Equity Movers: Compaq, RadiSys, Razorfish, Actel

Compaq Computer (CPQ): The personal computer maker warned that its fourth-quarter profit from operations will be 28 cents to 30 cents a share. Analysts polled by First Call/Thomson Financial expected the company to earn 36 cents. Shares of Compaq fell $1.75, or about 8 percent, to $19.02 in midday trading.

Net2Phone (NTOP): The company that allows people to make calls from their computer said it had a loss of 25 cents a share in its first quarter ended Oct. 31. Analysts polled by First Call/Thomson Financial expected the company to lose 30 cents. Shares of Net2Phone gained $2.38, or about 24 percent, to $12.13.

RadiSys (RSYS): The maker of computer systems said Tuesday it expects to earn 20 cents to 24 cents for the fourth quarter, less than the 41 cents expected by analysts polled by First Call/Thomson Financial. Shares of RadiSys fell $6.44, or almost 23 percent, to $21.75.

Razorfish (RAZF): The Web site design and Internet consulting company said it expects to have a fourth-quarter pro forma net loss of 17 cents to 22 cents a share. Analysts polled by First Call/Thomson Financial expected the company to earn 2 cents a share. Shares of Razorfish fell $1.28, or about 41 percent, to $1.81.

Actel (ACTL): The computer-chipmaker warned that its fourth-quarter revenue would not meet earlier estimates, and instead would be about the same as the $60.1 million in revenue from the third quarter. Shares of Actel fell $6.25, or almost 21 percent, to $23.75.

Electronic Arts (ERTS): The video game maker said it will develop games for Microsoft's Xbox video game system, scheduled for release next fall. Shares of Electronic Arts rose $1.25, or about 3 percent, to $42.94