determine the amout of video ram
Kevin Freeman
kfreem02 at comcast.net
Fri Dec 12 05:36:28 UTC 2003
On Thu, 2003-12-11 at 15:23, Rick Stevens wrote:
> Don't forget the color depth. If you go to 8- or 16-bit color rather
> than the 24-bit color, you cut your memory requirements by 33-66%. You
> can then get the 1152x864 size, but not as many colors. Here is the
> video RAM needed for an 1152x864 display:
>
> 24-bit: 24MB
> 16-bit: 15MB
> 8-bit: 7.5MB
>
Those numbers are very "generous" ... ;)
> If all you can give is 8MB, you're limited to an 8-bit 1152x864 display
> (256 colors). The formula is:
>
> video RAM needed (in MB) = (width x height x number-of-bits)/1048576
This result of the above formula is mega bits, not mega bytes. You need
to divide the result by 8 to get the video RAM in MB. Therefore, a
display of 1152x864x24 requires slightly less than 3MB of video RAM.
Kevin Freeman
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