#!/bin/bash
video_ram_area=`cat /proc/iomem  | grep "Video RAM area" | sed 's/: Video RAM area//g'`  
echo "--- Area of video mem ---"
echo $video_ram_area;

begin=`echo $video_ram_area | sed 's/-.*//' | sed 's/x//'`
end=`echo $video_ram_area | sed 's/^.*-//' | sed 's/x//'`

begin_up=`echo $begin | tr '[:lower:]' '[:upper:]'`
end_up=`echo $end   | tr '[:lower:]' '[:upper:]'`

begin_dec=`echo "ibase=16; $begin_up" | bc`
end_dec=`echo "ibase=16; $end_up" | bc`

echo "------------------------------"
echo "You have: $((( $end_dec - $begin_dec ) / 1024 )) MB of video RAM"
echo "------------------------------"