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vga spec;left border,right border,top border,bottom border

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cyboman

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i don't know where to post this so i'm posting it here.

i'm trying to build a very simple vga controller in fpga. i found the spec but there is only one thing that i don't understand. i can't figure out what the borders are. what is top border, bottom borer, right and left borders. the signal diagram that i found (https://www.epanorama.net/documents/pc/vga_timing.html) speaks shows only a front and back porches but noting about the borders. i would really appreciate if someone could explain there the borders are located with respect to the signal diagram.

thank you.
 

keith1200rs

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Re: vga spec;left border,right border,top border,bottom bord

I think it is a hangover from CGA where there was a separate border colour:

"In text mode, the border color (displayed outside the regular display area—into the overscan area) can be changed from its usual black to any of the other 15 colors." - CGA info.

I would suggest you just make it black.

Keith.
 

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