# VGA

## Driving from a FPGA

The [Go Board](https://nandland.com/the-go-board/) supports VGA output. But you have to get it just right or it will not work:

* With a 25MHz clock, the most you can drive is 640x480 at 60Hz. The 25MHz is close enough to the *pixel clock* of this mode (25.175MHz): http://tinyvga.com/vga-timing/640x480@60Hz
* You have to make sure the red, green, and blue levels are at 0 during the horizontal and vertical syncs, or the display will be blank.

More details: https://www.reddit.com/r/FPGA/comments/115jmd7/comment/j939brt/