At 01:54 PM 2/13/2004, you wrote:
Yes, but it's only relative repositioning, so you don't need a timed
RESPMx, just a write to HMMx and HMOVE. Have a look at Glenn's Death
Derby to get an idea what is possible with missiles (the zombies).
And when you think about the Joustpong kernel vs. the DD kernel, Joustpong
is a lot simpler in the sense that:
a) only 2 bits of playfield are dynamic per scanline on the extreme edges
of the screen. PF1 and PF2 can be set to blank for the entire
screen. Playfield management should be a lot easier.
b) The Joust player are constrained horizontally. Therefore the logic that
decides how to draw the sprites can be bunched into the center of the
scanline. DD has a very complicated way of branching around to avoid
tearing problems that is unnecessary with JP.
c) Joust Pong does have a ball that moves across the entire horizontal
whereas DD only has a ball on the scanlines between tombstones. However,
it only needs one missile for the Pterry instead of maintaining both for 2
Zombies on DD.
So I'm sure he could do a Pterry.
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