Subject: [stella] Trick to avoid black line on screen after HMOVE ?|
Date: Tue, 18 Mar 1997 16:28:18 +0100
There is always a short black line at left of screen after HMOVE (when not done in Vertical Blank) following a WSYNC. Some games like HERO, Decathlon and Enduro just 'skipped' the first two bits of PF0, so it is not visible any more. But they used the last two bits of the screen (on right side), so PF0 must be updated twice every scanline, right ? (Quite a lot of cycles wasted just to avoid this problem). I want to use this trick, too. The thing is that PC Atari does seem to have problems with this type of code so I cannot test my program properly. Anyone with a solution to this problem ? I could skip the last two bits as well, so I do not waste time by updating PF0 all the time, but this reduces the size of the display too much. thanks, Marc. -- Archives available at http://www.biglist.com/lists/stella/archives/ E-mail UNSUBSCRIBE in the body to stella-request@xxxxxxxxxxx to be removed.