交通灯控制系统的设计和实验报告 8255、8259、8253芯片交通灯-Traffic light control system design and experimental report 8255,8259,8253 chip traffic lights

数字秒表的VHDL语言实现，由于系统定时器8253每秒中断18.2次,利用INT 1AH/00H取得中断次数(DX),得到54.945ms的定时单位。 -Digital stopwatch the VHDL language, because the system timer interrupt 18.2 times per second, 8253, made use of INT 1AH/00H interrupt number (DX), by 54.945ms timing uni