Subject: RE: [stella] VBLANK or VSYNC first? From: ben <ben@xxxxxxxx> Date: Sun, 28 Oct 2001 18:36:05 +1100 |
At 08:08 AM 10/23/1993 -0300, you wrote: >I´m not sure if I understood what you want to do here, but the only way to >start a new frame is using vsync, the beam won´t reposition by itself no >matter how many scanlines have passed. So when VSYNC is turned off you >should restart the scanline counter, but not the beam counter. Also, I think >you should activate TIA_vblank while VSYNC is on ( I would like a >confirmation on this subject). 1. The docs all show VSYNC as the top of the frame (3 lines) and then 37 lines for VBLANK. So isnt the scanline counter reset when VSYNC is written to, not when it is turned off? Doing it as you suggest would be 3 lines too late, yes? 2. What is the beam counter actually used for? Only for reference? If I understand it, RSYNC controls this, but RSYNC seems hardly ever used :/ cheers Ben - Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
RE: [stella] VBLANK or VSYNC first?, ben | Thread | RE: [stella] VBLANK or VSYNC first?, Chris Wilkson |
[stella] CMP Wizard, Glenn Saunders | Date | RE: [stella] VBLANK or VSYNC first?, Chris Wilkson |
Month |