On Thursday, 25 January 2018 at 04:45:34 UTC, Walter Bright wrote:

This implies a ROM must be located there. Else how do initial values get there?

I'm not sure what you mean. When you upload your firmware to the MCU, it writes the initial stack pointer to address 0x00 and the address of the reset handler to 0x04. It is up the developer to set these values properly in the linker script (a.k.a scatter file).

Mike

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