Hi Craig On Thu, May 30, 2024 at 11:03:50PM -0500, Craig Comstock wrote: > > On May 27, 2024, at 1:30 PM, Alexander Huemer <[email protected]> > > wrote: > > > > I am on the hunt for a Calypso phone that isn't functional for > > whatever reason for the purpose of de-capping and photographing the > > Calypso/Iota/Rita ICs that a friendly individual would be able to > > do. > > Isn’t there already such a photo posted here? > > https://osmocom.org/attachments/download/2088/c123_pcb.jpg > > as part of this wiki page: > https://osmocom.org/projects/baseband/wiki/MotorolaC123 > > and also: > http://www.steve-m.de/pictures/compal_e88/ > > Two links on that MotorolaC123 are dead it seems: > https://osmocom.org/projects/baseband/wiki/MotorolaC123PCB?parent=MotorolaC123 > and > http://laforge.gnumonks.org/photoalbum/devices/motorola_compal/c123
Those are pictures of mobile phone circuit boards[1]. What I am after are pictures that show the little silicon dies inside the IC packages that are soldered to those circuit boards. To achieve that, you must (1) Open the IC packages (2) Use a (suitable) microscope to look at the exposed dies See e.g. [2,3]. I myself do not have the required skills or equipment to do so, but thankfully people have spoken up who can help. > I am surprised no one else has piped up with a response to the list. I > probably have a few rather dead calypso phones I could take better? > pictures of for you. :) Thanks for the offer, but donor phone sourcing has already been taken care of. One deal I got on kleinanzeigen.de was pretty convincing. The phone itself was free because the display damaged. Shipping to one of the decapping specialists was € 4.00. It's difficult to beat that. That is all volunteer work, so it might take a bit of time before we can admire some nice pictures. I'll report back once there are news to share. -Alex^Wblackbit [1] https://en.wikipedia.org/wiki/Printed_circuit_board [2] https://en.wikipedia.org/wiki/Integrated_circuit#/media/File:NXP_PCF8577C_LCD_driver_with_I%C2%B2C_(Colour_Corrected).jpg [3] https://en.wikipedia.org/wiki/Integrated_circuit#/media/File:Intel_8742_153056995.jpg
