Flashing the WP34s

[Elite]

(11-23-2014 07:28 PM)BarryMead Wrote:  I too had assumed that the poster was confusing the 6-pin serial programming header with the jtag connector but didnt' want to mention it. He could wire his USB board to the 6-pin serial programming header if he wants, but that would just make the wires longer.

Actually you have assumed correctly. I was thinking until now that the serial port is the JTAG.

I now have to ask: Where is the JTAG connector?

While looking through older posts I found this one:

http://www.hpmuseum.org/cgi-sys/cgiwrap/...ead=186826

Here Macus describes making a serial cable for the WP34s.

I noticed that the wire to JP5 is soldered on the right hand side in comparison to Harald's board (left hand side).

Compare: http://www.hpmuseum.org/cgi-sys/cgiwrap/...ead=223186

That shouldn't make a difference? Also I think that this method easier because you don't have scrape off as much plastic as when installing the USB board.

Let's assume that I connect the serial board to the six pin serial port, I would still have to remove LB1/2 and connect the battery terminals? In case I decide to remove the board e.g. to transplant it to another WP34s would that first calculator continue working with batteries only?

I do have another question regarding the crystal:

Here: http://www.hpmuseum.org/cgi-sys/cgiwrap/...ead=209206

it says that one should press On + C + C after every update in order to tell the system that you have a quartz installed. I am a bit confused? Could someone ellaborate?

Elite