Subject: Re: [stella] Thomas Jentzsch's PAL -> NTSC Conversions From: Thomas Jentzsch <tjentzsch@xxxxxx> Date: Thu, 7 Feb 2002 21:54:55 +0100 |
At 07.02.2002, 18:41, Eckhard Stolberg wrote: > I've said it before, and I'll say it again. A game need to do > three complete uninterrupted lines of VSYNC to work properly > on all TVs. Some games try to use this time to do some other > setup work (Solaris and Desert Falcon are known offenders in > this respect) and this seems to to cause problems on some TVs. I've had a short look at Gas Hog. It does 5 lines of VSYNC and the only TIA registers it writes to are AUDx1. Here is some code: ldx #$2a sta WSYNC stx VBLANK stx VSYNC stx TIM8T ... Lf0a6: lda INTIM bne Lf0a6 sta WSYNC sta VSYNC That look's ok for me too. What do you mean exactly with uninterrupted? I'm doing some stuff (SWCHB, RESxy, HMMxy, NUSIZx, VDELPx) during VSYNC in Thrust and Jammed too and nobody reported any sync problems yet. Have fun! Thomas _______________________________________________________ Thomas Jentzsch | *** Every bit is sacred ! *** tjentzsch at web dot de | ---------------------------------------------------------------------------------------------- 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] Thomas Jentzsch's PAL , Chris Wilkson | Thread | Re: [stella] Thomas Jentzsch's PAL , Eckhard Stolberg |
Re: [stella] Thomas Jentzsch's PAL , Chris Wilkson | Date | [stella] 7800 Incompatibility, Paul Slocum |
Month |