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Switches back to being explicit about the colour burst phase.

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Some sort of phase inversion otherwise seems to be achievable by software that switch modes often.
This commit is contained in:
Thomas Harte 2019-02-24 22:28:11 -05:00
parent 7bb90c78d9
commit 16731661e8
2 changed files with 7 additions and 2 deletions
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7
Machines/AppleII/Video.cpp
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@ -18,7 +18,12 @@ VideoBase::VideoBase(bool is_iie, std::function<void(Cycles)> &&target) :
// Show only the centre 75% of the TV frame.
crt_.set_display_type(Outputs::Display::DisplayType::CompositeColour);
crt_.set_visible_area(Outputs::Display::Rect(0.118f, 0.122f, 0.77f, 0.77f));
crt_.set_immediate_default_phase(0.5f);
// TODO: there seems to be some sort of bug whereby switching modes can cause
// a signal discontinuity that knocks phase out of whack. So it isn't safe to
// use default_colour_bursts elsewhere, though it otherwise should be. If/when
// it is, start doing so and return to setting the immediate phase up here.
// crt_.set_immediate_default_phase(0.5f);
character_zones[0].xor_mask = 0;
character_zones[0].address_mask = 0x3f;

2
Machines/AppleII/Video.hpp
View File

@ -534,7 +534,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
const int colour_burst_start = std::max(first_sync_column + sync_length + 1, column_);
const int colour_burst_end = std::min(first_sync_column + sync_length + 4, ending_column);
if(colour_burst_end > colour_burst_start) {
crt_.output_default_colour_burst((colour_burst_end - colour_burst_start) * 14);
crt_.output_colour_burst((colour_burst_end - colour_burst_start) * 14, 0);
}
second_blank_start = std::max(first_sync_column + sync_length + 3, column_);