s1giveio is used to manipulate the hardware directly. With enough patience and persistence I suppose you could read each of the pages of the flash out, but there are better tools for that: s1res v4.1 will be able to extract the 9.1 and 9.2 firmware only, while s1clone can make a complete copy of the flash --- I believe the former is more appropriate in your case.
Finding someone else with a BO-25002 and TGS177SH00 is a different matter altogether.
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I am no longer affiliated with Actions Semiconductor Co. Ltd. Do not ask me for firmware.
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