EXHIBIT 11.1 STB SYSTEMS, INC. AND SUBSIDIARIES COMPUTATION OF EARNINGS PER COMMON AND COMMON EQUIVALENT SHARE FOR THE YEARS ENDED OCTOBER 31, 1996 AND 1995 - ------------------------------------------------------------------------------ (IN THOUSANDS EXCEPT SHARE AND PER SHARE AMOUNTS) 1996 1995 ---------------------- PRO FORMA Net income (loss) $ 6,077 $ 1,998 Pro forma adjustment to general and administrative expenses 220 Pro forma adjustment to reflect interest on Founding Shareholder Notes (52) Pro forma adjustment to reflect federal income taxes (483) ---------------------- Net income (loss), as adjusted $ 6,077 $ 1,683 ---------------------- ---------------------- PRIMARY: Weighted average number of shares outstanding 4,502,692 3,672,161 Additional weighted average shares to reflect pro forma adjustment for distribution of S Corp earnings 74,234 Additional weighted average shares from assumed exercise of dilutive stock options, net of shares assumed to be repurchased with exercise proceeds 44,064 - ---------------------- Net income (loss) per share $ 1.34 $ 0.45 ---------------------- ---------------------- FULLY DILUTIVE Weighted average number of shares outstanding 4,502,692 3,672,161 Additional weighted average shares to reflect pro forma adjustment for distribution of S Corp earnings 74,234 Additional weighted average shares from assumed exercise of dilutive stock options, net of shares assumed to be repurchased with exercise proceeds 202,921 - ---------------------- Net income (loss) per share $ 1.29 $ 0.45 ---------------------- ----------------------