scrollbmap
static void scrollbmap(bmap_t *, u_short, u_short, u_short, u_short,
scrollbmap (bm, 0, dy*ip->ftheight,
scrollbmap (bm, 0, sy*ip->ftheight,
static void scrollbmap(bmap_t *, u_short, u_short, u_short, u_short,
scrollbmap(bm, 0, dy * ip->font.height, bm->bytes_per_row >> 3,
scrollbmap(bm, 0, sy * ip->font.height, bm->bytes_per_row >> 3,