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Keep three least bits.

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Thomas Harte
2025-01-12 22:07:56 -05:00
parent 972619c1fe
commit 1b1a0f553d
1 changed files with 2 additions and 2 deletions
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Machines/Commodore/Plus4/Video.hpp
+2 -2
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@@ -167,8 +167,8 @@ public:
case 0xff1d: vertical_counter_ = (vertical_counter_ & 0xff00) | value; break;
case 0xff1e:
// TODO: possibly should be deferred, if falling out of phase?
horizontal_counter_ = (horizontal_counter_ & 0x03) | ((~value << 1) & ~0x3);
horizontal_counter_ &= 511;
horizontal_counter_ = (horizontal_counter_ & 0x07) | ((~value << 1) & ~0x07);
horizontal_counter_ &= 0x1ff;
break;
case 0xff1f:
vertical_sub_count_ = value & 0x7;