20  * mode codes:  0  nybble reads, 8-bit writes
25 #define j44(a, b)	(((a >> 3) & 0x0f) | ((b << 1) & 0xf0))
27 #define P1	w2(5);w2(0xd);w2(0xd);w2(5);w2(4);
31  * cont = 0 - access the IDE register file
34 static int  cont_map[2] = { 0x08, 0x10 };
43 	case 0:  in comm_read_regr()
44 		w0(r); P1; w0(0);  in comm_read_regr()
45 		w2(6); l = r1(); w0(0x80); h = r1(); w2(4);  in comm_read_regr()
49 		w0(r+0x20); P1;  in comm_read_regr()
50 		w0(0); w2(0x26); h = r0(); w2(4);  in comm_read_regr()
56 		w3(r+0x20); (void)r1();  in comm_read_regr()
57 		w2(0x24); h = r4(); w2(4);  in comm_read_regr()
69 	case 0:  in comm_write_regr()
85 	w2(4); w0(0xff); w2(6);  in comm_connect()
86 	w2(4); w0(0xaa); w2(6);  in comm_connect()
87 	w2(4); w0(0x00); w2(6);  in comm_connect()
88 	w2(4); w0(0x87); w2(6);  in comm_connect()
89 	w2(4); w0(0xe0); w2(0xc); w2(0xc); w2(4);  in comm_connect()
94 	w2(0); w2(0); w2(0); w2(4);  in comm_disconnect()
104 	case 0:  in comm_read_block()
105 		w0(0x48); P1;  in comm_read_block()
106 		for (i = 0; i < count; i++) {  in comm_read_block()
107 			w0(0); w2(6); l = r1();  in comm_read_block()
108 			w0(0x80); h = r1(); w2(4);  in comm_read_block()
113 		w0(0x68); P1; w0(0);  in comm_read_block()
114 		for (i = 0; i < count; i++) {  in comm_read_block()
115 			w2(0x26);  in comm_read_block()
117 			w2(0x24);  in comm_read_block()
122 		w3(0x68); (void)r1(); w2(0x24);  in comm_read_block()
123 		for (i = 0; i < count; i++)  in comm_read_block()
128 		w3(0x68); (void)r1(); w2(0x24);  in comm_read_block()
129 		for (i = 0; i < count / 2; i++)  in comm_read_block()
134 		w3(0x68); (void)r1(); w2(0x24);  in comm_read_block()
135 		for (i = 0; i < count / 4; i++)  in comm_read_block()
148 	case 0:  in comm_write_block()
150 		w0(0x68); P1;  in comm_write_block()
151 		for (k = 0; k < count; k++) {  in comm_write_block()
159 		w3(0x48); (void)r1();  in comm_write_block()
160 		for (k = 0; k < count; k++)  in comm_write_block()
164 		w3(0x48); (void)r1();  in comm_write_block()
165 		for (k = 0; k < count / 2; k++)  in comm_write_block()
169 		w3(0x48); (void)r1();  in comm_write_block()
170 		for (k = 0; k < count / 4; k++)  in comm_write_block()
182 		 "DataStor Commuter at 0x%x, mode %d (%s), delay %d\n",  in comm_log_adapter()