读磁片磁区
读磁片磁区2009-12-17以前的dos版要读、写、格式化第0轨的第1个磁区,程式大致如下:char buffer[512];reg.x.dx=0 ; /* for drive a *reg.x.cx=0x0001 /* for boot sector */reg.x.bx=fp_off(buffer);sreg.es=fp_seg(buffer);resg.x.ax=0x0201; /* 02 for read, 03 for write ,05 ...