The Gentoo build CD kernel image has USB support (detects USB keyboard and mouse fine), but since it initializes the USB devices in detecting them, any "Legacy support" provided by the BIOS ceases to function. The reason why is that there is either input core keyboard support or HID support in that kernel. Anyone wanting to use a USB keyboard to install Gentoo, can't. Fix is easy, just include HID support and input core and input core keyboard support in the kernel. Then USB keyboarders should be happy.
OK, the -r15 CD includes input core keyboard and full HID support in the kernel. It's not working for you, or is it? Was this problem with the -r14 or -r15 iso?
Sorry, forgot to mention. The problem was with the -r14 ISO
The -r15 ISO works perfectly with USB input devices. Thanks.