Streetfighter 2 conversion for MSX

1 chunk per line ? do your characters have arms, hands and attachments ? Don't forget the shoryuken fire and other special FX's. also when blanka electrifies it could be very bad for the chunk technique.

I counted 1.5 chunks per line on the standard pose.
In diagonal pose pics, cpu will say "thank you" about all those transparent pixels to skip.

Do you have a pic of being eletrified? Make it a solid cloud, 1 chunk per line

like this one:

Please can one make those sparcles go horizontal :P

hmm...

why don't use Carchano's ADVRAM in this game for MSX?
well... i don't know if any emulators actually emulate this feature.

anyway, remember Street Fighter Zero/Alpha 2 in the super famicom,
it loads everytime before and after every fight.

this could be the first game to use ADVRAM as a bed test and other
games could follow it.

if framerates be a problem, try first to do a Pocket Fighter clone for MSX first.
or even.... puzzle fighter 2 turbo. =\

please, use Covox or mp3 cart to do the voices ok?

hadouken!!

@norakomi:

page 0: displayed
page 1: draw overlapping sprites on clean buffer
page 2: blitter cleanup

rotate these 3 every frame.doh

I didn't read the entire thing, but estimating performance is not really that difficult.

Since you have large sprites that won't copy within an interrupt. You need double buffering. To increase speed, you want to avoid having to backup the original graphics, so you would use one extra page as an empty background.

Page 0: display buffer 1
Page 1: display buffer 2
Page 2: background buffer
Page 3: player gfx

Assuming 2 player sprites with approximately 96x96 area.

At these sizes, restoring a sprite is about one interrupt. Transparant copying takes about three times as much. Which means that two players take 8 interrupts to update => max framerate 60 / 8 = 7.5 fps.

If page 3 is not enough space, then you'd have two options. Copy into vram with port $98. This will at its fastest (outi) 3.3kB/s. A rectangular area will be slower, so you're looking at 2 ints per sprite => 60 / 12 = 5 fps.

The second option is to use the VDP command to upload directly into a rectangle. However, this requires a status register check for every write, which basically brings the whole thing down even further and you end up with a slideslow. Not recommended.

So the question really is, is 7.5 fps or 5 fps enough for a game like this?