[Coco] Clock "Timing".

[John Lochey]

Hi Dave,
Whew!  I hope to go in that direction, but for now Machine code is on the back burner, but that does seem like the way to get super accurate.
Thanks,

Johnny


      From: Dave Philipsen <dave at davebiz.com>
 To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Tuesday, April 4, 2017 2:59 PM
 Subject: Re: [Coco] Clock "Timing".
   
You would probably get a more accurate timebase by using an interrupt 
routine which would be derived from timing based upon the crystal 
frequency.  Even with that you would probably want a way to trim it for 
accuracy.  It can all be done from an Extended BASIC command set however 
a knowledge of machine code would be essential.

Dave


On 4/4/2017 1:50 PM, John Lochey via Coco wrote:
> Hi all,
> I'm making a binary clock for the CoCo2 via emulation (XRoar at the moment).
>
> As far as I know (from reading "Getting Started...Color Basic"), the way to time an actual second of time on a Color Computer 2 is to use a For...Next loop that corresponds as closely to an "actual" second as possible.
> Is there a better way using just the Extended BASIC command set?
> Also, provided that the emulator has the same settings as the original CoCo2, will the same timing loop work via emulation and hardware?
>
> Or am I a dreamer!  ;)
>
> Johnny
>
>


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