• 89c51 port epansion with 8255 keil c
    I just found a more recent source code which isnt mine which uses the commands u used. They only work with the recent versions of Keil (after Microsoft bought Keil) because i have an older version and...
  • Re: 89c51 port epansion with 8255 keil c
    we had a good discussion abt 8255 ports and pins . thanks friends. but i have found the shortest way for solving my fundamental problem. and that is--> to use the switches in matrix form. i can use...
  • Writing to 8255 Ports using xdata
    Hi,I'm using 8051 microcontroller and am new to c51 coding.Somebody pls help me how to write to 8255 using c. Thanks, lina
  • Addressing 8255
    Hi, I have a Philips RD2 board with a memory mapped 8255 with ports A at 8000H, B at 8001H, C at 8002H and a control port at 8003H. How do I set up my defines so that I can just refer to these...
  • 8255 simulation
    Is it possible to simulate the 8255 by a plugin or anything else in keil µvision 2 ? Greetings Martin