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boot ROM re: started on main() and the 0xe2c routine
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Mon, 15 Apr 2013 16:18:53 +0000
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children a445735685ba
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RAM layout:

800000 7 words:
	soft-vector pointers: by default the following 7 words at
	80001C are filled with ldr-jump instructions, which read
	from these 7 words and load them into PC
80001C 7 words:
	hard vectors: the physical vector locations in the ROM
	contain branch instructions to these 7 RAM addresses

800104: word initialized to 0x0001D4C0
800108: byte initialized to 0x01

800534: byte initialized to 0x00

8005C0: appears to be the intended low address (bottom) of the stack
80074C: top of the stack (initial value loaded into SP)