20b or 30b for WP34s

[Marcus von Cube]

(11-18-2014 10:14 PM)PANAMATIK Wrote:  AFAIK you cannot read the original flash image from the 30b calculator, because it is protected.

In order to get access to the flash contents you'll need to reactivate the SAM-BA boot loader of the chip. The original firmware does not support this. I don't know whether the access path through the JTAG connector is blocked. IIRC, one of the configuration bits of the Atmel chip can be used to lock out JTAG access to the flash.

Luckily, we have friends to help us out...