers
|
|
Option 07: 5120 Program Steps, 256 Memory Registers
|
|
Option 08: 2048 Program Steps, 1000 Memory Registers
|
|
Option 09: 5120 Program Steps, 640 Memory Registers
|
|
Option 10: 8192 Program Steps, 256 Memory Registers
|
|
Serial #B031961 Equipped with Option 02
|
|
Serial #B057289 Equipped with Option 09
|
| Programmable: |
Yes, Extensive Features |
|
Learn-mode program step storage of up to 8192 steps (see Memories)
|
|
Complete branching, with labeled jumps
|
|
One-level subroutine capability
|
|
Program-controlled load/store to/from Mag-Tape (Chaining)
|
|
Programmer implemented with 7400-Series TTL Logic
|
| Peripherals: |
Optional built-in 16-column alphanumeric thermal printer (Option 01)
|
|
Built-in magnetic cartridge tape drive
|
|
External device control via I/O interface (Similar to early GPIB)
|
|
Single ROM pack slot for ROM-based applications
|
|
Type 152 General Purpose BCD Interface
|
|
Type 154 RS-232C Serial Interface
|
|
Interface to Tektronix 4661 Digital Pen Plotter
|
|
Model 31/10 Graphics System
|
|
Model 31/53 Instrumentation System
|
|
Provides programmatic reading of display from specific modified Tek TM500-Series instruments
|
|
Special Tektronix TM503 TM500-Series Instrument Mainframe
|
|
Tektronix Type 153 Instrument Interface Unit
|
|
Specifically modified Tektronix DM501 Digital Multimeter Instrument
|
|
Specifically modified Tektronix DC503 Counter/Timer Instrument
|
| Calculator Performance: |
Add/Subtract: 8ms
|
|
Multiply: 15-25ms
|
|
Square: 10-25ms
|
|
Divide, 1/x 15-20ms
|
|
Square Root 30-50ms
|
|
ex: 8-10ms
|
|
Loge(x): 8-10ms
|
|
Sin: 120-140ms
|
|
Cos: 140-160ms
|
|
Tan: 70-100ms
|