I am using keil ver 6.12 and it does not support the newer chip AT89S52. All i want is to transfer my written program into it and do not realy requires the the functions provided in upgrading the software to Ver 7. Is there any alternative other than upgrading?
The instruction set did not change between these MCUs, so the compiler will produce compatible code. The 'S52 may have additional SFRs, but you can edit the SFR header file without upgrading.