I may have an UNO board with a bad chip. I can upload sketch with a compiled size up to 28k just fine (28672 bytes). Anything above that the upload fails. Binary sketch size: 30092 bytes (of a 32256 byte maximum) avrdude: stk500_paged_write(): (a) protocol error, expect=0x14, resp=0x64 avrdude: s…

is sketch loaded at address 0 or at high address on UNO?

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