8052 data memory 128bytes or 256 byte?

Hello, i am using 8052 in my project and according to datasheet the data memory is 256 bytes but in my code if i exceed 128 bytes the code is not compiled do i need to use it as x data memory? ...
8052 data memory 128bytes or 256 byte?

Hello, i am using 8052 in my project and according to datasheet the data memory is 256 bytes but in my code if i exceed 128 bytes the code is not compiled do i need to use it as x data memory? ...
[C51]Bug report: signed char divided by power of 2

Bug fact: Following code cannot get right results. #include "SST89x5xxRD2.H" signed char x,y,z; void main() { x = -15; y = x / 4; z = x % 4; while(1); } y = -4 and z = -3, while y should...
[C51]Bug report: signed char divided by power of 2

Bug fact: Following code cannot get right results. #include "SST89x5xxRD2.H" signed char x,y,z; void main() { x = -15; y = x / 4; z = x % 4; while(1); } y = -4 and z = -3, while y should...
upper 128byte of 89S52

How to use upper 128byte of AT89S52. i.e. SFRs(80H to FFH) Address indirectly with KEIL C51 for general purpose which are not in use. They are directly addressable only as SFR. according to datasheet...