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Discussion Groups | FPGA-CPU | Re: Digest Number 782
This list is for discussion of the design and implementation of field-programmable gate array based processors and integrated systems. It is also for discussion and community support of the XSOC Project (see http://www.fpgacpu.org/xsoc).
Re: Digest Number 782 - Tony - Sep 29 16:12:00 2005
I must have missed the start of your project, what CPU core are you using?
Sounds good ..
On Thursday 29 September 2005 12:25 pm, fpga-cpu@fpga... wrote:
> There is 1 message in this issue.
>
> Topics in this digest:
>
> 1. it breathes - milestone
> From: "Rob Finch" <robfinch@robf... > ________________________________________________________________________
> ________________________________________________________________________
>
> Message: 1
> Date: Thu, 29 Sep 2005 12:15:52 -0000
> From: "Rob Finch" <robfinch@robf...>
> Subject: it breathes - milestone
>
> Dual cpu system...
>
> Got it working I think.
>
> One cpu is constantly updating some characters on the screen, while
> the other is running downloads and stuff. The "fun" part was getting
> the shared memory controller to work properly. It uses a combination
> of priority and random selection for arbitration. Dual port rams are
> being used so that both cpu's can execute code at the same time. It's
> very tempting to make a quad/octa cpu version. (I can see it now...
> an
> eight cpu version running at effectively 320 MHz total....- each cpu
> running at 40MHz)
>
> The cores have a cpu number in a special register of the cpu, so the
> cpus can run different code based on it's number.
>
> Rob > ________________________________________________________________________
> ________________________________________________________________________ > To post a message, send it to: fpga-cpu@fpga...
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Re: Digest Number 782 - Rob Finch - Sep 30 0:15:00 2005
--- In fpga-cpu@fpga..., Tony <tony@i...> wrote:
>
> I must have missed the start of your project, what CPU core are you
using?
>
> Sounds good .. I'm using a home grown core call the 'Butterfly'. It's a simple 32-bit
RISC processor that superficially looks similar to the gr004x. The
instruction set looks very similar (don't they all?), but the guts are
completely different. I may post it at opencores sometime. Problem is,
I don't have a good toolchain for it.
(You need to be a member of fpga-cpu -- send a blank email to fpga-cpu-subscribe@yahoogroups.com )
>
> I must have missed the start of your project, what CPU core are you
using?
>
> Sounds good .. I'm using a home grown core call the 'Butterfly'. It's a simple 32-bit
RISC processor that superficially looks similar to the gr004x. The
instruction set looks very similar (don't they all?), but the guts are
completely different. I may post it at opencores sometime. Problem is,
I don't have a good toolchain for it.
(You need to be a member of fpga-cpu -- send a blank email to fpga-cpu-subscribe@yahoogroups.com )