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Fix column addressing in modes 6 and 7.

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This commit is contained in:
Thomas Harte 2023-03-04 21:39:00 -05:00
parent e58a488add
commit 8fc043247c
1 changed files with 2 additions and 2 deletions
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4
Components/9918/Implementation/Fetch.hpp
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@ -587,7 +587,6 @@ template<bool use_end> void Base<personality>::fetch_sms(LineBuffer &line_buffer
template <Personality personality>
template<ScreenMode mode> void Base<personality>::fetch_yamaha(LineBuffer &line_buffer, LineBuffer &next_line_buffer, int y, int end) {
const AddressT rotated_name_ = pattern_name_address_ >> 1;
const uint8_t *const ram2 = &ram_[65536];
CharacterFetcher character_fetcher(this, line_buffer, next_line_buffer, y);
TextFetcher text_fetcher(this, line_buffer, y);
@ -694,8 +693,9 @@ template<ScreenMode mode> void Base<personality>::fetch_yamaha(LineBuffer &line_
case ScreenMode::YamahaGraphics6:
case ScreenMode::YamahaGraphics7: {
const uint8_t *const ram2 = &ram_[65536];
const int column = Storage<personality>::next_event_->id << 3;
const auto start = bits<15>((y << 7) | column);
const auto start = bits<15>((y << 7) | (column >> 1));
// Fetch from alternate banks.
line_buffer.bitmap[column + 0] = ram_[rotated_name_ & AddressT(start + 0)];