Int 2F Fn 1505 - Cd-rom - Read Vtoc [d] AX = 1505h ES:BX -> 2048-byte buffer CX = drive number (0=A:) DX = sector index (0=first volume descriptor,1=second,...) Return: CF set on error AX = error code (15=invalid drive,21=not ready) CF clear if successful AX = volume descriptor type (1=standard,FFh=terminator,0=other)