2  *  linux/drivers/video/mdacon.c -- Low level MDA based console driver
6  *      including portions (c) 1995-1998 Patrick Caulfield.
10  *  This file is based on the VGA console driver (vgacon.c):
16  *  and on the old console.c, vga.c and vesa_blank.c drivers:
45 #include <asm/vga.h>
64 static int	mda_cursor_loc=-1;
65 static int	mda_cursor_size_from=-1;
66 static int	mda_cursor_size_to=-1;
105  * MDA could easily be classified as "pre-dinosaur hardware".
179 	/* command line format: mdacon=<first>,<last> */  in mdacon_setup()
346 	/* cursor looks ugly during boot-up, so turn it off */  in mdacon_startup()
347 	mda_set_cursor(mda_vram_len - 1);  in mdacon_startup()
352 	return "MDA-2";  in mdacon_startup()
357 	c->vc_complement_mask = 0x0800;	 /* reverse video */  in mdacon_init()
358 	c->vc_display_fg = &mda_display_fg;  in mdacon_init()
361 		c->vc_cols = mda_num_columns;  in mdacon_init()
362 		c->vc_rows = mda_num_lines;  in mdacon_init()
374 	/* con_set_default_unimap(c->vc_num); */  in mdacon_deinit()
384 	/* Underline and reverse-video are mutually exclusive on MDA.  in mda_convert_attr()
385 	 * Since reverse-video is used for cursors and selected areas,  in mda_convert_attr()
419 	for (; count > 0; count--) {  in mdacon_invert_region()
435 	for (; count > 0; count--) {  in mdacon_putcs()
444 	u16 eattr = mda_convert_attr(c->vc_video_erase_char);  in mdacon_clear()
460 				mda_convert_attr(c->vc_video_erase_char),  in mdacon_blank()
461 				c->vc_screenbuf_size);  in mdacon_blank()
477 		mda_set_cursor(mda_vram_len - 1);  in mdacon_cursor()
481 	mda_set_cursor(c->state.y * mda_num_columns * 2 + c->state.x * 2);  in mdacon_cursor()
483 	switch (CUR_SIZE(c->vc_cursor_type)) {  in mdacon_cursor()
497 	u16 eattr = mda_convert_attr(c->vc_video_erase_char);  in mdacon_scroll()
502 	if (lines > c->vc_rows)   /* maximum realistic size */  in mdacon_scroll()
503 		lines = c->vc_rows;  in mdacon_scroll()
509 				(b-t-lines)*mda_num_columns*2);  in mdacon_scroll()
510 		scr_memsetw(mda_addr(0, b - lines), eattr,  in mdacon_scroll()
516 				(b-t-lines)*mda_num_columns*2);  in mdacon_scroll()
551 	err = do_take_over_console(&mda_con, mda_first_vc-1, mda_last_vc-1, 0);  in mda_console_init()