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This is usually done so the programmer can forget about initializing in
the future, but it not only hides programming mistakes, but we are also
resetting memory addresses which are never to be used by this simple
game. Hence, just skip resetting RAM altogether.
Last but not least, sprite initialization in `reset` code has also been
optimized so instead of around 2000 cycles it takes half of that. This
is done by only touching the first byte of the four bytes for a sprite
in OAM, which is enough for hiding random sprites and the cost of extra
`inx` instructions is far cheaper than all the extra `sta` to absolute
address with X-index from the old code.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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The steps by which a player increases its current velocity to reach the
target one has been adapted on PAL, so every five frames it takes an
extra step compared to NTSC. This at least brings PAL to grow its values
at the same rate as NTSC.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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That is, stick more closely to what the reference reset implementation
does.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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During other transitions like game over and such it might also be needed
to have something similar, but for now this should cut it.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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This commit adds the skeleton for having a title and a main screen. For
now the title menu doesn't do much, as the selection is simply ignored,
but at least it already knows how to cycle between these two states.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
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