HP Forum Archive 21

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[WP-34s] can't flash with calc_ir.bin Message #1 Posted by Alexander Oestert on 3 May 2012, 5:08 a.m. I'm preparing my WP-34s for crystal and IR. In order to do so, I thought it best to flash it with IR-enabled firmware beforehand. I use SAM-BA 2.10, always do the whole ERASE procedure before flashing. I tried calc_ir_full.bin 2935, calc_ir_full.bin 2931 and calc_ir.bin 2918 - no success. SAM-BA seems to do its transmitting work properly, but the WP-34s doesn't turn on afterwards. Before, I had calc_full.bin V3 2781 on the machine, I re-flashed the calc with this version in between the IR-firmware tries and afterwards and it always worked. EDIT: The same result with MySamba: no flashing with IR firmware, ok flashing with 'normal' calc_full.bin 2781. Any ideas and suggestions are welcome! Edited: 3 May 2012, 5:36 a.m.

Re: [WP-34s] can't flash with calc_ir.bin Message #2 Posted by Walter B on 3 May 2012, 6:00 a.m., in response to message #1 by Alexander Oestert Don't do it! See page 126 of the manual - AFAIK this chack is done automatically in the IR-image.

Re: [WP-34s] can't flash with calc_ir.bin Message #3 Posted by Alexander Oestert on 3 May 2012, 6:14 a.m., in response to message #2 by Walter B Thanks, Walter. But I'm not sure I understand: you're suggesting the 'On+C' check is done when flashing with the IR image and the calc hangs without me doing 'ON+C' by hand? Meaning I have to solder first and flash then?

Re: [WP-34s] can't flash with calc_ir.bin Message #4 Posted by Walter B on 3 May 2012, 6:18 a.m., in response to message #3 by Alexander Oestert Quote: Meaning I have to solder first and flash then? That's my recommendation. I'm not 100% sure *when* the HW check is done by the FW, but it does it IIRC.

Re: [WP-34s] can't flash with calc_ir.bin Message #5 Posted by Paul Dale on 3 May 2012, 6:20 a.m., in response to message #3 by Alexander Oestert The IR (and stopwatch) image knows that you have a crystal installed and tries to initialise this instead of the R/C clock at power on. If you don't have a crystal installed, the device hangs. If you do it comes good after a second or two. The On+C check isn't even present in the stopwatch and IR images. Saves a few bytes not having the check. - Pauli

Re: [WP-34s] can't flash with calc_ir.bin Message #6 Posted by Alexander Oestert on 3 May 2012, 7:10 a.m., in response to message #5 by Paul Dale Aaaarggghhh! I managed to solder everything in and while reassembling the case I broke the glass of the LCD. Now I will never know if I did it right... Let's see if I can come up with the courage to try it on the next machine... Edited: 3 May 2012, 7:10 a.m.

Re: [WP-34s] can't flash with calc_ir.bin Message #7 Posted by Paul Dale on 3 May 2012, 6:30 p.m., in response to message #6 by Alexander Oestert I did this one too :-( Well, broken the LCD and black stuff leaked but not the glass. You have to be careful to make sure the LCD is well seated when reassembling. - Pauli

[WP-34s] DID IT! Printing works! And STOPW! Message #8 Posted by Alexander Oestert on 3 May 2012, 8:49 a.m., in response to message #1 by Alexander Oestert After the disaster of the first try, I took my second WP-34s apart and succeeded in a fairly short time (5 minutes tops) to solder in the crystal and the IR diode, although at the moment the wires of the IR diode just stick out of the natural wholes in the case. I have not found a place to fit the diode after the position on the top of the calculator supposedly resulted in the LCD damage, maybe because the wires I used were to thick and pressed on the back of the LCD. Anyway, I have photographed all the details and will eventually put together a little How-To pdf. Thanks to the WP-34s team, especially Marcus for making printing possible!

Re: [WP-34s] DID IT! Printing works! And STOPW! Message #9 Posted by james summers on 3 May 2012, 8:57 a.m., in response to message #8 by Alexander Oestert Excellent! Looking forward to seeing your pdf as I plan to to do the Xtal and IR mod to my WP 34S when I get it up and running. Cheers James

Re: [WP-34s] DID IT! Printing works! And STOPW! Message #10 Posted by Alexander Oestert on 3 May 2012, 9:08 a.m., in response to message #9 by james summers Don't hold your breath. This will at least take a couple of days.

Re: [WP-34s] DID IT! Printing works! And STOPW! Message #11 Posted by james summers on 3 May 2012, 12:55 p.m., in response to message #10 by Alexander Oestert No worries, it will be quite sometime before I get to that stage, still waiting to get the flashing cable and 30b and then there will be plenty of familiarisation (and playing) time before I start poking around inside!

Re: [WP-34s] DID IT! Printing works! And STOPW! Message #12 Posted by Katie Wasserman on 3 May 2012, 11:23 a.m., in response to message #8 by Alexander Oestert I used 28 AWG wire-wrap wires that run underneath the LCD. They are thin enough so that as long as they don't cross they will have no effect on the LCD or glass. I've taken my calculator apart and put it back together many times with these wires in place and only once (when they crossed) has there been any issue. The crossed wires caused a slightly dark spot on the LCD at the point of crossing.

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