[Coco] Speed up and slow down POKE

[Larry Osborne]

----- Original Message ----- 
From: "Robert Gault" <robert.gault at worldnet.att.net>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Monday, August 02, 2004 8:36 PM
Subject: Re: [Coco] Speed up and slow down POKE


> Larry Osborne wrote:
> > ----- Original Message ----- 
> > From: "Mannequin*" <mannslists at invigorated.org>
> > To: "cocomedia" <coco at maltedmedia.com>
> > Sent: Monday, August 02, 2004 6:44 PM
> > Subject: [Coco] Speed up and slow down POKE
> >
> >
> >
> >>Could someone remind me if I have the speed up and slow down POKE right
> >>for the Coco 3?
> >>
> >>Speed up:  POKE 65497,0
> >>Slow down: POKE 65495,0
> >>
> >>I think the speed up is right, but I don't think if I have the slow down
> >>one correct.
> >>
> >>Thanks.
> >>-M.
> >>
> >>-- 
> >>Coco mailing list
> >>Coco at maltedmedia.com
> >>http://five.pairlist.net/mailman/listinfo/coco
> >>
> >
> >
> > As my memory goes
> >
> > Whole memory (always works on a CoCo 3 - may fail on a CoCo 1 or CoCo 2)
> >     Speed up (double speed) POKE 65467, any digit
> >     Slow down (normal speed) POKE 65496, any digit
> >
> > Half Memory (RAM double speed -bottom half of memory; ROM normal
speed -top
> > half of memory)  ( Works on all CoCo's but of limited use on a CoCo 3)
> >     Speed up (double speed) POKE 65495, any digit
> >     Slow down (normal speed) POKE 65496, any digit
> >
> > 0 was the normal digit used but the digit had no real effect, rather it
was
> > the POKEing the location that had the effect.
> >
> > I hope this helps.
> >
> > Larry Osborne
> >
> >
> >
>
> The full fast poke will work on any Coco but you will lose video output
> when at fast speed on a Coco1. I've written several programs which use
> this poke and video returns when you drop back to normal clock speed.

True but the loss of video on the 1 likely or 2 less likey but still
possible I always regarded as a failure and on the very earliest boards of
the CoCo 1 you could get other problems especially corruption of some RAM
although that would take a while.  I didn't like to leave a programme
running at full double speed and have the video go crazy.  This was never a
problem on a 3

Incidently I just resent my original message with the necessary corrections
in the locations.

Larry
>
>
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