Attachment #5967 for bug #13847

View | Details | Raw Unified | Return to bug 13847
Collapse All | Expand All




		v86int();
	    }
	    
	    if (cyl > 1023) {
	      static unsigned short packet[8];

	      /* Check for Extended READ */
	      v86.ctl = V86_FLAGS;
	      v86.addr = 0x13;
	      v86.eax = 0x4100;
	      v86.ebx = 0x55aa;
	      v86.edx = od->od_unit;
	      v86int();

	      if (v86.ebx == 0xaa55 && (v86.ecx & 1) == 1) {

		packet[0] = 0x10;
		packet[1] = x;
		packet[2] = VTOPOFF(xp);
		packet[3] = VTOPSEG(xp);
		packet[4] = dblk;
		packet[5] = dblk >> 16;
		packet[6] = 0;
		packet[7] = 0;
		/* build request  XXX support EDD requests too */
		v86.ctl = V86_FLAGS;
		v86.addr = 0x13;
		v86.eax = 0x4200;
		v86.ds = VTOPSEG(packet);
		v86.esi = VTOPOFF(packet);
		v86int();
		result = (v86.efl & 0x1);
		if (result == 0)
		  break;
	      }
	      result = 1;
	    } else {
	      /* build request  XXX support EDD requests too */
	      v86.ctl = V86_FLAGS;
	      v86.addr = 0x13;
	      v86.eax = 0x200 | x;
	      v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
	      v86.edx = (hd << 8) | od->od_unit;
	      v86.es = VTOPSEG(xp);
	      v86.ebx = VTOPOFF(xp);
	      v86int();
	      result = (v86.efl & 0x1);
	      if (result == 0)
		break;
	    }
	}
	
 	DEBUG("%d sectors from %d/%d/%d to %p (0x%x) %s", x, cyl, hd, sec - 1, p, VTOP(p), result ? "failed" : "ok");

Return to bug 13847

Lines 687-704 Link Here

(-)biosdisk.c (-11 / +46 lines)
687	v86int();	687	v86int();
688	}	688	}
689		689
690	/* build request XXX support EDD requests too */	690	if (cyl > 1023) {
691	v86.ctl = V86_FLAGS;	691	static unsigned short packet[8];
692	v86.addr = 0x13;	692
693	v86.eax = 0x200 \| x;	693	/* Check for Extended READ */
694	v86.ecx = ((cyl & 0xff) << 8) \| ((cyl & 0x300) >> 2) \| sec;	694	v86.ctl = V86_FLAGS;
695	v86.edx = (hd << 8) \| od->od_unit;	695	v86.addr = 0x13;
696	v86.es = VTOPSEG(xp);	696	v86.eax = 0x4100;
697	v86.ebx = VTOPOFF(xp);	697	v86.ebx = 0x55aa;
698	v86int();	698	v86.edx = od->od_unit;
699	result = (v86.efl & 0x1);	699	v86int();
700	if (result == 0)	700
		701	if (v86.ebx == 0xaa55 && (v86.ecx & 1) == 1) {
		702
		703	packet[0] = 0x10;
		704	packet[1] = x;
		705	packet[2] = VTOPOFF(xp);
		706	packet[3] = VTOPSEG(xp);
		707	packet[4] = dblk;
		708	packet[5] = dblk >> 16;
		709	packet[6] = 0;
		710	packet[7] = 0;
		711	/* build request XXX support EDD requests too */
		712	v86.ctl = V86_FLAGS;
		713	v86.addr = 0x13;
		714	v86.eax = 0x4200;
		715	v86.ds = VTOPSEG(packet);
		716	v86.esi = VTOPOFF(packet);
		717	v86int();
		718	result = (v86.efl & 0x1);
		719	if (result == 0)
		720	break;
		721	}
		722	result = 1;
		723	} else {
		724	/* build request XXX support EDD requests too */
		725	v86.ctl = V86_FLAGS;
		726	v86.addr = 0x13;
		727	v86.eax = 0x200 \| x;
		728	v86.ecx = ((cyl & 0xff) << 8) \| ((cyl & 0x300) >> 2) \| sec;
		729	v86.edx = (hd << 8) \| od->od_unit;
		730	v86.es = VTOPSEG(xp);
		731	v86.ebx = VTOPOFF(xp);
		732	v86int();
		733	result = (v86.efl & 0x1);
		734	if (result == 0)
701	break;	735	break;
		736	}
702	}	737	}
703		738
704	DEBUG("%d sectors from %d/%d/%d to %p (0x%x) %s", x, cyl, hd, sec - 1, p, VTOP(p), result ? "failed" : "ok");	739	DEBUG("%d sectors from %d/%d/%d to %p (0x%x) %s", x, cyl, hd, sec - 1, p, VTOP(p), result ? "failed" : "ok");