pentium uart problems

why cant i get interrupts from a 16550a uart on pentium?


Comments

  • : why cant i get interrupts from a 16550a uart on pentium?


    maybe Interrupt Enable Register isn't set? or

    it could be blocked on PIC.. perhaps there

    is no uart in the machine. in other words,

    show us some code.




  • : why cant i get interrupts from a 16550a uart on

    pentium?




    I have heard that word "uart" often lately. I am

    very new to assembler. If you have the time please

    what is a uart?







  • Dear Edward,

    UART is Universal Ansynchronous Receiver Transmitter. It's provide the serial interfacing between PC and external serial device (e.g. modem). For complete understanding of UART and it's function, you should learn the hardware of UART and its programming.

    Try this book: The 8086/8088 Family: Design, Programming, and Interfacing, by John Uffenbeck.

    This book cover the topic about UART, 8086/8088 architecture, its addressing mode, etc. Also the main memory system, basic input/output, and data communication standard.

    This book will be good for the beginner like you.



    Dear ws_rami,

    I know about the 8255 PPI, but I am new on 16550.

    I couldn't help you at this time, Sorry.


    Regards,

    Junisan.


    : : why cant i get interrupts from a 16550a uart on

    : pentium?


    :

    : I have heard that word "uart" often lately. I am

    : very new to assembler. If you have the time please

    : what is a uart?









  • : : : why cant i get interrupts from a 16550a uart on

    : : pentium?


    Have you set bit 3 low in the Modem Control Register?







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