graphics: actually do 32-bit writes to VGA

Use "rep movsd" to copy data to VGA memory, not "rep movsb".

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/core/graphics.inc b/core/graphics.inc
index 884776e..26925e9 100644 (file)
--- a/core/graphics.inc
+++ b/core/graphics.inc
@@ -206,8 +206,8 @@ outputvga:
 .loop1:
                out dx,al       ; Select the bit plane to write
                push di
-               mov cx,640/8
-               rep movsb
+               mov cx,640/32
+               rep movsd
                pop di
                add ax,ax
                cmp al,8