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Specifications for Hewlett Packard 9100B

Manufacturer: Hewlett Packard
Model Number: 9100B
Serial Number: [Not Listed]
Date of Introduction: Mid-1968
Date of Manufacture: 1969
Manufactured In: USA, Loveland, California
Original Price: $4,900 at Introduction
Weight: 40 Pounds
Size: 16" Wide, 19" Deep, 8 1/4" High
Power Requirement: 70 Watts, 115/230 V AC, 50/60Hz
Display Technology: CRT Display, 7-Segment Digit Rendition
Three Stack Registers Displayed
Logic Technology: All Transistor, Diode-Transistor Logic
Microcoded Architecture
Microcode Stored in Special Circuit Board Design
Magnetic Bobbin Microsequence ROM
Non-voltatile Magnetic Core Register Storage (3840 bits)
Digits of Capacity: 10 digits mantissa with sign
2 digit exponent plus sign
Two non-displayed guard digits in mantissa to add accuracy
Decimal Modes: Scientific or Fixed, Thumbwheel Selectable digits behind decimal
Arithmetic Logic: Reverse Polish Stack, Three Levels
Math Functions: Four Function, Square Root
Trigonometric (Normal & Hyperbolic, Inverse) Degrees/Radials
Logarithm: Natural & Base 10, ex
Reciprocal (1÷x), Absolute Value (|x|), Integerize
Coordinate Transformation: Polar\<-\>Rectangular, Rectangular\<-\>Polar, Coordinate Summation
Constant: RPN Logic. Single key recall of π
Memories: 32 (Maximum, Program Steps Consume Register Memory)
Programmable: Learn Mode, 392 Steps (Each 14 steps consumes one memory register)
Conditional & Unconditional Branching
Branch based on Flag status
Subroutine Capability, 5 Deep Nesting
Stop, Pause
Program Single-Step Capability
Magnetic Card Reader/Writer for external Program/Data Storage
Peripherals: 9120A Electrosensitive Printer
9125A X-Y Plotter
9150A Monitor Scope
9160A Optical Mark Sense Card Reader
Performance: (Worst Case, Mfg. Claimed)
Add/Subtract: 2 mS
Multiply/Divide: 35 mS
Square Root: 40 mS
Trig: 354 mS
Natural Logarithm: 56 mS
ex: 141 mS
Notes: All Transistor Construction - No IC's
Follow on to earlier 9100A, which had half the memory and lacked subroutine capability
Hewlett Packard's Second Electronic Calculator
US Patent: 3,623,156A

Previous Machine: Sperry Remington EDC-III
Next Machine: Friden EC-1113

Next in Series:
Hewlett Packard 9810A

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Web Links:
Dave Hicks'Museum of HP Calculators

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