3810 HD (250-3571) Adding Optional Equipment Faxback Doc. # 1767 Adding a Serial Device: * Connect a mouse (25-2001), fax/modem (25-3532), or other serial device to your computer's built-in serial port. * Add an External VGA Monitor to your computers built-in Video Port. * Add External Keyboard (25-3042).to your computer's built-in external keyboard port. Note: Both the computer's keyboard and an external keyboard can be used at the same time with the computer. * Optional Math Coprocessor to make programs that graphical design programs or programs that perform a large number of mathematical computations require your computer to do a lot of work. These types of programs can take additional time to run unless you have a math coprocessor in you computer. A coprocessor allows your computer to run these types of programs much faster. Cautions: * Be sure you touch a grounded metal object before handling the copro- cessor. * Be sure to correctly position the math coprocessor. Once the math coprocessor is installed, you must use a special chip extraction tool to remove the coprocessor. * You can add an External Disk Drive (25-1087). You can connect an external floppy disk drive to your computer's parallel port. Refer to the floppy disk drive's manual for installation instructions. (jej-05/10/94)