diff --git a/ansi.asm b/ansi.asm
index 09b608f..714a8d1 100644
--- a/ansi.asm
+++ b/ansi.asm
@@ -84,15 +84,12 @@ _d	equ 1
 	sbc >rows,x
 	pha
 
-
 ;
 ; mvn:
-; while (--a != -1)
-; 	dest[y++] = dest[x++];
+; do { src[y++] = dest[x++]; } while (--c != 0xffff)
 ;
 ; mvp:
-; while(--a != -1)
-;  dest[y--] = dest[x--];
+; do { src[y--] = dest[x--]; } while (--c != 0xffff)
 
 
 
@@ -364,7 +361,7 @@ _d	equ 1
 	pha ; save length
 
 
-	ldx <line2
+	ldx <line1
 	lda >rows,x
 	tax
 	tay
diff --git a/vt100.c b/vt100.c
index 33136ce..704b2f9 100644
--- a/vt100.c
+++ b/vt100.c
@@ -35,6 +35,9 @@ int __x;
 int __y;
 
 
+#define __brk() asm { brk 0xea }
+
+
 static unsigned saved_cursor[2]; // saved cursor position
 static unsigned window[2];
 static unsigned and_mask;
@@ -373,6 +376,7 @@ static void erase_line(void) {
 
 static void erase_screen(void) {
 	unsigned i;
+
 	for (i = 0; i < parm_count; ++i) {
 		switch(parms[i]) {
 			case 0: