extern long bios(); #define Lrwabs(a,b,c,d,e) bios(4,a,b,c,-1,e,d) char buf[512*63]; main() { int i; long recno; for (i = 0; i < 512*63; i++) { buf[i] = 0; } for (recno = 0x2L; recno < 0x152aaL; recno += 0x3fL) { Lrwabs(9, buf, 0x3f, recno, 2); } }