Subject: Re: [stella] Try this demo, please. From: kurt.woloch@xxxxxxxxx Date: Thu, 30 Mar 2000 12:14:35 +0200 |
>>At 14.19 19/03/00 -0800, you wrote: >>It has to be something like that. I tried it on PCAE, but on a real 2600 >>the effect might be even worse. >>You'll have to count all those cycles again.. and be very careful if you do >>some conditional jump inside the kernel. > >Do you know if any games purposefully use "bad cycle counting" to generate >interesting erratic effects on the 2600? Doesn't the cosmic ark stars >thing have to do with that? And the extra digit on Commie Mutants has to >do with generating a clone at the end of a scanline that actually generates >the sprite on the next? Plus Video Chess that just generates colors on a >rolling screen (to save time for game calculation) which looks fine other >than that the color changes produce a tear at arbitrary point on the screen. > >Also, doesn't Robot Tank do something like create a glitchy kernel >intentionally when you get hit in order to generate a tearing and rolling >display with diagonal lines? > >I'm interested in knowing whether this sort of thing could be used as a >feature... Well... I remember when writing the "Jim's heart will go on" demo two years ago (didn't have time for more yet... sorry...), someone complained that when uncommenting a write to the outer playfield register (outer in this case, because the PF's reflected), the additional time causes the playfield to be updated at mid-scanline... I thought of leaving this in intentionally... because why should a sinking ship be absolutely straight horizontally? I also thought of intentionally updating PF0, PF1 and PF2 in CONSECUTIVE scanline, giving the effect of the ship being "bent down" a little in the middle... ;-) With love from Austria (and many bends to make) Kurt Woloch -- 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] Try this demo, please., Pete Holland | Thread | Re: [stella] Try this demo, please., Scott Huggins |
Re: [stella] Try this demo, please., Piero Cavina | Date | Re: [stella] Try this demo, please., Eckhard Stolberg |
Month |