Also worth noting you should just use require("Flash").read(1,0x60400000) and not require("Flash").read(1,'0x60400000') - so you don't need the quotes.
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Also worth noting you should just use
require("Flash").read(1,0x60400000)
and notrequire("Flash").read(1,'0x60400000')
- so you don't need the quotes.