EXHIBIT 99.1 July 21, 2003 Ralph V. Whitworth Relational Investors, L.P. 11975 El Camino Real, Suite 300 San Diego, CA 92130 Dear Mr. Whitworth: Upon receipt of an executed counterpart hereof, this letter will be an agreement (the "Agreement") between...Agreement • July 23rd, 2003 • National Semiconductor Corp • Semiconductors & related devices • Delaware
