[Coco] Update on new Coco 3 game engine

[Richard Goedeken]

On 08/16/2013 08:59 AM, John Kowalski wrote:
> There are two things you can do:
> A) In the 60hz IRQ, set up and enable the timer to trigger FIRQs.  In
> the FIRQ, advance a counter.  In the next 60hz IRQ, disable the
> timer/FIRQ again and check how many times the counter advanced.  The
> count will be different from both '86 and '87 GIME ('87 will give a
> higher count value than '86)
>
> B) Use the 279.365 nsec source clock for the timer instead of the
> 63.695 usec source clock.  The timer frequency will still be off by
> one count depending on GIME, but since you have to set the countdown
> to a high value to set your sample rate, the audible difference
> between the two will be imperceptible.


By the way John, I'm a big fan of your Donkey Kong port.  I think this is the 
single most impressive piece of software for the Coco.  I'm not all that great 
at DK but one of my colleagues at work is pretty good.  Unfortunately MESS 
doesn't emulate the joystick input quite right, so some day I'll have to bring 
in my Coco 3 and see if he can make it to the 'pie level' on the Coco.

Richard