• C51S and movx/xdata
    Since Keil (as opposed to some other compilers) do not supply the library in source, I have a question: I am tasked with debugging some glitches in a very strange design: External memory is used and...
  • XDATA
    Is it possible to access particular bit in xdata memory space without changig other bits' values (eg using ^).
  • Copy xdata to xdata
    How to copy array xbyte memory from one address(xdata) to another(xdata address) and use autoincrement DPTR to make it faster in Cx51? I have selected "use multiply DPTR register" in projects for target...
  • c51: xdata RAM starting at 0x8000 and reentrant
    Hello, Im porting our code to a "8051" harware architecture where the external CODE is placed from 0x0000 to 0x7fff. XDATA RAM is placed from 0x8000 to 0x83ff. I have to use reentrant functions....
  • How can I optimize the xdata access with C51
    Hi there! I need to optimize the accessing the xdata memory (the speed) with C51. I am sending some files via modem and the transmission could be a bit faster. At present, I am reaching a transmission...