Subject: Re: [stella] VDEL... From: Manuel Polik <cybergoth@xxxxxxxx> Date: Fri, 22 Feb 2002 20:00:51 +0100 |
Hi Eckhard! >>Now, could that work, or would that >>display rubbish every other line? >I fear it won't work :-) Hey! :-) >>VDEL must be the most useless thing ever put inside a >>chip... :-) >It won't work. The random data would eventually get copied >into the GRP registers that are used for display, so it would >show up in every other scanline. Too bad... >And VDEL is quite useful, if you want to do simple games >like Combat, which is what the VCS was designed for. Uhm... there is something done in Combat with VDEL you can't do quicker & shorter without?!? >Also >it enables us to do the six digit score routine, which is >one of the most useful things for just about any VCS game. ;-) Again uhm... ;-) Set aside all loads, what would prevent you from doing STA GRP0 STA GRP1 ... STA GRP0 STX GRP1 STY GRP0 TSX STX GRP1 without VDEL?!? Actually, if done without VDEL, you save bytes & cycles both in- and outside the kernel... - Just imagine what cool stuff could've been done if VDEL would delay any GRPX write exactly until the next line! Greetings, Manuel ---------------------------------------------------------------------------------------------- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/
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