Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: George_Bain@bc.sympatico.ca (George Bain)
Newsgroups: scee.yaroze.programming.2d_graphics
Subject: Re: Kernal Management
Date: 28 May 1997 18:53:05 GMT
Organization: SCEA Net Yaroze News
Lines: 85
Message-ID: <5mhuuh$shk9@scea>
References: <5m10as$shk2@scea> <3384144A.234B@interactive.sony.com>
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In article <3384144A.234B@interactive.sony.com>, 
dev_support@interactive.sony.com says...
>
>George Bain wrote:
>> 
>> I need help with system timer on PlayStation.  Does anyone know
>> the equalivant of this code on PSX?  I know I have to use
>> GetRCnt(),StartRCnt(), etc but what is the argument for the root counter
>> spec..and what is RCntCNT2 macros?? Lib book is not giving me enough info.
>> Any advice would help..thanx
>> 
>> Latah.....
>> 
>> George Bain
>> 
>> ************ CODE SNIP E.G ******************
>> 
>> #include <stdio.h>
>> #include <stdlib.h>
>> #include <conio.h>
>> 
>> #define TICKS       (*(volatile unsigned long far *)(0x0040006Clu))
>> 
>> /* ---------------------- get_tick() ------------------ February 11,1997 */
>> unsigned long get_tick(void)
>> {
>>    return TICKS;
>> }
>> 
>> /* ---------------------- main() ---------------------- February 11,1997 */
>> void main(void)
>> {
>>         unsigned long t2;
>> 
>>    printf("starting\n");
>>         t2=TICKS + 40;
>>    while ( !kbhit() )
>>                 {
>>       if ( get_tick() == t2 )
>>                         {
>>                         printf("An important event accoured\n");
>>                         t2=TICKS + 40;
>>                         }
>> 
>>       }
>>         getch();
>> 
>>         printf("done\n");
>> }
>> 
>> /* ------------------------------ EOF -------------------------------- */
>
>There are 3 root counters, 0, 1, and 2. The return values are 0-65535,
>root counter 1 is slowest. As theres no information on which root
>counter measures what, so we don't know the timings, so it'll have to be
>trial and error (1 maybe hsyncs).
>
>As for the code, something like this should do the trick.
>
>void main(void)
>{
>  printf("starting\n");
>  StartRCnt(1);        // not needed on Yaroze
>  ResetRCnt(1);
>
>  while(!kbhit())
>    {
>    if (GetRCnt(1) == 40)
>      {
>      printf("event\n");
>      ResetRCnt(1);
>      }
>    }
>  getch();
>  printf("done\n");
>}


YES! this is all I need!!!

Latah...


George Bain