Subject: Re: [stella] VSYNC in 9 bytes From: Chris Wilkson <ecwilkso@xxxxxxx> Date: Thu, 2 Sep 2004 19:13:23 -0400 (EDT) |
Very clever. I like it! -Chris On Fri, 3 Sep 2004, Edwin Blink wrote: > I've been bytebusting a lot in keeping my menu I'm doing as(mall)ap and > just had one of those bright moments. Just needed to share this with you > guys: > > ;generates vertical sync pulse for 3 full scanlines. > ;VBLANK should be set by the overscan code and is not set here > > LDA #$0E ;each '1' bits generate a VSYNC ON line (bits 1..3) > VSLP1 STA WSYNC ;1st '0' bit resets Vsync, 2nd '0' bit exit loop > STA VSYNC > LSR > BNE VSLP1 ;branch until VYSNC has been reset > > > > > Archives (includes files) at http://www.biglist.com/lists/stella/archives/ > Unsub & more at http://stella.biglist.com > --+---------------------------------------------------------------- > You are subscribed as: ecwilkso@xxxxxxx > To unsubscribe, send email to: > stella-unsub-23158@xxxxxxxxxxxxxxxxxx > Or go to: > http://stella.biglist.com/unsub/stella/ecwilkso@xxxxxxx > --+-- > >
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