intel 8085 microprocessor and 8155 PIA

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reggea07

Joined Aug 8, 2011
4
http://forum.allaboutcircuits.com/[URL=http://imageshack.us/photo/my-images/543/electr.jpg/][IMG]http://img543.imageshack.us/img543/9710/electr.jpg[/IMG][/URL]%20%20Uploaded%20with%20 Uploaded with ImageShack.us
tester circuit
the operation of the Ic tester is follows:
*wait until the push-button switch is pressed
*when the push-button is pressed, debounce the switches contacts by delaying to read swicth output
*Send a logic 0 0
0 1
1 0
1 1
to gate inputs
*read gate outputs 1
0
0
0
*read gate outputs . if all the gate outputs are right , assume that the gate is working and turn ON the green led
otherwise assume that the chip is faulty and turn On the red led

Design Hardware and write software (assembly language 8085 micro)
 
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