78 module_param(mda_first_vc, int, 0);
80 module_param(mda_last_vc, int, 0);
86 #define MDA_CURSOR_BLINKING	0x00
87 #define MDA_CURSOR_OFF		0x20
88 #define MDA_CURSOR_SLOWBLINK	0x60
90 #define MDA_MODE_GRAPHICS	0x02
91 #define MDA_MODE_VIDEO_EN	0x08
92 #define MDA_MODE_BLINK_EN	0x20
93 #define MDA_MODE_GFX_PAGE1	0x80
95 #define MDA_STATUS_HSYNC	0x01
96 #define MDA_STATUS_VSYNC	0x80
97 #define MDA_STATUS_VIDEO	0x08
99 #define MDA_CONFIG_COL132	0x08
100 #define MDA_GFX_MODE_EN		0x01
101 #define MDA_GFX_PAGE_EN		0x02
127 	outb_p(reg+1, mda_index_port); outb_p(val & 0xff, mda_value_port);  in write_mda_w()
154 	write_mda_w(location >> 1, 0x0e);  in mda_set_cursor()
165 		write_mda_b(MDA_CURSOR_OFF, 0x0a);	/* disable cursor */  in mda_set_cursor_size()
167 		write_mda_b(from, 0x0a);	/* cursor start */  in mda_set_cursor_size()
168 		write_mda_b(to,   0x0b);	/* cursor end */  in mda_set_cursor_size()
185 	if (ints[0] < 2)  in mdacon_setup()
186 		return 0;  in mdacon_setup()
190 		return 0;  in mdacon_setup()
202 	int count=0;  in mda_detect()
209 	q = mda_vram_base + 0x01000 / 2;  in mda_detect()
214 	scr_writew(0xAA55, p);  in mda_detect()
215 	if (scr_readw(p) == 0xAA55)  in mda_detect()
218 	scr_writew(0x55AA, p);  in mda_detect()
219 	if (scr_readw(p) == 0x55AA)  in mda_detect()
225 		return 0;  in mda_detect()
230 	scr_writew(0xA55A, q);  in mda_detect()
231 	scr_writew(0x0000, p);  in mda_detect()
232 	if (scr_readw(q) == 0xA55A)  in mda_detect()
235 	scr_writew(0x5AA5, q);  in mda_detect()
236 	scr_writew(0x0000, p);  in mda_detect()
237 	if (scr_readw(q) == 0x5AA5)  in mda_detect()
244 		mda_vram_len = 0x02000;  in mda_detect()
255 	if (!test_mda_b(0x66, 0x0f))  in mda_detect()
256 		return 0;  in mda_detect()
259 	if (!test_mda_b(0x99, 0x0f))  in mda_detect()
260 		return 0;  in mda_detect()
270 	for (count = 0; count < 50000 && p_save == q_save; count++) {  in mda_detect()
276 		switch (inb_p(mda_status_port) & 0x70) {  in mda_detect()
277 		case 0x10:  in mda_detect()
281 		case 0x50:  in mda_detect()
297 	write_mda_b(97, 0x00);		/* horizontal total */  in mda_initialize()
298 	write_mda_b(80, 0x01);		/* horizontal displayed */  in mda_initialize()
299 	write_mda_b(82, 0x02);		/* horizontal sync pos */  in mda_initialize()
300 	write_mda_b(15, 0x03);		/* horizontal sync width */  in mda_initialize()
302 	write_mda_b(25, 0x04);		/* vertical total */  in mda_initialize()
303 	write_mda_b(6,  0x05);		/* vertical total adjust */  in mda_initialize()
304 	write_mda_b(25, 0x06);		/* vertical displayed */  in mda_initialize()
305 	write_mda_b(25, 0x07);		/* vertical sync pos */  in mda_initialize()
307 	write_mda_b(2,  0x08);		/* interlace mode */  in mda_initialize()
308 	write_mda_b(13, 0x09);		/* maximum scanline */  in mda_initialize()
309 	write_mda_b(12, 0x0a);		/* cursor start */  in mda_initialize()
310 	write_mda_b(13, 0x0b);		/* cursor end */  in mda_initialize()
312 	write_mda_w(0x0000, 0x0c);	/* start address */  in mda_initialize()
313 	write_mda_w(0x0000, 0x0e);	/* cursor location */  in mda_initialize()
316 	outb_p(0x00, mda_status_port);  in mda_initialize()
317 	outb_p(0x00, mda_gfx_port);  in mda_initialize()
325 	mda_vram_len  = 0x01000;  in mdacon_startup()
326 	mda_vram_base = (u16 *)VGA_MAP_MEM(0xb0000, mda_vram_len);  in mdacon_startup()
328 	mda_index_port  = 0x3b4;  in mdacon_startup()
329 	mda_value_port  = 0x3b5;  in mdacon_startup()
330 	mda_mode_port   = 0x3b8;  in mdacon_startup()
331 	mda_status_port = 0x3ba;  in mdacon_startup()
332 	mda_gfx_port    = 0x3bf;  in mdacon_startup()
357 	c->vc_complement_mask = 0x0800;	 /* reverse video */  in mdacon_init()
382 	u16 attr = 0x0700;  in mda_convert_attr()
389 	if (ch & 0x0800)	attr = 0x7000;	/* reverse */  in mda_convert_attr()
390 	else if (ch & 0x0400)	attr = 0x0100;	/* underline */  in mda_convert_attr()
392 	return ((ch & 0x0200) << 2) | 		/* intensity */   in mda_convert_attr()
393 		(ch & 0x8000) |			/* blink */   in mda_convert_attr()
394 		(ch & 0x00ff) | attr;  in mda_convert_attr()
404 	 *	Bit 0..1 : intensity (0..2)  in mdacon_build_attr()
419 	for (; count > 0; count--) {  in mdacon_invert_region()
420 		scr_writew(scr_readw(p) ^ 0x0800, p);  in mdacon_invert_region()
435 	for (; count > 0; count--) {  in mdacon_putcs()
466 			outb_p(0x00, mda_mode_port);	/* disable video */  in mdacon_blank()
508 		scr_memmovew(mda_addr(0, t), mda_addr(0, t + lines),  in mdacon_scroll()
510 		scr_memsetw(mda_addr(0, b - lines), eattr,  in mdacon_scroll()
515 		scr_memmovew(mda_addr(0, t + lines), mda_addr(0, t),  in mdacon_scroll()
517 		scr_memsetw(mda_addr(0, t), eattr, 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()