论文部分内容阅读
1 在Intel公司的微处理器中为什么有SX和DX芯片之分这两种芯片在结构上有所不同,运行效率也不一样.在芯片内部,386SX和386DX一样,都是32位结构,处理32位数据并提供386芯片的所有功能.386芯片具有多用户操作存储管理和高速总线接口,具有完整的32位内部和外部数据总线,片内含有8个32位通用寄存器,指令系统提供8位、16位、32位数据类型,处理器直接寻址能力为4096M字节,时钟频率最高可达40MHz.在最多用户操作数达25个时,其速度仍可不低于Intel80286的速度,只要配以80287、80387协处理器、82384时钟发生器、8259可编程控制器及82256先进的DMA控制器,就可组成高级微机系统.运算速度可达(300～400)万次/秒.
1 in Intel’s microprocessor why the SX and DX chip points The two chips in the structure of different operating efficiency is not the same in the chip, 386SX and 386DX, are 32-bit structure, processing 32-bit data and offers all the features of the 386. The 386 chip features multi-user operational memory management and a high-speed bus interface with a complete 32-bit internal and external data bus with eight 32-bit general purpose registers on board and an 8- , 16-bit, 32-bit data type, processor direct addressing capacity of 4096M bytes, the clock frequency up to 40MHz. In the maximum number of user operations up to 25, the speed is still not lower than Intel80286 speed, 80287, 80387 coprocessor, 82384 clock generator, 8259 programmable controller and 82256 advanced DMA controller, can form an advanced microcomputer system. Operation speed up (300 ~ 400) million times / second.