[Coco] assembly questions?

[jdaggett at gate.net]

Kevin

John Kent has a functional Core that is called a SoC, System on a 
Chip. He has the 6809 CPU core and built around it is a  UART, a 
simple MMU, and timer and few other items. It is designed to boot 
the Flex (Flex09) operating system. It fits comfortablity in a Spartan 
II 300K gate part. The CPU core itself will fit just into a 200K gate 
Spartan II. 

The Spartan II would be more prefered as its inputs and outputs are 
5 volt tolerant. The Sparttan IIE and Spartan III are not unless there 
is an external pullup. 

I was more hoping for a smaller core so that maybe much of the 
GIME functions and the CPU functions could be done in one chip. 
Looking at the Spartan 3 family, a 400K or 600K gate could almost 
do the whole Coco on one chip plus external ram/rom. 

james
 

On 24 Jul 2004 at 18:15, Kevin Diggs wrote:

Date sent:      	Sat, 24 Jul 2004 18:15:15 -0700
From:           	Kevin Diggs <kevdig at hypersurf.com>
To:             	CoCoList for Color Computer Enthusiasts 
<coco at maltedmedia.com>
Subject:        	Re: [Coco] assembly questions?
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> Hi,
> 
>  Most of the assembly I have "played" around with has been
> x86. I have also played with 68k and ... looked at PPC.
> 
>  I have no VHDL training. But I do have a EE degree. When
> reading the 6809 newsgroup (I think that is where I read it), I
> came across articles describing a reimplementation of the 6809. I
> think this was for Xilinx or Lattice or (wasn't there one of these
> that began with an A?).
> 
>      kevin
> 
> Mark Marlette wrote:
> > 
> > At 11:38 AM 7/23/2004 -0700, you wrote:
> > 
> > Kevin,
> > 
> > Lack of registers? What are use to programming on?
> > 
> > Do you have VHDL training or experience? If so where?
> > 
> > Curious.
> > 
> > Regards,
> > 
> > Mark
> > Cloud-9
> >
> 
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