I was bored and found a HP-27S

[jebem]

I'm back home (Lisbon district) from my travel from Africa, and had a package waiting for me at the Post Office.

Today I got my new acquisition: a HP-27S in a better condition than I was initially expecting.
Actually the photos enhance all the small imperfections and dust.
Made in Singapure, s/n:3122S04492 (Year 1991, week 22).

It is a fantastic good looking machine, excellent keyboard.
Even the display is very readable and acceptable contrast, considering that the included battery cells are on the weak side
(just 4.16Volt with the calculator powered on).

Thank you all for the above comments on this thread.
Meanwhile I'm discovering the wonderful world of the Pioneer machines.
A HP-42S almost new in the box is waiting for me to collect it from the original owner.
He has bought it in South Africa but he never really used it
(well, that's the story anyway, and I trust people, so I expect this to be true).

I'm publishing here some links to my HP-27S.




Clean battery compartment. IR LED for printing looks good as well.





Power On message. I can tell the same in a bad day...





Some shots of the mandatory Self Test sequence. Pressing CRL + LN...
SPD stands for Speed, right? "1050320" ...
This calculator sports a precise timer to maintain the internal Date and Time.
So it needs some sort of precise timing.











URAM Test... what is it?







Full PI precision in the HP universe.





Almost 7 KByte of memory!




http://3.bp.blogspot.com/-HRqhnwBVhmM/U6...M_7769.JPG