scale up the visualization

boot.s

@@ -66,27 +66,42 @@ palette_loop:
 	# TODO first 16 + grayscale
 
 before_loop:
+.set SCALE, 6
+
 	mov $0xA000, %ax # ES = vga memory
 	mov %ax, %es
 
 	mov $0x7c0, %ax # DS = the bootsector
 	mov %ax, %ds
 
+	# %bl/h - scale iterators
+	# %cl - current byte
 	# %si - position in sector
 	# %di - position in vga mem
 	mov $0, %si
-	mov $0, %di
+	mov $320*4+4, %di
 loop:
 	movb %ds:(%si), %cl
+	mov $SCALE, %bh
+y_loop:
+	mov $SCALE, %bl
+x_loop:
 	movb %cl, %es:(%di)
+	inc %di
+	dec %bl # loop ctr
+	jnz x_loop
+
+	add $320-SCALE, %di
+	dec %bh
+	jnz y_loop
+	sub $(320-1)*SCALE, %di
 
 	inc %si
-	inc %di
 
 	mov $15, %cl  # check if %si is a multiple of 16
 	and %si, %cx
 	jnz not_eol   # if it is
-	add $304, %di # go down
+	add $(320-16)*SCALE, %di # go down
 not_eol:
 
 	cmp $512, %si