Description: 8086,8255,8259 and 8254 by tectonic system of light control. 8255 of PA0, PA1, PA2 three DIP switches, DIP switches, through the closed state in the PB I decided to take on one of the eight indicator light flashes. Such as PA2, PA1, PA0 for 000 hours, PB0 on the indicator light flashes then the remaining light extinguish. Requirements flicker frequency of 10 times per second. 8259 address 20H located and 21H, 8255 address 60H ~ 63H, 8254 address 40H ~ 43H, the clock frequency of 50KHz, 8259 interrupt vector number is 70H and 71H. Try to design hardware to connect the circuit to fill in Interrupt Vector Table, the preparation of all the early the beginning of the procedure to complete the preparation of control procedures.
- [8254_TIMER] - DOS under the 8254 clock procedures He i
- [dianzibaojingqi] - Electronic alarm design is implemented o
- [com1(winio)] - Winio based on the Treasury, through the
- [TLK] - 8253,8255,8259 adopted to achieve the co
- [dzz] - Shows the design of a timing device, the
- [8254-Timer] - The Intel 8254 is a counter/timer device
- [clock] - The course is designed to use the three
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xt00.txt
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