A PC is powered on and begins POST. The PC takes a long time when scanning for drives. The BIOS reports no hard drive can be found but the CD-ROM is identified. The technician knows that there are two hard drives on the primary EIDE controller and a CD-ROM on the secondary EIDE controller.Which of the following is the MOST likely cause of the problem?()
A. Both hard drives have the master jumper in place.
B. One hard drive is set as master and the other slave.
C. The hard drive data cable is reversed.
D. Both hard drives have the cable select jumper in place.
第1题:
芯片8255A的端口A和端口B都工作在方式1输入时,端口C中可单独作为输入/输出的是
A.PC0、PC1
B.PC0、PC7
C.PC3、PC7
D.PC6、PC7
第2题:
芯片8255A的端口A工作在方式2,端口B工作在方式0时,端口C中可单独作为输入/输出的是
A.PC0、PC1、PC2
B.PC0、PC1、PC7
C.PC1、PC3、PC7
D.PC1、PC6、PC7
第3题:
8255A的端口A工作在方式1输入时,C口的()是空闲的。
A.PC4、PC5
B.PC5、PC6
C.PC6、PC7
D.PC3
第4题:
芯片8255A的端口A工作在方式1输入时,端口C中被用作端口A的应答信号的是
A.PC3、PC4、PC5
B.PC0、PC1、PC2
C.PC2、PC3、PC4
D.PC4、PC5、PC6
第5题:
1、8255A的端口A工作在方式1输入时,C口的()是空闲的。
A.PC4、PC5
B.PC5、PC6
C.PC6、PC7
D.PC2、PC3
第6题:
8、8255A工作在方式1输入时,() 引脚可以作为数据传送使用。
A.PC6和PC5
B.PC5和PC4
C.PC7和PC6
D.PC7和PC3