Hewlett Packard HP 67

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Pocket calculator with card reader.

Pocket version of the HP-97 AC power Magnetic cards compatibility


Pocket version of the HP-97

All of the features of the HP-97 are available with this pocket calculator but integrated into a small keyboard. So, three fuction keys were necessary : f (orange), g (blue) et h (black). For example, have a look at the DSP key:
  • DSP: used alone, it's the function to set the number of decimals.
  • f FIX: with f key, it swaps the calculator in standard display
  • g SCI: with g key, it swaps the calculator in scientific display
  • h ENG: with h key, it swaps the calculator in engenieer display


One specificity, keys from A to E are shortcuts to several maths functions. But as soon as a program is entered in memory (keyed in or with a magnetic card) thoses keys are used to run the corresponding sub-programs.

Visi the HP-97 page for more about their common features!
AC power

The AC adapter of the HP-67 is not the same as the one of the HP-97. This last shares the standard two pins conector used by the HP-41 and most of its peripherals. For the HP-67, it's a three pins connector.

On the picture next, the connector and the trap for the rechargeable battery.


Magnetic cards compatibility

The magnetic cards of the HP-67 can be read and written on the HP-97, and vice-versa. So, a program keyed in the HP-67 can be printed on the desktop calculator HP-97. That's what I did here.

Weight managment

This program allows to track your weight. The features are:
SubProgram A
  • lines 002-006 :
    H, height in cm into R0 and H-100 into R1
  • lines 007-008 :
    exchange with M, the mass in kg into R5
  • lines 009-015 :
    computes the BMI into R2 with this formula
  • lines 016-017 :
    set the display to one decimal and end
SubProgram B
  • lines 019-022 :
    A, the age, computes A/10 into R3
  • lines 023 :
    end
SubProgram C
  • lines 025-026 :
    recalls the BMI from R2 and end
SubProgram D
  • lines 028 :
    clear flag 2 (for a male)
  • lines 029-030 :
    go to label 0 with parameter 4
SubProgram E
  • lines 032 :
    set flag 2 (for a female)
  • lines 033-035 :
    go to label 0 with parameter 2.5


    • Common part Label 0
    • lines 037-046 :
      computes the ideal weight using Lorentz formula into R4
      male :
      female :
    • lines 047-061 :
      computes the fat percentage (BFP) using the BMI and age
    • lines 062-069 :
      if it's a male (flag2 = 0) substract again 10.8
    • lines 070-071 :
      on the stack are the BFP in Y and the ideal weight in X and end
SubProgram c
  • lines 073-076 :
    go to Label 2 with parameter 0.81 (gracile slimness)
SubProgram d
  • lines 078-080 :
    go to Label 2 with parameter 0.9 (normal slimness)
SubProgram e
  • lines 082-084 :
    go to Label 2 with parameter 0.99 (stocky slimness)


    • Common part Label 2
    • lines 086-090 :
      computes the ideal weight accroding to your slimness
SubProgram a
  • lines 092 :
    store the new mass into R6
  • lines 093-096 :
    set Ri=5 to specify R0-R5 and Merge/Pause to read a magnetic card
  • lines 097-100 :
    computes and display on a long pause the mass difference compared to the previous one that was stored on the card
  • lines 101-103 :
    run again SubProgram A with the new mass to get the new BMI, you don't have to re-enter the height and age.
SubProgram b
  • lines 105-106 :
    display Crd, waiting for a magnetic card to record the current data