[Coco] Speed question

[jdaggett at gate.net]

Derek

John does not use a quadrature clock but does use both rising and falling 
edge of a single clock. This does make his CPU 09 a bit  more efficient than 
the original. The only problem that will have is where certain software  has 
timing loops. Those will be off. 

james

On 17 Aug 2007 at 22:43, Becker, Gary wrote:

> Thanks Derek
> 
> I was hoping that the standard CoCo would take longer. I was told by
> the guy who wrote the 6809 code, that it was more efficient than the
> real CPU. Using your number for the standard, I have added a effective
> CPU speed.
> 
> Real                  Effective
> CoCo 0.89      = 0.89 MHz
> FPGA 0.89     = 1.06 MHz
> FPGA 1.79     = 2.11 MHz
> FPGA 4.167   = 5.05 MHz
> FPGA 12.5     = 14.88 MHz
> FPGA 25       = 22.72 MHz
> 
> This test is not very scientific, but close enough.
> 
> Gary
> 
> ________________________________
> 
> From: coco-bounces at maltedmedia.com on behalf of Derek
> Sent: Fri 8/17/2007 7:48 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Speed question
> 
> 
> 
> I got 3 Minutes 24.2 Seconds when run on a stock CoCo 3 w/ 128K Ram
> 
> 
> 
> "Becker, Gary" <Gary.Becker at amd.com> wrote:
> I am trying to gauge the speed of the CoCo3FPGA with a real CoCo3. I
> am running a simple BASIC program.
> 
> 10 FOR A=0 TO 10000
> 20 PRINT A
> 30 NEXT A
> 
> Can someone with a real CoCo type in this simple program, time how
> long it takes, and send me back the results? I would like to see 6809
> and 6309 runs. It can be run at either the standard speed or the fast
> speed, since it scales nicely. Here is a list of the ones that I have
> taken.
> 
> 0.89 MHz 172 sec.
> 1.79 MHz 86 sec
> 4.167 MHz 36 sec
> 12.5 MHz 25 sec
> 25 MHz 8 sec  (really 21.875 MHz)
> 
> 
> Thanks
> 
> Gary
> 
> 
> 
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