fvdhoef / vera-module

Versatile Embedded Retro Adapter
MIT License
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VGA sync polarity is inverted #38

Closed jburks closed 1 year ago

jburks commented 1 year ago

The HSYNC and VSYNC polarity for 640x480 60Hz is negative on HSYNC and VSYNC according to the VGA spec. VERA's sync polarity is positive for both. Most modern LCD monitors do not appear to care if this is correct, but there are mixed results on older monitors, particularly CRT monitors.