[J-core] qemu updates / roadmap

[Rich Felker]

On Tue, May 17, 2016 at 05:53:56PM -0400, Christopher Friedt wrote:
> On May 17, 2016 5:49 PM, "Rich Felker" <dalias at libc.org> wrote:
> >
> > 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.
> 
> Sure - what is the actual memory map for the J2 on e.g. the Mimas V2? So
> far I've only been able to piece it together from fragments. I guess I
> should probably check the vhdl 8-/

See Rob's previous post to this list:

http://lists.j-core.org/pipermail/j-core/2016-April/000038.html

I think the SRAM part is larger than he stated though; check the VHDL
or just use the boot loader linker script as a guide for now.

Rich