DATAMATH CALCULATOR MUSEUM
|Date of introduction:||January 19, 1974||Display technology:||LED|
|New price:||$795 (MSRP 1974)||Display size:||10 + 2|
|Size:|| 5.9" x 3.2" x 1.40"
151 x 81 x 36 mm3
|Weight:||10.9 ounces, 308 grams||Serial No:||1333A23534|
|Batteries:||3*NiCd AA-size||Date of manufacture:||wk 33 year 1973|
|AC-Adapter:||HP-82002||Origin of manufacture:||USA|
|Precision:||10||Integrated circuits:||HP65-CPU, Mostek MK6111...MK6113|
|Program steps:||100||Courtesy of:||Ken H. Meine|
Hewlett-Packard introduced on January 19, 1974 with the HP-65 the World's first Pocket Programmable Calculator. A marvel of engineering at its time, the HP-65 accommodates in a housing only slightly larger than the legendary HP-35 a card reader for its tiny magnetic strips to archive programs. Users could store programs with up to 100 steps on the cards or buy pre-programmed cards from either Hewlett Packard or third party companies.
The HP-65 was replaced after 2 years with the HP-67 featuring 224 merged program steps and 26 memories instead of 100 partially merged program steps and 9 memories. Compare these specifications with both the Texas Instruments SR-56 and SR-52 programmable calculators.
The HP-65 uses the Reverse Polish Notation with the [ENTER] key instead the usual [=] key and takes the responsibility for:
• The Death of the Slide Rule
• The never ending Rivalry between TI and HP calculators users
• The cat and mouse game leading to products like the HP-67 or TI-59
the featured HP-65 with
Date code 1333A
manufactured in August 1973 by
Hewlett Packard in the United States reveals a very solid design centered around
a Hewlett Packard proprietary CPU (Central Processing Unit) with multiple
Integrated Circuits (ICs) mounted in a ceramic package and supported by three
MK611X ROMs (Read-only Memories) with a capacity of 1,024*10 Bits, each and
manufactured by US semiconductor company Mostek. Please notice the Date codes on
these chips, they were manufactured between week 10 and week 32 in the year 1974
- an obvious sign for some update of the microprogramming of the HP-65.
Learn more about Mostek Calculator Integrated Circuits.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, May 3, 2002. No reprints without written permission.