[J-core] We're not making ELC Europe.

D. Jeff Dionne jeff at SE-Instruments.com
Thu Oct 3 12:45:36 EDT 2019

On Oct 3, 2019, at 10:19, John Paul Adrian Glaubitz <glaubitz at physik.fu-berlin.de> wrote:

> Hi Rob!
> On 10/3/19 4:16 PM, Rob Landley wrote:
>> On 10/3/19 3:50 AM, wjones at wdj-consulting.com wrote:
>>>> LX45 is large enough for J32 (aka J4) MMU SMP, and probably UP J64.
>>> Will the LX25 be large enough for J4 single processor?
>> Single processor should fit, yes.
> Adding to this two quick questions:
> - Has there been any work on J4 yet?

Yes the cores are basically done, but not yet integrated.  It’s in the release queue.

> - Is the J4 fully source-compatible with the standard SH4 core?


> I'm asking because there is a lot of existing SH4-compatible open source software out there, in particular OpenBSD, NetBSD and Debian, of course ;).

There is for sure a kernel code that will need to change.  Slightly more than a new SoC port, but not a complete new ISA port.  We need to scope this problem, but the work is essentially funded (for the Linux kernel).


> Adrian
> -- 
> .''`.  John Paul Adrian Glaubitz
> : :' :  Debian Developer - glaubitz at debian.org
> `. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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