Re: HP 55 and HP 45 restorations Message #2 Posted by Thomas Chrapkiewicz on 18 Jan 2008, 7:44 a.m., in response to message #1 by Geoff Quickfall
The 'Timing Function' in the HP45 was sort of a 'Hardware Easter Egg'. It was not intended to be used; it is NOT documented in the official HP45 documentation. The function was experimental and not quite production ready, but the design engineers wanted to leave access to it in the final machine, planning on having it finalized for the next, newer model, with of course the proper crystal. This was then (obviously) released in the HP55.
They are fine machines. Good luck with your restoration! Looking forward to the pictures.
TomC
ps: See some details here:
http://en.wikipedia.org/wiki/HP35
Edited: 18 Jan 2008, 9:44 a.m.
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