|HP codename, series
|Type, Precision, Input Mode
||Scientific, 10 BCD digits, exponent ±99,
||Unmerged instructions, no editing, no
||1.0. One of the slowest computers in my
||20 registers, 49 program steps
||13 digit 7 segment red LED plus sign
||Built-in accurate quartz timer, linear
conversions. The timer software was present in the HP-45 as well but wasn't officially
due to the lack of an accurate crystal. Once in timer mode (enabled by a switch below the display), the
commands are available:
- R/S toggles timer between running and stopped.
- CLx resets the timer to zero both in stopped and
- EEX turnes on/off the 1/100th second display.
- 1 - 9 stores the current time in the corresponding
when the timer was running or recalles the stored time when the timer
|Original Pricing, Production
||1.1.1975 ($395) - 3.1.1977 ($335)
DM 1150 in 1976 (according to Kurt Pribil).
||3x AA pack or AC power supply
||Length 15.1cm, Width 8cm, Height 3.6cm
Owner's Handbook (PDF, English, 108 pages, 2/1975)
Kurzanleitung (PDF, German, 33 pages, 12/1974)
Quick Reference (PDF)
||HP's sixth calculator and the second
after the HP-65. It's outstanding
is the built-in timer with its support for up to 10 split time
Other than that pretty straight forward with a quite poor programming
similar to the HP-25C.
|Registers used for summation and linear regression:|