I am using AT89C55WD, 40 pin DIP, in one of my project. I have connected 12Mhz crystal. It is 8051 variant. So inst time is 1us. Using Keil v4.72.9.0 & C compiler V9.50.0.0
I am programming in C. In one place I have use _nop_().When I saw its reference it showed in Keil folder file "intrins.h". But there it has reference only "extern void _nop_ (void);" There is no definition. I know it will something like "asm(Nop)". Not inetersted in its defination but in place where it is defined But I want to know like if function definition is not present in project folder & only it has project reference, then how do code builds?