Help: What does this mean

Hi: I setup the following keycodes with xmodmap: keycode 24 = q Q 0x0b8 0x0c8 0x0d8 0x0e8 each keycode will generate 6 possible keycodes. My modifier map looks like this: shift Shift_L (0x32), Shift_R (0x3e) lockCaps_Lock (0x42) control Control_L (0x25), Control_R (0x6d) m

Help!!! What does this mean???

I just received this message while booting up.  I had removed an sdram chip, ( going from 128 to 64m pc100) and turned the box on.  What does this mean? ... VFS: Mounted root (ext2 filesystem) readonly. Unable to handle kernel paging request at virtual address c800 current->tss.cr3 =