WP34s 20b Repurposed

[Marcus von Cube]

(02-22-2015 03:29 PM)John Galt Wrote:  

(02-22-2015 02:05 PM)Csaba Tizedes Wrote:  If possible to make a 34s from a 20B or 30B, therefore is it possible to make a 30b from a 20b? (30b ROM upload to the 20b)??

I suppose it's theoretically possible, but you would need the 30b's ROM code, which Marcus von Cube states is HP's intellectual property.

Well protected IP I must say. You can load the image in an HP 20b but it will stay an HP 20b. The 30b functions are not available. I assume there is some hidden trick to identify the actual hardware and disable certain features depending on it.

[walter b]

IIRC, Tim Wessmann told us some months ago how the 20b and 30b differ. There is a little difference in the HW under the blob AFAIK.

d:-)

[matthiaspaul]

(02-22-2015 07:08 PM)walter b Wrote:  IIRC, Tim Wessmann told us some months ago how the 20b and 30b differ. There is a little difference in the HW under the blob AFAIK.

Yep, see here:

http://www.hpmuseum.org/forum/thread-243...l#pid21873

It should be possible to identify the difference specifically probing for it in a debug firmware. Afterwards, it may or may not be possible to devise a hardware modification to eliminate this difference.

Greetings,

Matthias