[51] question about the x51 xdata

[userx51]

I have a third party code with declarations, something like:

#define LastByte as 0x32
unsigned char xdata ArrayTwo[0x10]  _0x128_
Some where in the project I noticed:  ArrayTwo[LastByte] = ...

Is this possible?. How LastByte can go beyond 0x10?. It runs without a crash. I am not a x51 programmer for years.

 

[FvM]

Looks erroneous. But you need to inspect the linker memory map to predict what writing out of bounds actually does in this case. Unless the xdata memory usage is completely fixed in the design, the results may change between compilations.