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Improve address counting.

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This commit is contained in:
Thomas Harte 2024-09-27 21:27:56 -04:00
parent 7817b23857
commit 6eace2a3ef
1 changed files with 5 additions and 3 deletions
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8
Components/6845/CRTC6845.hpp
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@ -221,6 +221,8 @@ template <class BusHandlerT, Personality personality, CursorType cursor_type> cl
extra_scanline_
);
// TODO: eof_latched_
//
// Horizontal.
//
@ -272,7 +274,7 @@ template <class BusHandlerT, Personality personality, CursorType cursor_type> cl
if(new_frame) {
next_row_address_ = 0;
} else if(line_total_hit && character_total_hit) {
next_row_address_ = bus_state_.row_address + 1;
next_row_address_ = (bus_state_.row_address + 1) & 31;
} else {
next_row_address_ = bus_state_.row_address;
}
@ -308,9 +310,9 @@ template <class BusHandlerT, Personality personality, CursorType cursor_type> cl
if(new_frame) {
bus_state_.refresh_address = layout_.start_address;
} else if(character_total_hit) {
layout_.start_address = line_address_;
bus_state_.refresh_address = line_address_;
} else {
layout_.start_address = (layout_.start_address + 1) & RefreshMask;
bus_state_.refresh_address = (bus_state_.refresh_address + 1) & RefreshMask;
}
}
}