Hi Alex,

whats your problem ?

"I know that my code is wrong..."

Nobody can look into your head to see, whats wrong on your code.



"... but there no C code in the AT89S8252 Primer"

If you not understand assembler and can convert it to C, you can use inline assembling.
But I think, assembler skills are absolutely needed for efficient and reliable C programming on microcontrollers.



Peter