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Per the IIgs tech note, this value works the other way around.

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Thomas Harte 2020-11-07 23:15:07 -05:00
parent 3bb3d8c5c1
commit 81c38c7200
1 changed files with 4 additions and 1 deletions
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5
Machines/Apple/AppleII/Video.hpp
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@ -174,7 +174,10 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
// Apply carry into the row counter and test it for location.
int mapped_row = row_ + (mapped_column / 65);
return (mapped_row % 262) >= 192;
// Per http://www.1000bit.it/support/manuali/apple/technotes/iigs/tn.iigs.040.html
// "on the IIe, the screen is blanked when the bit is low".
return (mapped_row % 262) < 192;
}
private: