Help with Flash memory reading

Yes, I think you are operating the flash interface correct now, both for read and write (exept for the missing 16'bz setting, I think).

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i expect that the Data hBDE7 was set at Adress 1 in de flash

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But actually nothing happens, as I already told you

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You can't write data to a flash memory by simply activating WE. Consult the flash datasheet at the DE2-70 system cd, you'll see that it's a rather complex action to write data to a flash. Basically it can be done in HDL code, but not in a few lines of code.

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This didn't mean the bus signals, it's about a complex command sequence.