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Avoid circular state dependency.

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This commit is contained in:
Thomas Harte
2025-09-24 14:30:37 -04:00
parent ca6359a597
commit a7cceb5fa9
1 changed files with 3 additions and 4 deletions
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7
Components/6845/CRTC6845.hpp
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@@ -184,6 +184,7 @@ public:
bus_state_.refresh == layout_.cursor_address;
bus_state_.display_enable = character_is_visible_ && row_is_visible_;
bus_handler_.perform_bus_cycle(bus_state_);
// TODO: exposed line address should be a function of interlaced video flag, as latched.
//
// Shared, stateless signals.
@@ -205,23 +206,21 @@ public:
// Addressing.
//
const auto initial_line_address = line_address_;
if(new_frame) {
line_address_ = layout_.start_address;
} else if(character_counter_ == layout_.horizontal.displayed && line_end_hit) {
line_address_ = bus_state_.refresh;
// TODO: does this create a conflict with line_address_ heading in the other direction below?
}
if(new_frame) {
bus_state_.refresh = layout_.start_address;
} else if(character_total_hit) {
bus_state_.refresh = line_address_;
bus_state_.refresh = initial_line_address;
} else {
++bus_state_.refresh;
}
// TODO: exposed line address should be a function of interlaced video flag, as latched.
//
// Sync.
//