C51 libs: Where is ?C?LSTKXDATA and friends documented?

I am trying to understand some disassembled code, and encounter instances of ?C?LSTKXDATA. Apparently, that function expects 4 bytes of data following the call instruction. And thus must adjust the stack...
C51 libs: Where is ?C?LSTKXDATA and friends documented?

I am trying to understand some disassembled code, and encounter instances of ?C?LSTKXDATA. Apparently, that function expects 4 bytes of data following the call instruction. And thus must adjust the stack...
friend i am doing a project on vehicle tracking system using gsm and gps ...

here while doing it i need the source code for serial.c ... kindly help
friend i am doing a project on vehicle tracking system using gsm and gps ...

here while doing it i need the source code for serial.c ... kindly help
Are you using RTX? Can you help me?

Hello, I have a major problem with RTX and Keil don't seem to be able to help (as they want a simple scenario to cause the problem, but I cannot give them the hardware of course. Maybe I can make...