磁盘格式化有两个过程,分别是()和()。软磁盘的磁道格式化有硬分...
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在工作方式0下计数器是由TH的全部8位和TL的5位组成,因此其计...
Monday, September 12, 2022
Monday, September 12, 2022
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使用DMA控制器8237A传输一个字节需要多少时间?受那些因素影...
Thursday, September 15, 2022
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在微机系统中,实现模块(部件)之间相互连接的总线称为()。...
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
软件与硬件的等价性原理说明软硬件在功能、性能和成本等方面是等价的...
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可以将P1口的低4位全部置高电平的表达式是()A、P1=0x0fB、P1〡=0x0fC、P1^=0x0fD、P1=~P1...
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单片8259A能够管理多少级可屏蔽中断?若用3片级联能管理多少级...
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通常8088 CPU在()时刻采样READY信号,若无效在T3和T4之间插入Tw。A、T3下降沿B、T2上升沿C、T3上升沿D、T4下降沿...
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8051单片机中有()个()位的定时/计数器,可以被设定的工作方...
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对一个段进行访问,必须将这个段的描述符装入到段寄存器中。...
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8086/8088工作于最小方式下,有两条中断请求信号INTR和...
Monday, September 12, 2022
Monday, September 12, 2022
Monday, September 12, 2022
Thursday, September 15, 2022