PC monitor operation.
With no CRT monitor connected to a pc the Hsync and Vsync pins will stay at
5V. Power down , connect monitor , power up both and Hsync and Vsync drop to TTL logic High but what is also required to make the pc send out sync pulses to the monitor ? Do the DDC lines do more than identify the monitor type ? ie if that data is absent will the pc not respond at all. |
PC monitor operation.
"n cook" wrote in message ... With no CRT monitor connected to a pc the Hsync and Vsync pins will stay at 5V. Power down , connect monitor , power up both and Hsync and Vsync drop to TTL logic High but what is also required to make the pc send out sync pulses to the monitor ? Do the DDC lines do more than identify the monitor type ? ie if that data is absent will the pc not respond at all. More on DDC: http://pinouts.ru/data/VGAVesaDdc_pinout.shtml |
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