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Correct fetch window.

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This commit is contained in:
Thomas Harte 2021-09-23 18:13:24 -04:00
parent 7092429f7c
commit 60bad22a91
1 changed files with 4 additions and 4 deletions
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8
Machines/Amiga/Chipset.cpp
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@ -133,8 +133,8 @@ template <int cycle> void Chipset::output() {
LINK(burst, output_default_colour_burst, burst - blank2); // TODO: only if colour enabled. LINK(burst, output_default_colour_burst, burst - blank2); // TODO: only if colour enabled.
LINK(blank3, output_blank, blank3 - burst); LINK(blank3, output_blank, blank3 - burst);
display_horizontal_ |= (cycle*2) == fetch_window_[0]; display_horizontal_ |= (cycle << 1) == fetch_window_[0];
display_horizontal_ &= (cycle*2) != fetch_window_[1]; display_horizontal_ &= (cycle << 1) != fetch_window_[1];
if constexpr (cycle > blank3) { if constexpr (cycle > blank3) {
const bool is_pixel_display = display_horizontal_ && fetch_vertical_; const bool is_pixel_display = display_horizontal_ && fetch_vertical_;
@ -238,8 +238,8 @@ template <int cycle, bool stop_if_cpu> bool Chipset::perform_cycle() {
// Update state as to whether bitplane fetching should happen now. // Update state as to whether bitplane fetching should happen now.
// //
// TODO: figure out how the hard stops factor into this. // TODO: figure out how the hard stops factor into this.
fetch_horizontal_ |= cycle == fetch_window_[0]; fetch_horizontal_ |= (cycle << 1) == fetch_window_[0];
fetch_horizontal_ &= cycle != fetch_window_[1]; fetch_horizontal_ &= (cycle << 1) != fetch_window_[1];
// Top priority: bitplane collection. // Top priority: bitplane collection.
if((dma_control_ & BitplaneFlag) == BitplaneFlag) { if((dma_control_ & BitplaneFlag) == BitplaneFlag) {