• C51 v4.01 under Win2000
    Hi, I have upgraded my PC from WinNT to Win2000. Now my compiler v4.01 doesn't work anymore. Failure message: Missing security device. But the dongle is found by the newer version v7.00 and the...
  • C51 under Vista
    I'n trying to use PK51 under Vista ( professionnal edition). After installing C51V8.12 under C: I notice that C51 always stops without any reason when compiling and return a code: 0xC0000005. ...
  • Problem with C51 under Windows 2000
    Is C51 v5.50 compatible with Windows 2000 ? When I try to run it, simple \keil\c51\bin> C51.EXE then compiler not work and not print any message, and system wait...
  • How the printf() function works?
    How the printf() function works? I have wrote a simple program to use the c51's function printf(). as belows: void main (void) { //initial_UART: SCON = 0x50; /* SCON: mode 1, 8-bit UART, ...
  • C51 Toolchain under Visual Studio IDE
    I like this message very much, ohh! what's pitiful! it's 2 years ago. but I really hope the writer or someone can send VS51.exe. thanks! My email zeeman2003@hotmail.com