Subject: Re: [stella] Supercharger screens... From: "John Saeger" <john@xxxxxxxxxxx> Date: Fri, 15 Jan 1999 12:09:27 -0800 |
-----Original Message----- From: Eckhard Stolberg <Eckhard_Stolberg@xxxxxxxxxxxxxxxxxxxxx> >At 19:13 14.01.99 -0800, you wrote: > >>Mostly, a classic VCS with a Rev-9 board. How about you? (I'm really >>hoping it's an Atari JR, that would explain a lot...) > >I'm mostly using a 'big rainbow' Jr. and that one gives me only two >sprites. But I also tried it on a 6-switch model with a Rev-B board. >(The main board is (C)78, the board for the switches is (C)77.) This >one also gives me only two sprites. Maybe it's a change Atari did >when they had to modify the TIA for PAL and later when they tried to >cut down costs for the JR. How does your JR handle your trick18 >program and your 'not stable' program? Well, the JR only shows 17 sprites in Trick18, and the unstable sprites don't show up. I wonder why I didn't try this sooner... >p.s. Nice work on all those tables and diagrams, John! Now you only >need to try out the wrapping sprites and HBLANK problem and Bradford >can update his emulator. ;-) You did at least as much of the work as I did! And I couldn't have done anything without a template to work from. :-) As far as wrapping sprites go, there is some data on that in what I posted yesterday. They mostly seem to work just like a regular sprite. I took another look at unstable.bin and it looks like the unstable sprite is a sprite marked cccccccc in the (d-1) spacing. Apparently a wrapped sprite is a little *stronger* than a regular sprite in this case causing the other sprite to be unstable. But since it doesn't show up on the JR at all, I think an emu author can probably show it or not show it as they please. Other than that, I think a sprite is a sprite. Doesn't matter where it came from. Boy, we've certainly beat this one to death haven't we? So what do you think Brad? Does it look pretty easy? ;-) John -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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