关于8253制作秒表 其http://www.programsalon.com/upload_new.asp-on its 8253 production stopwatch http://www.programsalon.com/upload_new.asp

电子秒表，在硬件上实现电子秒表，主要用8279键盘/显示芯片，8259A中断控制器，8253定时/计数器以及8255A并行接口芯片-electronic stopwatch in electronic hardware stopwatch, mainly 8279 keyboard / Chip, 8259A interrupt controller, 8253 timer / counter and 8255A Parallel Interface Chip

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