i/o

  1. K

    How do I connect multiple 8255s to an 8085?

    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?
  2. E

    Upgrading Old Semiconductor Equipment??

    Hi Everyone, I need you all feedback/opinions about what could be the best way to update old Semiconductor Equipment. Currently our Equipment runs using the OEM SW base on windows and has a determined amount of digital/analogs inputs that we can monitor (Essentially we have used them all) and...
  3. nikascom

    I/O

    Hello. I have questions about implementation of I/O. When a CPU reads/writes using IN or OUT, all data is delivered to devices (their registers or memory) directly. How are port address divided between devices? And how is this data delivered to a device (are there any agreements)?
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