+ ansi_cls (a);
+ a->terminal->xmit (a->terminal, "\033=", 2);
+ a->terminal->xmit (a->terminal, "\033[?6l", 5);
+ a->terminal->xmit (a->terminal, "\033[r", 3);
+
+}
+
+#define HISTORY_GUESS_SCROLL 24 /*guess all 24 lines usually scroll */
+/*if they haven't then ansi_draw will patch it up*/
+
+void
+ansi_history (ANSI * a, History * h)
+{
+ char buf[32];
+ int i;
+/*Do we need to catch up on history?*/
+
+ if (a->history_ptr == h->wptr)
+ return;
+ ansi_resize_check (a);
+
+ if ((a->size.x < CRT_COLS) || (a->size.y < CRT_ROWS))
+ return;
+
+ ansi_force_attr_normal (a);
+ ansi_set_color (a, CRT_COLOR_NORMAL);
+
+ i = sprintf (buf, "\033[%d;%dr", 1, HISTORY_GUESS_SCROLL);
+ a->terminal->xmit (a->terminal, buf, i);
+
+
+ while (a->history_ptr != h->wptr)
+ {
+
+ History_ent *e = &h->lines[a->history_ptr];
+
+ HISTORY_INC (h, a->history_ptr);
+
+ if (!e->valid)
+ continue;
+
+ /*If so write the line ot the top of the screen */
+ ansi_draw_line (a, e->line, 0);
+
+
+ /*Roll HISTORY_GUESS_SCROLL lines up putting the top line into the xterm's history */
+
+
+ ansi_showhide_cursor (a, 1);
+ i = sprintf (buf, "\033[%d;%dH", HISTORY_GUESS_SCROLL, 1);
+ a->terminal->xmit (a->terminal, buf, i);
+ a->terminal->xmit (a->terminal, "\033D", 2);
+ a->pos.x = ANSI_INVAL;
+
+ /*now do the same in our image of the screen */
+
+ {
+ CRT_Pos s = { 0 }
+ , e =
+ {
+ 0};
+
+ /*scroll lines up */
+ for (s.y++; s.y < HISTORY_GUESS_SCROLL; s.y++, e.y++)
+ {
+ memcpy (&a->crt.screen[CRT_ADDR_POS (&e)],
+ &a->crt.screen[CRT_ADDR_POS (&s)],
+ sizeof (CRT_CA) * CRT_COLS);
+ }
+
+ /* erase new line */
+ s.y = e.y;
+ e.x = CRT_COLS - 1;
+ crt_erase (&a->crt, s, e, 1);
+ }