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Manufacturer: |
Cintra Corp./Tektronix Inc. |
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Model Number: |
909 Scientist |
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Serial Number: |
Two Units in Museum |
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#1: Model 909-01, Serial #4605
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#2: Model 909-01, Serial #4220 (Non-Operational) |
| Date of Manufacture: |
#1: Late-1971 |
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#2: Mid-1971 |
| Manufactured In: |
USA, Sunnyvale, California |
| Original Price: |
Base Price $3,780 Cintra & Tek Intro. Price |
TR>
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$3,200 (Base Price, Tektronix, 9/71) |
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$3,700 (Tektronix Price for 909-03 (max. config.) |
| Weight: |
24 Pounds |
| Size: |
14 1/2" Wide, 15" Deep, 8 1/4" High |
| Power Requirement: |
Switch Selectable 115/230 VAC, 45 Watts |
| Display Technology: |
Nixie Tubes Mfg. by National Labs |
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2 - NL847 Sign (Mantissa & Exponent) |
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1 - NL939 0-9 w/Left & Right Decimal (MSD of Mantissa) |
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11 - NL846 0-9 w/Right Decimal (Mantissa) |
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2 - NL844 0-9 No Decimal (Exponent) |
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Custom` "x10" Exponential Notation Indicator |
| Logic Technology: |
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Large number of 7400-Series TTL & Some DTL Small and Medium-Scale IC's |
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Some LSI (Custom Mask-Programmed Read-Only Memory) device manufactured by Electronic Arrays |
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4 - CPN 3130-30, 1 - CPN 3130-31, 1 - CPN 3130-32, |
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1 - CPN 3130-33, 1 - CPN 3130-34, 1- CPN 303-35, |
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1 - CPN 3130-37 |
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Six plug-in Circuit Boards |
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909011: Display Generation Parent |
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909061: ROMs and ROM Addressing Circuitry |
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909101: Shift Register Memory Parent |
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909141: Input Control |
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909191: Shift Register Storage Control Parent(Prior to 7/26/1971 Production) |
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909201: Tektronix-Designed Storage COntrol Board (After 7/26/1971 Production) |
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909211: Option -02 Shift Register Storage Control Parent (Deleted 7/26/71) |
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909221: Tektronix-Designed Option -03 Shift Register Storage Control (After 7/26/1971)
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909301: External Interface Board |
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909341: Nixie Display Board & Drivers |
| Digits of Capacity: |
10 mantissa, 2 exponent, both w/sign |
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Calculations made internally to 12 significant digits |
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Left-Justified, Left Entry, No lead/trailing zero suppression |
| Decimal Modes: |
Full floating or normalized scientific notation |
| Arithmetic Logic: |
Full Algebraic w/PEMDAS Precedence & Parentheses |
| Math Functions: |
Four Function Plus |
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Integerize, Pi Recall, Degree/Radian Conversion |
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Standard & Hyperbolic Trigonometric Functions w/ Inverse |
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Square Root, Square, Reciprocal, Triangle Formula |
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xy, Base e and Base 10 Logarithms |
| Constant: |
No |
| Memories: |
Note: After 7/26/1975, Tektronix updated the base 909/911 to have 26 memory registers |
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and 100 Program Step Memory from Cintra's Base of 26/85 |
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26 Registers [Base & Option -01(Cintra)] |
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100 w/Option -02(Cintra) or Base Tektronix |
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Direct and Indirect Memory Access |
| Programmable: |
Yes, Learn Mode, Linear Only |
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85 Steps of Program Storage (Base/Option 02) |
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256 Steps w/Option -01(Cintra) or -03(Tektronix) |
| Peripherals: |
8-bit Parallel Bus-Style Connection, up to 8 devices |
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- Model 941 Printer ($700) |
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- Model 944 Teletype Interface ($1,390) |
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- Model 923 Punched Card Reader ($350) |
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- Model 915 X/Y Plotter ($2,650) |
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- Model 926 Programmer ($1,495) |
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- Model 928 Instructor ($245) |
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- Model 905 Junction Box ($75) |
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- Model 920 f(x) Repeater ($150) |
| Performance: |
Add/Subtract: 0.6ms |
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Multiply, Divide: 3.0ms |
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Loge(x): 16ms |
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Trig. Functions: 100ms |
| Notes: |
Four different configurations:
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- Model 909: Base Unit, 85 Steps, 26 Registers |
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- Model 909-01: 256 Steps, 26 Registers |
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- Model 909-02: 85 Steps, 100 Registers |
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- Model 909-03: 256 Steps, 100 Registers |
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The Model 911 Statistician replaced four keys with statistics-related functions.
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