Description: 8255 parallel communication (spontaneous self-closing), set 8253 counter 0 work, to the 8253 counter 0 to send the initial value to the 8251 control port to send 3 0 control word sent to the 8251 to allow it to send and receive
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8255\8255
....\8255.bak
....\8255.c
....\8255.hex
....\8255.lnp
....\8255.LST
....\8255.M51
....\8255.OBJ
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8255
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