|Re: Questions about "flashing" a 30B|
Message #4 Posted by cyrille de brebisson on 17 May 2011, 1:35 p.m.,
in response to message #1 by Andrés C. Rodríguez (Argentina)
a) SAM-BA, serial port and windows7
- I don't know about win7, but Sam-Ba does not work well with USB serial coms... seomthing having to do with the fact that USB is packet based and serial byte based, creates timing issues with most serial designed communication protocols.
I developped an alternative to SAM-BA, which work better, but I was told that it was not detecting serial ports under win7.
bottom line, XP and physical com port is best...
b) Which is the device type in the HP 30B (SAMxxyy)?
c) What are the steps to replace original firmware with a new image?
- connect all, press on reset on cable, press and hold erase on cable, turn calc on, relase erase, press reset on cable, turn calc on (it will not show anything), start SAM-BA program, at end of download, press reset again on cable.
d) How critical is to use an external power supply during the "flash" operation?
- not at all. if you run out of power, repeat as above with new batteries.