Compact bootloader code

boot/fat32.asm

@@ -203,36 +203,31 @@ loop:	add si, 0x20
 	jne loop
 	ret
 
-main:	mov ax, 2
+loadr:	mov ax, 2
 	xor dx, dx
-	call load
+	jmp load
 
-	; search for an system directory
+loadf:	call search
+	jne end
+	mov ax, [si+0x1A]
+	mov dx, [si+0x14]
+	jmp load
+
+main:	; load root directory
+	call loadr
+	; search for first system directory
 	mov ah, 0x14
-	call search
-	jne end
-
-	mov ax, [si+0x1A]
-	mov dx, [si+0x14]
-
-	call load
+	call loadf
+	; search for first system file
 	mov ah, 0x04
-	call search
-	jne end
-
-	mov ax, [si+0x1A]
-	mov dx, [si+0x14]
-
-	call load
+	call loadf
+	; jump
 	jmp 0:0x7C00
 
 end:	call msg
 	db "DIR", 0
 	jmp err
 
-	; segment register for data
-dest:	dw 0x07c0
-
 	; Padding and signature
 	times (0x1FE - ($-$$)) db 0
 	dw 0xAA55