74LS393 and 74LS393 used Intel8253 interruption of the application of the experimental box 8MHz clock frequency to deal with less than 2MHz gain ￠ of the clock signal and clock signal input to the Intel8253 ￠ a channel C. Requirements of channel C of the output signal as Intel8259 maskable interrupt request can be IRQ2, allows the CPU interrupt once every 2 seconds, interrupt procedure will interrupt the use of a binary number of 8 in the light-emitting diode shown

Packet : 103244867experiment4.rar filelist
experiment4.asm

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