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Voyager series, logic PCA and keyboard PCA



#4

Hello and thanks for the help in advance.

Pictured are the three PCA versions I have in my collection (ignoring all the 12C variations of late!). These are the ones during the production run of the Voyagers from 1980 to about 1989.

-3 variations of the 11C circuit board
*the early two-piece-PCA; logic/LCD flex PCA and keyboard PCA
(1980)
*the early one-piece-PCA-two-ICs
(1985)
*the one-piece-PCA-one-IC
(1989)

Here is an HP-10C early version two-piece-PCA (I have an 11C with the a similar board):

Here is an early one-piece-two-ICs HP-11C:

Here is the one-piece-PCA-one-IC HP-11C:

My questions are,

- Were all the early versions of the 10C to 16C a two-piece-PCA system (I have only two examples; a 1980 11C and a 1982 10C). First picture.

- Was the one-piece-two-ICs an intermediate between the two-piece-PCA and the one-piece-one-IC version? Second picture.

- Was the final iteration the one-piece-PCA-one-IC pictured? Third picture.

Cheers, and thanks.

Edited: 28 July 2009, 3:08 p.m. after one or more responses were posted


#5

I. Yes. I've seen all five models in the two-PCA form. (I've never seen a 10C in single-PCA form.)

II. Yes

III. There were multiple "one-chip" variants. The 11C, 12C, 15C, and possibly the 16C had a variant using the 1LQ9 chip (with a 1LH1 in the 15C). The 12C went through two further single-chip revisions prior to the recent ARM-based platform, using the 1RR2 and 2AF1 chips.

Note that the 15C always has one more IC than the other Voyagers, so the "one-chip" 15C variant has two chips.


#6

;-)


#7

Well, the conference registration list at http://holyjoe.net/hhc2009/reglist.htm seems to indicate that Eric is already registered for HHC2009. He's been to just about every one in the past ten or so years, so I'd bet the answer to be "yes".

Jake

P.S. - 27 people have now registered....


#8

Or maybe that was a plug for the conference ;-)

#9

Yes, barring some unforeseen catastrophe, I expect to be there. I have in fact experienced several unforeseen catastrophes recently, but perhaps it is good fortune to have gotten them all out of the way well in advance of the conference.

#10

Just out of interest, is there any difference in current draw between the 1 and 2 chip versions?

Mark


#11

I haven't measured them, but I'd be surprised if the 1LQ9 version didn't have slightly lower current drain than the earlier versions. The 2AF1 version that ran on a single CR2032 probably had even lower current drain than the 1LQ9.

Edited: 28 July 2009, 4:21 p.m.


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