Subject: Re: [stella] Turbo? From: "Thomas Jentzsch" <tjentzsch@xxxxxx> Date: Wed, 2 Apr 2003 12:14:59 +0200 |
Christopher wrote: > Manuel wrote: > >The background color changes must happen _timed_ and on > >_every_ scanline, so a real repositioning scanline can't > >be executed. > >... > Looking at the screen shot - The bottom two cars (red and green) are P0/P1, the other cars (blue and white) however could be M0/M1/Ball. So presumably cars in the distance are M0/M1/Ball and only when they become close enough to show detail they become P1/P0. > ... I think I owe you some explaination. :-) Since it was never planned to let the cars move horizontaly the code is very simple: - all computer cars are P1, the players car is P0 (no missiles or balls) - the positioning is simply done by using RESPx (no HMOVE inside the kernel at all) - the colors are NTSC, but the ROM is recognized by z26 as PAL (282 scanlines), this was done intentional just to confuse you. :-) - the car "accelerates" with joystick right (which also is the firebutton of paddle 0 ;-). But there is no real paddle code inside the kernel. Last not least, the gaps of the ROM are filled with the matching code of Smurfs - Rescue in Gargamel's Castle and the second 4K are identical with the 2nd bank of Smurfs. All TV screenshots had to be made with a NTSC TV (thanks go to CPUWIZ), so I made a second ROM with "wrong" colors. Have?fun! Thomas _______________________________________________________ Thomas?Jentzsch?????????|?***?Every?bit?is?sacred?!?*** tjentzsch?at?web?dot?de?| ______________________________________________________________________________ Werden Sie kreativ! Bei WEB.DE FreeMail heisst es jetzt nicht nur schreiben, sondern auch gestalten. http://freemail.web.de/features/?mc=021142 ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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