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Attempt to incorporate scroll offset into line interrupt.

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This commit is contained in:
Thomas Harte 2023-03-06 21:41:43 -05:00
parent 5471979f8d
commit a13905acf9
1 changed files with 5 additions and 2 deletions
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7
Components/9918/Implementation/9918.cpp
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@ -267,7 +267,10 @@ void TMS9918<personality>::run_for(const HalfCycles cycles) {
}
if constexpr (is_yamaha_vdp(personality)) {
if(this->fetch_pointer_.row == this->line_interrupt_target_) {
if(
this->vertical_active_ &&
this->fetch_pointer_.row == ((this->line_interrupt_target_ + Storage<personality>::vertical_offset_) & 0xff)
) {
this->line_interrupt_pending_ = true;
}
}
@ -1238,7 +1241,7 @@ HalfCycles TMS9918<personality>::get_next_sequence_point() const {
}
if constexpr (is_yamaha_vdp(personality)) {
next_line_interrupt_row = this->line_interrupt_target_;
next_line_interrupt_row = (this->line_interrupt_target_ + Storage<personality>::vertical_offset_) & 0xff;
}
// If there's actually no interrupt upcoming, despite being enabled, either return