Author Topic: FX9860GII (sd card upgrade?)  (Read 108 times)

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Offline appswert

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FX9860GII (sd card upgrade?)
« on: July 07, 2017, 03:46:59 pm »
Hello guys,

whilst dissasembling my casio fx9860gii (sh3 version, non sd) I stumbeled upon some unused pins on the side of the pcb. Afer a little online reasearch if found pictures of the sd version at:
https://tiplanet.org/forum/viewtopic.php?p=146411
(I'm not the author of any content on this site!)

Cheap SD-breakout-boards are available online, so I'm planning to add one of these to the calc.
I tried to find out which pin of the sd card slot goes where but based on the pictures I was unable to figure out how the traces are underneath the sd-slot.
Another problem is that on the photos there are smd-resistor arrays (slim 8pin smd devices) and at least the ones on the original calc pcb have different values (10ohms vs 20ohms) and I can't figure out what the value is for the ones on the SD-breakout-board

Does anybody has an pinout for those connectors or can meassure the resistance across the resistor arrays?
Is there a need to modify the firmware?

Thank you for your answers  ;)
Greetings appswert
« Last Edit: July 10, 2017, 02:10:57 pm by appswert »