I have interfaced 8255A with 8086. PortA (Mode 0) is defined as input and PortB (Mode 0) and PortC are defined as output. PC0 and and PC1 are set by BSR command. As well as, I have read PortA and send it to PortB using a loop. But it is not working. I have attached the Proteus file. The assembly...
Hi,
I am ok on connecting one 8255 i/o chip to an 8085 mpu with an 74138 3 to 8 decoder chip but I am fuzzy on how to connect multiple 8255s? Can somebody please enlighten me, thanks?
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