32  * cont =  1   IDE control registers
43 	case 1:  in epat_write_regr()
45 		w0(0x60+r); w2(1); w0(val); w2(4);  in epat_write_regr()
64 		w0(r); w2(1); w2(3);  in epat_read_regr()
67 	case 1:  in epat_read_regr()
68 		w0(0x40+r); w2(1); w2(4);  in epat_read_regr()
72 		w0(0x20+r); w2(1); w2(0x25);  in epat_read_regr()
82 	return -1;	/* never gets here */  in epat_read_regr()
87 	int  k, ph, a, b;  in epat_read_block()  local
92 		w0(7); w2(1); w2(3); w0(0xff);  in epat_read_block()
94 		for (k = 0; k < count; k++) {  in epat_read_block()
95 			if (k == count-1)  in epat_read_block()
103 			buf[k] = j44(a, b);  in epat_read_block()
104 			ph =  1 - ph;  in epat_read_block()
109 	case 1:  in epat_read_block()
110 		w0(0x47); w2(1); w2(5); w0(0xff);  in epat_read_block()
112 		for (k = 0; k < count; k++) {  in epat_read_block()
113 			if (k == count - 1)  in epat_read_block()
117 			buf[k] = j53(a, b);  in epat_read_block()
118 			ph = 1 - ph;  in epat_read_block()
124 		w0(0x27); w2(1); w2(0x25); w0(0);  in epat_read_block()
126 		for (k = 0; k < count - 1; k++) {  in epat_read_block()
128 			buf[k] = r0();  in epat_read_block()
129 			ph = 1 - ph;  in epat_read_block()
132 		buf[count - 1] = r0();  in epat_read_block()
138 		for (k = 0; k < count - 1; k++)  in epat_read_block()
139 			buf[k] = r4();  in epat_read_block()
141 		buf[count - 1] = r4();  in epat_read_block()
147 		for (k = 0; k < count / 2 - 1; k++)  in epat_read_block()
148 			((u16 *)buf)[k] = r4w();  in epat_read_block()
151 		buf[count - 1] = r4();  in epat_read_block()
157 		for (k = 0; k < count / 4 - 1; k++)  in epat_read_block()
158 			((u32 *)buf)[k] = r4l();  in epat_read_block()
159 		for (k = count - 4; k < count - 1; k++)  in epat_read_block()
160 			buf[k] = r4();  in epat_read_block()
162 		buf[count - 1] = r4();  in epat_read_block()
170 	int ph, k;  in epat_write_block()  local
174 	case 1:  in epat_write_block()
176 		w0(0x67); w2(1); w2(5);  in epat_write_block()
178 		for (k = 0; k < count; k++) {  in epat_write_block()
179 		  	w0(buf[k]);  in epat_write_block()
181 			ph = 1 - ph;  in epat_write_block()
187 		for (k = 0; k < count; k++)  in epat_write_block()
188 			w4(buf[k]);  in epat_write_block()
193 		for (k = 0; k < count / 2; k++)  in epat_write_block()
194 			w4w(((u16 *)buf)[k]);  in epat_write_block()
199 		for (k = 0; k < count / 4; k++)  in epat_write_block()
200 			w4l(((u32 *)buf)[k]);  in epat_write_block()
236 		w0(0); w2(1); w2(4);  in epat_connect()
250 	w0(0); w2(1); w2(4); /* Idle into SPP */  in epat_connect()
252 		w0(0); w2(1); w2(4); w2(0xc);  in epat_connect()
274 	int k, j, f, cc;  in epat_test_proto()  local
285 		for (k = 0; k < 256; k++) {  in epat_test_proto()
286 			WRi(2, k ^ 0xaa);  in epat_test_proto()
287 			WRi(3, k ^ 0x55);  in epat_test_proto()
288 			if (RRi(2) != (k ^ 0xaa))  in epat_test_proto()
296 	WR(0x13, 1); WR(0x13, 0); WR(0xa, 0x11);  in epat_test_proto()
299 	for (k = 0; k < 256; k++) {  in epat_test_proto()
300 		if ((scratch[2 * k] & 0xff) != k)  in epat_test_proto()
302 		if ((scratch[2 * k + 1] & 0xff) != 0xff - k)  in epat_test_proto()
309 		pi->port, pi->mode, cc, e[0], e[1], f);  in epat_test_proto()
311 	return (e[0] && e[1]) || f;  in epat_test_proto()
335 	.default_delay	= 1,
336 	.max_units	= 1,
350 	epatc8 = 1;  in epat_init()