Subject: Re: [stella] 3E + interlace woes From: "B. Watson" <atari@xxxxxxxxxxxxxx> Date: Fri, 8 Jul 2005 15:46:29 -0400 |
On Fri, 8 Jul 2005, Eckhard Stolberg wrote: > I think Andrew posted a couple more notBD binaries in the AtariAge > forums but that's about it. No-one besides him is currently using > this bankswitching format, and I'm not sure if Armin ever wrote > a test binary for himself when he designed the Kroko Cart. He did, and he sent it to me along with the source. It works, though I had to reassemble it with TIA_BASE_ADDRESS set to $40: with 3E bankswitching, it's perfectly OK to access the TIA at $00-$2C, because unlike 3F, this doesn't trigger a bankswitch. However, Stella doesn't handle this yet (writes to $00-$3D are just ignored in 3E mode), so his test binary didn't work as originally assembled. I'll fix this in Stella tonight. So Alpha 4 will officially support 3E. It still may not be perfectly emulated, but until more people write 3E games, it's sorta hard to tell. > z26 supports interlacing only in those video modes that have every > other scanline blank to simulate a TV display (modes 3, 4 and 5). > In these modes we just display the first VCS frame in the odd lines > and the second frame in the even lines to simulate the higher > resolution with interlacing. Ahh, OK, that makes more sense. Maybe z26 should spit out an error message if -! is given with a video mode that doesn't support it? The manual actually does say it only works with modes 3-5, once I knew I was looking for it... of course that'd be my fault, since I (re)wrote that manual myself :) -- B. Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
Current Thread |
---|
|
<- Previous | Index | Next -> |
---|---|---|
Re: [stella] 3E + interlace woes, Eckhard Stolberg | Thread | [stella] BASIC functions - ADR(), Glenn Saunders |
Re: [stella] 3E + interlace woes, Eckhard Stolberg | Date | RE: [stella] Atari 2600 BASIC compi, Glenn Saunders |
Month |