• Xdata
    Hi Can someone tell me how does XDATA works? I got the code below but i do not understand how can a simple code like #define Port_D XBYTE [0xFFA0], define Port D and what input or output goes to which...
  • Internal XDATA
    I have an existing design with external RAM mapped from 0000 and a lot of units manufactured. To rectify some intermittent errors in the original code, I need to gain a bit more RAM without modifying...
  • xdata space memory overlap
    Dear Sir, I am facing a problem with my specific address allocation of variables in memory.I am using Philips 89c51rd2 with external ram starting at address 0xc000 with 4kb memory.i need to assign variables...
  • external reference to abs xdata
    I am trying to come up with a method for defining absolute (MMIO) addresses once in my universal .h file. DATAACT id defined in one .c file only UX* is xdata unsigned char My attempt: #ifdef...
  • Generate Constant Variables in XDATA
    Hello, did everyone know how i can locate my const variables in XDATA memory. I want to generate the ?XC? const xdata memory prefix. Example : const xdata char test[]="asdc"; This data should...