VGA_ATT_R 448 include/video/vga.h return vga_r (regbase, VGA_ATT_R); VGA_ATT_R 460 include/video/vga.h return vga_io_r (VGA_ATT_R); VGA_ATT_R 472 include/video/vga.h return vga_mm_r (regbase, VGA_ATT_R);