Print a dot for each loaded sector in bootloader

boot.asm

@@ -298,9 +298,8 @@ execute_kernel:
 	jmp 0:0x500
 
 ; Note: bx will point to after the read data
-; Note: ax, cx, and di will be clobbered
+; Note: ax, cx, dx, and di will be clobbered
 loadsectors:
-	push dx
 
 	.loop:
 		mov di, 3 + 1 ; Retry thrice, + 1 is since we dec first
@@ -345,6 +344,9 @@ loadsectors:
 
 		jc .error
 
+		mov ax, 0x0e00 + '.'
+		int 0x10
+
 		pop cx
 		pop ax
 
@@ -353,7 +355,6 @@ loadsectors:
 
 		loop .loop
 
-	pop dx
 	ret
 
 	.error:
@@ -372,12 +373,12 @@ loadsectors:
 		jmp .retry
 
 fatal_error:
-	lodsb
-	test al, al
-	jz hang
-	mov ah, 0xe
-	int 0x10
-	jmp fatal_error
+	mov cx, 9
+	.loop:
+		lodsb
+		mov ah, 0xe
+		int 0x10
+		loop .loop
 
 hang:
 	hlt
@@ -389,8 +390,8 @@ ettinos_kernel_cluster dw 0
 
 ettinos_kernel_name db "SYSTEM  BIN"
 
-notfound_msg db "No kernel", 0
-diskerror_msg db "Disk error", 0
+notfound_msg db "No kernel"
+diskerror_msg db "Disk error"
 choose_msg db "(E)ttinOS/Nor86?", 0
 
 times 510-($-$$) db 0