+ struct tag *t = (struct tag *)params;
+ unsigned int nr_pages = 0, page_size = PAGE_SIZE;
+
+ if (t->hdr.tag == ATAG_CORE)
+ {
+ for (; t->hdr.size; t = tag_next(t))
+ {
+ if (t->hdr.tag == ATAG_VIDEOTEXT)
+ {
+ video_num_rows = t->u.videotext.video_lines;
+ video_num_cols = t->u.videotext.video_cols;
+ bytes_per_char_h = t->u.videotext.video_points;
+ bytes_per_char_v = t->u.videotext.video_points;
+ video_x = t->u.videotext.x;
+ video_y = t->u.videotext.y;
+ }
+
+ if (t->hdr.tag == ATAG_MEM)
+ {
+ page_size = PAGE_SIZE;
+ nr_pages += (t->u.mem.size / PAGE_SIZE);
+ }
+ }
+ }
+ else
+ {
+ nr_pages = params->nr_pages;
+ page_size = params->page_size;
+ video_num_rows = params->video_num_rows;
+ video_num_cols = params->video_num_cols;
+ video_x = params->video_x;
+ video_y = params->video_y;
+ bytes_per_char_h = params->bytes_per_char_h;
+ bytes_per_char_v = params->bytes_per_char_v;
+ }
+
+ video_size_row = video_num_cols * bytes_per_char_h;