On 04/27/2011 04:47 PM, k6...@comcast.net wrote:
Saying that the HP59309A clock is an HP-IB device is somewhat misleading...
It's a very early HP-IB device. No microprocessor control. Not even the complex
state-machine of the 8660 series.
I'm doing this from memory, but it's like your memory of the dry heaves -- a
little fuzzy around the edges, but still intense...
You have an HP-IB command to reset the clock.
Then you have HP-IB commands to increment different fields.
So to set the date to the 13th, you send the increment date command 13 times...
I think you get the idea.
The resulting code to set the clock is easy enough to write, and once you write
it, you never, ever want to look at it again.
Well, I guess it is interesting in its own pathological way...
Not completely surprising for early age.
At least it has GPIB control. It's not bad, even if a bit un-smooth
interface.
As comparison, I just had my year-counter ripple and even carry the
second digit, and I just have no control over it. No GPIB, no serial
port, not even DIP-switches. So an archaic interface for time is luxury.
Cheers,
Magnus
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