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Groups > comp.sys.apple2.programmer > #5600

Re: //c VBL Polling

Newsgroups comp.sys.apple2.programmer
Date 2020-06-17 12:14 -0700
References <5d7c2bc4-7f5d-4625-a634-09a2a116b47fo@googlegroups.com> <72889e41-4c08-400d-9e13-d6669407973ao@googlegroups.com> <ba576796-3fc8-4fda-81e4-83872c85c0a1o@googlegroups.com>
Message-ID <e13f003e-d4ec-49e9-b105-e5ffa7a50da3o@googlegroups.com> (permalink)
Subject Re: //c VBL Polling
From qkumba <peter.ferrie@gmail.com>

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>         bit     $C070
> 1:      bit     $C019
>         bpl     1
>         rts
> 
> ...the idea is: "When I come too late for the begin of the VBL, then wait for the next one to make sure to have a full VBL cycle ahead of me on return."

I understand.  That's better.  I will change TR.

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Thread

//c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-15 12:00 -0700
  Re: //c VBL Polling qkumba <peter.ferrie@gmail.com> - 2020-06-15 15:21 -0700
    Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-16 00:27 -0700
  Re: //c VBL Polling qkumba <peter.ferrie@gmail.com> - 2020-06-15 15:34 -0700
    Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-16 00:43 -0700
      Re: //c VBL Polling qkumba <peter.ferrie@gmail.com> - 2020-06-17 12:14 -0700
        Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-17 15:21 -0700
          Re: //c VBL Polling qkumba <peter.ferrie@gmail.com> - 2020-06-18 21:55 -0700
  Re: //c VBL Polling remy gibert <remy.gibert@free.fr> - 2020-06-16 04:14 -0700
  Re: //c VBL Polling remy gibert <remy.gibert@free.fr> - 2020-06-16 04:16 -0700
    Re: //c VBL Polling Antoine Vignau <ntn.vignau@gmail.com> - 2020-06-16 12:17 -0700
      Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-16 14:21 -0700
        Re: //c VBL Polling Antoine Vignau <ntn.vignau@gmail.com> - 2020-06-16 15:20 -0700
          Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-16 15:59 -0700
        Re: //c VBL Polling Oliver Schmidt <ol.sc@web.de> - 2020-06-16 15:35 -0700
          Re: //c VBL Polling cybernesto <cybernesto@gmail.com> - 2020-07-21 08:55 -0700
            Re: //c VBL Polling qkumba <peter.ferrie@gmail.com> - 2020-07-21 13:28 -0700
              Re: //c VBL Polling cybernesto <cybernesto@gmail.com> - 2020-07-22 04:09 -0700
  Re: //c VBL Polling Brian Patrie <bpatrie@bellsouth.spamisicky.net> - 2020-06-16 20:16 -0500

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