
This is a standalone VGA demo that runs with or without input.  It will accept
two pins ui_io[0] and ui_io[1] for palette color selection:
| ui_io[1:0] | Palette | 
|---|---|
| 0 | Green (default) | 
| 1 | Red | 
| 2 | Blue | 
| 3 | Pride | 
Plug into a VGA monitor and select this circuit to test
Requires the TinyVGA PMOD
| # | Input | Output | Bidirectional | 
|---|---|---|---|
| 0 | Palette 0 | R1 | |
| 1 | Palette 1 | G1 | |
| 2 | B1 | ||
| 3 | VSync | ||
| 4 | R0 | ||
| 5 | G0 | ||
| 6 | B0 | ||
| 7 | HSync |