4 const char datac[] = {0,'b','w',0,'l'};
7 main(int argc, char** argv) {
8 ulong size, segsize, op, port;
17 case 'W': size = 2; break;
18 case 'L': size = 4; break;
19 case 'r': op = OREAD; break;
20 case 'w': op = OWRITE; break;
21 default: sysfatal("bad flag %c", ARGC());
23 if(op == -1) sysfatal("no operation selected");
24 if(argc < 3) sysfatal("no address, no segsize or no segment selected");
25 if(op == OWRITE && argc < 4) sysfatal("no data selected");
27 segsize = strtoul(argv[1], 0, 0);
28 port = strtoul(argv[2], 0, 0);
29 if(op == OWRITE) data = strtoul(argv[3], 0, 0);
31 seg = segattach(0, segment, 0, segsize);
32 if(seg == (uchar*)-1) sysfatal("segattach: %r");
36 case 1: *(uchar*)(seg+port) = data; break;
37 case 2: *(ushort*)(seg+port) = data; break;
38 case 4: *(ulong*)(seg+port) = data; break;
43 if(size >= 2) data |= seg[port+1] << 8;
44 if(size >= 4) data |= (seg[port+2] << 16) | (seg[port+3] << 24);
45 print("0x%ulx\n", data);