- tty: only report unrecognized scancodes once; forget about

remembering the origin and cursor position as that feature didn't
   really work properly anyway
 - tty: map in video and font memory using a vm call, access it from C,
   thereby eliminating pesky weird segment calls and assembly to access it,
   and unbreaks loadfont (Roman Ignatov)
 - bios_wini: fix bios_wini by allocating a <1MB buffers for it
 - memory: preallocate ramdisk, makes it a bit faster (and doesn't
   fail halfway if you allocate a huge one)
 - floppy: use <1MB buffer
 - ramdisk proto: because of the 2x1 page reservations, binaries
   got a little fatter and didn't fit on the ramdisk any more.
   increase it.

drivers/memory/memory.c

@@ -403,7 +403,8 @@ int safe;
 #endif
 
 	/* Try to allocate a piece of memory for the RAM disk. */
-	if((mem = mmap(0, ramdev_size, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0)) == MAP_FAILED) {
+	if((mem = mmap(0, ramdev_size, PROT_READ|PROT_WRITE,
+		MAP_PREALLOC|MAP_ANON, -1, 0)) == MAP_FAILED) {
 	    printf("MEM: failed to get memory for ramdisk\n");
             return(ENOMEM);
         }