19  * mode codes:  0  nybble reads, 8-bit writes
26 #define j44(a, b)  (((a >> 3) & 0x07) | ((~a >> 4) & 0x08) | \
27 		    ((b << 1) & 0x70) | ((~b) & 0x80))
29 #define P1	w2(5);w2(0xd);w2(5);w2(4);
34  * cont = 0 - access the IDE register file
37 static int  cont_map[2] = { 0x20, 0x40 };
45 	w0(0x81); P1;  in dstr_read_regr()
47 		w0(0x11);  in dstr_read_regr()
53 	case 0:  in dstr_read_regr()
57 		w0(0); w2(0x26); a = r0(); w2(4);  in dstr_read_regr()
62 		w2(0x24); a = r4(); w2(4);  in dstr_read_regr()
73 	w0(0x81); P1;  in dstr_write_regr()
75 		w0(0x11);  in dstr_write_regr()
81 	case 0:  in dstr_write_regr()
95 		w0(0xff); w2(0xc); w2(4);		\
96 		w0(0xaa); w0(0x55); w0(0); w0(0xff);	\
97 		w0(0x87); w0(0x78);			\
99 	} while (0)
105 	w2(4); CCP(0xe0); w0(0xff);  in dstr_connect()
110 	CCP(0x30);  in dstr_disconnect()
119         w0(0x81); P1;  in dstr_read_block()
121 		w0(0x19);  in dstr_read_block()
124 	P2; w0(0x82); P1; P3; w0(0x20); P1;  in dstr_read_block()
127 	case 0:  in dstr_read_block()
128 		for (k = 0; k < count; k++) {  in dstr_read_block()
135 		w0(0);  in dstr_read_block()
136 		for (k = 0; k < count; k++) {  in dstr_read_block()
137 			w2(0x26);  in dstr_read_block()
139 			w2(0x24);  in dstr_read_block()
144 		w2(0x24);  in dstr_read_block()
145 		for (k = 0; k < count; k++)  in dstr_read_block()
150 		w2(0x24);  in dstr_read_block()
151 		for (k = 0; k < count / 2; k++)  in dstr_read_block()
156 		w2(0x24);  in dstr_read_block()
157 		for (k = 0; k < count / 4; k++)  in dstr_read_block()
168 	w0(0x81); P1;  in dstr_write_block()
170 		w0(0x19);  in dstr_write_block()
173 	P2; w0(0x82); P1; P3; w0(0x20); P1;  in dstr_write_block()
176 	case 0:  in dstr_write_block()
178 		for (k = 0; k < count; k++) {  in dstr_write_block()
186 		w2(0xc5);  in dstr_write_block()
187 		for (k = 0; k < count; k++)  in dstr_write_block()
189 		w2(0xc4);  in dstr_write_block()
192 		w2(0xc5);  in dstr_write_block()
193 		for (k = 0; k < count / 2; k++)  in dstr_write_block()
195 		w2(0xc4);  in dstr_write_block()
198 		w2(0xc5);  in dstr_write_block()
199 		for (k = 0; k < count / 4; k++)  in dstr_write_block()
201 		w2(0xc4);  in dstr_write_block()
212 		 "DataStor EP2000 at 0x%x, mode %d (%s), delay %d\n",  in dstr_log_adapter()