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Corrects the TMS' get_scaled_scan_status.

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I think all platforms are now returning credible numbers.
This commit is contained in:
Thomas Harte 2020-01-22 19:34:10 -05:00
parent 56448373ae
commit 9d97a294a7
1 changed files with 5 additions and 1 deletions
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6
Components/9918/9918.cpp
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@ -118,7 +118,11 @@ void TMS9918::set_scan_target(Outputs::Display::ScanTarget *scan_target) {
}
Outputs::Display::ScanStatus TMS9918::get_scaled_scan_status() const {
return crt_.get_scaled_scan_status();
// The input was scaled by 3/4 to convert half cycles to internal ticks,
// so undo that and also allow for: (i) the multiply by 4 that it takes
// to reach the CRT; and (ii) the fact that the half-cycles value was scaled,
// and this should really reply in whole cycles.
return crt_.get_scaled_scan_status() * (4.0f / (3.0f * 8.0f));
}
void TMS9918::set_display_type(Outputs::Display::DisplayType display_type) {