archive.worldofdragon.org

Hey Rob

it works in ANY SG MODE (and hires etc etc)

it's actually mismatched timing on mode switches so instead of 57 cycles per line, do something like 59, the computer will even out the differences for you.....

/Simon

Hey guys... i finally pulled and programmed an idea i have had in my head for a long time: how to artifact on PAL to provide extra colors (sorry guys no NTSC)... this trick relies on the way PAL works... what PAL does is average the color on 2 consecutive scanlines.... so what happens if we do this:...

OK guys, this time i actually shifted alternate lines in SG by 1/2 a char....

here are some results so far







/Simon

check if xroar is configured for PAL or NTSC !

SPEED IS NOT ABOUT NICE LOOKING CODE !

/Simon

I played this on my real mc10 this afternoon !!!!!

VERY COOL !

/Simon

Hey there,

looks pretty good....

you can do away with your cmpa #0's you know ?

/Simon

post the code you are using to set the mode..... the coco can do some wierd stuff with mode mismatch..... are you using something like this: lda #$f0 sta $ff22 (vdg) sta $ffc3 (sam) sta £ffc5 (sam) if you hit $ffc1 it will display strangely (DMA mode if c1/c3/c5 are set) /Simon :-)

NICE !

so, how many voices do we have....

HOW are we emulating 2*8 BIT DAC's out of 1*6 BIT DAC ?

i'm supposing this eats pretty much all cpu time too ??

/Simon

@stew...

would that be the actual arkanoid tune or the ocean loader tune ??

/Simon

@stig... at the end of the day the c64 was an awesome machine.. (still is).... but the dragon / coco were very undersung... hence the demo fury from my part.... (along with utz making awasome tunes for what ever strange stuff we cook)... heck... no one thought we would ever cook a musical tapeloader...