[Coco] Re: Coco Repack

[jdaggett at gate.net]

Frank

You are ringt if a FPGA version of the 6x09 were  incorporated 
along with an FPGA version of the GIME chip, breaking the 10 MHz 
barrier will be no problem. Speed control can be done with external 
clock ship. One by ICT can derive 1000's of frequencies from a 
single crystal frequency. In fact the one chip that I was looking at, 
from a 28.6868 MHz cyrstal I can derive over a 1000 different E 
and Q Clocks for the CPU from 400 KHz to 19 MHz. 

My initial intent was to use a 6309 and my new GIME chip and j ust 
see  how fast I can over clock the 6309. I have two bytes resevered 
in the memory map to address the clock PLL chip. 

Just keep pushing the clock until the chip stops. 

james



On 6 Aug 2004 at 3:11, farna at att.net wrote:

From:           	farna at att.net
To:             	coco at maltedmedia.com
Date sent:      	Fri, 06 Aug 2004 03:11:31 +0000
Subject:        	[Coco] Re: Coco Repack
Send reply to:  	CoCoList for Color Computer Enthusiasts 
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> Someone should be able to dig out a copy of Rainbow from around 88-90
> (stopped in 92 or 93, right?) and scan a copy of the TC-9 ad. IIRC it
> was a back plane design with multiple expansion boards. It was
> compatible with OS-9 only. There had been plans for DECB compatibility
> early on, but that feature never surfaced. There was a 68K expansion
> board for it though. All in all I think it a bit more complicated than
> the simple CoCo. If you want something faster or has more features,
> there are plenty computers out there. Of course the repack could be
> faster than the original, but if it were to be truly CoCo compatible
> it would have to have a hard or software "slow down" to at least ~2
> MHz to keep some programs happy (timing issues). Other than that I
> don't see why it shouldn't be run at 4-10 MHz if the FPGA supports it.
> A variable speed control of some sort would be a nice feature though.
> Maybe a hardware selectable crystal?? Would have to turn it off and
> reboot to select a differen
>  t speed that way, but would be nice for some projects. 
> 
> 
> --
> Frank Swygert 
> Publisher, "American Independent 
> Magazine" (AIM) 
> *Elite* publication for those 
> interested in all 
> aspects of AMC 
> history,performance,restoration,etc 
> . 
> (AMC,Rambler,Nash,Hudson,Jeep,etc.) 
> http:farna.home.att.net/AIM.html 
> (free download available!) 
> 
> 
> 
> -------------- Original message from coco-request at maltedmedia.com:
> -------------- 
> 
> > Message: 1 
> > Date: Thu, 05 Aug 2004 12:03 -0500 
> > From: Allen Huffman 
> > Subject: Re: [Coco] Re: Coco Repack 
> > To: "CoCoList for Color Computer Enthusiasts" 
> > Message-ID: 
> > 
> > Content-Type: text/plain; charset=us-ascii 
> > 
> > How about a return of the Tomcat TC-9? 
> > ___ 
> > Sent from my PalmOS cell phone. Please excuse the typos. 
> > 
> > Allen 
> > 
> > I h ave no idea of what the schematic or function of the TC9. Would
> > be interested if I could at least see a schematic or some
> > documentation of it. 
> > 
> > james 
> > 
> 
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