Reduced port writes which can adjust programmatic sync, and prevented anything while NMI generation is active. Moved line counter increment from triggered by interrupt acknowledge to triggered by horizontal sync. In both cases, cribbing from my own earlier work. Initial results suggest that sync issues are resolved in third-party software.
Reduced port writes which can adjust programmatic sync, and prevented anything while NMI generation is active. Moved line counter increment from triggered by interrupt acknowledge to triggered by horizontal sync. In both cases, cribbing from my own earlier work. Initial results suggest that sync issues are resolved in third-party software.

TomHarte/CLK,TomHarte/CLK,TomHarte/CLK,TomHarte/CLK,TomHarte/CLK