Change to 16-bit card ID register

boot/boot.68k

@@ -1,6 +1,6 @@
 .global _start
 _start:
-move.b #0x4, d0
+move.w #0x4, d0 | Find a storage card
 bsr.w find_first_card
 | Load the header sector for the kernel binary
 move.l #0x200, a1 | Set the destination address to 0x200
@@ -53,9 +53,9 @@ find_first_card:
   move.l #0xff0000, a0 | a0 holds the address of the current card
 ffc_loop:
   lea (0x100, a0), a0 | Move to the next card
-  move.b (0xff, a0), d1 | Load the type of the card into d1
+  move.w (0xfe, a0), d1 | Load the type of the card into d1
   beq.b ffc_done | If the type is 0 (empty slot), we have scanned all cards, so exit the loop
-  cmp.b d0, d1 | If the card is the type we want, return with the address in a0
+  cmp.w d0, d1 | If the card is the type we want, return with the address in a0
   beq.b ffc_done
   bra.b ffc_loop | Loop back and check the next card
 ffc_done: