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Don't limit sprite fetch area; add further commentary.

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This commit is contained in:
Thomas Harte 2022-07-19 16:37:13 -04:00
parent feee6afe0f
commit 57186c3c14
2 changed files with 2 additions and 2 deletions
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2
Machines/Amiga/Chipset.cpp
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@ -610,7 +610,7 @@ template <int cycle, bool stop_if_cpu> bool Chipset::perform_cycle() {
}
if constexpr (cycle >= 0x16 && cycle < 0x36) {
if((dma_control_ & SpritesFlag) == SpritesFlag && y_ >= vertical_blank_height_) {
if((dma_control_ & SpritesFlag) == SpritesFlag) {
constexpr auto sprite_id = (cycle - 0x16) >> 2;
static_assert(sprite_id >= 0 && sprite_id < std::tuple_size<decltype(sprites_)>::value);

2
Machines/Amiga/Sprites.cpp
View File

@ -83,7 +83,7 @@ bool Sprite::advance_dma(int offset, int y) {
}
} else {
visible |= y == v_start_;
if(!visible) return false;
if(!visible) return false; // Act as if there wasn't a fetch.
// Write colour word 1, then colour word 0; 0 is the word that 'arms'
// the sprite (i.e. makes it visible).