chdk in the DIGIC6 world - page 17 - General Discussion and Assistance - CHDK Forum
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chdk in the DIGIC6 world

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Offline srsa_4c

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Re: DIGIC 4
« Reply #160 on: 17 / June / 2019, 19:12:23 »
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It seems to have a data(?) RAM area above 0xc0270000, length 0x2000. There is 'life' in it around offset 0x1900 (on ixus150), bytes are changing. There is no Xtensa code there.
GetISFirmVersion gets its data from reading around 0xc0271900...
Quote
It's also possible that this MechaCPU is not Xtensa, it's just fed from the same ROM blob that has Xtensa code.
Wrong. Xtensa firmware is copied to RAM (from 0x60e000, size 0x80d8 bytes), in task_MechaCPUTransfer.

 

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