diff --git a/extboot/extboot.S b/extboot/extboot.S
index 9eb9333..723bebd 100644
--- a/extboot/extboot.S
+++ b/extboot/extboot.S
@@ -185,39 +185,6 @@ int19_handler:
 	pop %ax
 .endm
 
-.macro callout value
-	push %bp
-	push %bx
-	mov %sp, %bp
-	alloca $16
-	push %ax
-	push %dx
-
-	mov %ax, 0(%bx)     /* ax */
-	mov 0(%bp), %ax     /* bx */
-	mov %ax, 2(%bx)
-	mov %cx, 4(%bx)     /* cx */
-	mov %dx, 6(%bx)     /* dx */
-	mov %si, 8(%bx)     /* si */
-	mov %ds, 10(%bx)    /* ds */
-	mov %es, 12(%bx)    /* ds */
-	movw \value, 14(%bx) /* value */
-
-	mov %bx, %ax
-	shr $4, %ax
-	mov %ds, %dx
-	add %dx, %ax
-
-	mov $0x407, %dx
-	outw %ax, %dx
-
-	pop %dx
-	pop %ax
-	freea
-	pop %bx
-	pop %bp
-.endm
-
 send_command:
 	push %bp
 	mov %sp, %bp
@@ -239,10 +206,6 @@ send_command:
 	pop %ax
 	pop %bp
 
-	push %ax
-	mov 2(%bx), %ax
-	pop %ax
-
 	ret
 
 add32:  /* lo, hi, lo, hi */