The Museum of HP Calculators


HP 9810A Features

Features in optional ROMs are listed as Option.
Features in HP mag card or tape Application Pacs are listed as +.
Other software is not included.

Display and Keyboard HP 9810A
Display type LED
Display format 3 Line
FIXed number format Yes
SCIentific number format Yes
ENGineering number format -
STanDard / ALL number format -
Alpha messages and prompts Printer option
Softkeys labeled by mag. card or overlay Yes
Softkeys labeled by display menus -
Softkeys with neither labeling system -
Status annunciators Yes
Redefinable keyboard -
   
Logic HP 9810A
Logic system RPN
Stack levels 3
Last x -
Undo -
Precedence -
Parentheses -
Storage Addition (STO +) Yes
Storage Arithmetic (STO +, -, ×, ÷) Yes
Storage Exponentiation (STO ^) -
Recall Arithmetic -
Named variables -
Multiple data types -
Directories -
   
Math HP 9810A
+, -, ×, ÷ Yes 
1/x Yes
sq. root Yes
x2 Yes
LOG x Yes
10x -
LN x Yes
ex Yes
yx Option
pi Yes
% -
% change -
INTeger truncation and ABSolute value Option
Trigonometric functions (SIN, COS etc.) Option
Hyperbolic trig. (SINH, COSH etc.) -
# of trig. modes (degrees, radians, grads) 3
   
Advanced Math HP 9810A
Solver / root finder -
Numeric integration -
Complex numbers Limited
Matrix operations -
Matrix writer -
Equation writer -
Symbolic operations -
Fractions -
Plotting and graphics (display) -
Plotting and graphics (printer / plotter) Option
   
Statistical HP 9810A
Mean, standard deviation (# of variables) -
Summation of n, x, x2 -
Summation of n, x, x2, y -
Summation of n, x, x2, y, xy -
Summation of n, x, x2, y, y2, xy -
Summation of lists -
Random number generator -
Linear regression, estimate  -
Curve fitting -
Correlation coefficient -
Normal distribution -
Factorial -
Gamma -
Combinations and permutations -
   
Scientific and Time

HP 9810A

Polar / rectangular conversions Option
Base conversions (2, 8, 10, 16) -
Arithmetic in bases 2, 8 and 16 -
Bit operations (AND, OR, XOR, ...) -
Selectable word size (1-64 bits) -
Selectable complement mode (1's, 2's, unsigned) -
Decimal hrs / hrs.min.sec. conversions -
Hrs.min.sec arithmetic -
Time of day clock -
Timer -
Dynamic calculations (timer × rate) -
Alarms -
   
Unit Conversions

HP 9810A

Centimeters / inches -
Millimeters / inches -
Meters / feet -
Kilograms / pounds (mass) -
Newtons / pounds (force) -
British thermal units / joules -
Liters / gallons -
° Celsius / ° Fahrenheit -
Other -
User-defined units -
   
Time Value of Money HP 9810A
Number of payments (n) -
Interest rate (i) -
Present Value (PV) -
Payment (PMT) -
Future Value (FV) -
   
Cash Flow Analysis HP 9810A
Net present value (NPV) -
Internal rate of return (IRR) -
   
Amortization HP 9810A
Accumulated Interest (ACC INT) -
Balance (BAL) -
   
Depreciation HP 9810A
Straight line (SL) -
Sum of the years digits (SOYD) -
Declining balance (DB) -
   
Bonds and calendar functions HP 9810A
Bond price -
Bond yield -
Date arithmetic / calendar functions -
   
Memory and Programming HP 9810A
Programming language(s) RPN
RAM / Max # of variables or addressable registers 51
Max # of program steps 500
RAM / Max vars or regs with full optional RAM 111
Max # of prog steps with full optional RAM 2036
Merged program steps 

-

Manual register / program memory allocation  -
Automatic register / program memory allocation

-

Overlapped register and program memory -
Continuous memory

-

Flags 1
Conditional tests 3
Subroutine levels 5
Indexed looping (increment by +/- 1, end at 0) -
Indexed looping (choice of increment and end) -
Multiple index / loop registers -
Line number addressing Yes
Branching by relative line number -
Global program label addressing Yes
Local program label addressing -
Indirect / computed addressing and control Yes
Multiple indirection registers Yes
Pause Yes
Alpha messages and prompts in programs Option
Alpha program listings Option
Alpha string manipulation -
Program step insert / delete -
   
I/O and Expansion Features HP 9810A
ROM modules Yes
RAM modules or expansion option Yes
General expansion slots / connector Yes
Magnetic card reader/writer Yes
Tape drive Option
Disk drive -
Upgradeable firmware -
Optical wand -
Serial port -
Infrared input -
Infrared output -
Printer 2 Options
Networking -
Other Digitizer,
plotter,
optical card reader,
large display,
paper tape reader,
typewriter coupler,
etc.
   
General HP 9810A
Sounds -
Self test -
Hard case (in addition to soft case) -
Additional Features -
Batteries -
Length (inches) 19.5"
Width 16"
Height 7"
Weight (oz or lbs) 34 lbs
Year of introduction 1971

Features in optional ROMs are listed as Option.
Features in HP mag card or tape Application Pacs are listed as +.
Other software is not included.

Unlim means limited only by available memory.

HP 9810A notes:
  • Indirection could be nested to any depth by multiple presses of the indirect key.
  • The Alpha Printer ROM allowed alpha messages and prompting on the printer.
  • An optional printer (option 004) could be installed inside the calculator.
  • Math ROM also includes vector addition.
  • Only Math and Alpha printer ROMs are included above so far.

Go to the feature comparison page
Go back to the main exhibit hall