[J-core] qemu updates / roadmap

[Rich Felker]

On Tue, May 17, 2016 at 05:46:20PM -0400, Christopher Friedt wrote:
> As it turns out, the reason that the variable was being read back as 0
> was due to the linker script (boot/linker/sh32.x) not having the
> correct location for ram0 (it turned out to be in a completely
> unmapped section of memory - i.e. not in rom and not in sdram @
> 0x10000000).

That's intentional; the address it's using is in SRAM, not DRAM. For
emulating J2, qemu should map that range with writable memory.

Rich