Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: Jack Copper <impmeister@earthlink.net>
Newsgroups: scea.yaroze.programming.2d_graphics,scee.yaroze.programming.2d_graphics
Subject: Re: Scrolling without BG ??
Date: Wed, 28 May 1997 21:43:24 -0400
Organization: ArcanaTech
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Developer Support wrote:
> 
> George Bain wrote:
>
> SNIP SNIP
>
> To use the root counters just call StartRCnt with the number you want.
> ResetRCnt as necessary and GetRCnt to get a value. The value returned is
> in the range 0-65535, after which the counters wrap around.
> 
> Example
> 
> #include <libps.h>
> 
> void main()
>    {
>    unsigned long counter;
> 
>    counter = 0;   // could also be 1 or 2
> 
>    StartRCnt(counter);
> 
>    while(*program terminate condition*)
>       {
>       ResetRCnt(counter);
> 
>       *all the code*
> 
>       printf("Time taken: %d\n",GetRCnt(counter));
>       }
>    }
> 
> Stuart

How does this square with the (less than enlightening) comments on page
90 in the User Guide? There is an RCntCNT2 MACRO in the libps.h header:

#define RCntCNT 0xf2000002

but no RCntMdNOINTR | (or?) RCntMdSP

In any case (also from pg 90) it appears that the counters increment
every 8 cycles of the System clock (approx every 24 microseconds).

HOWEVER, all these caveats are, at the least, frustrating.. How about
some definitive information..

Thanks.
Jack Copper