Bootloader Startup.asm code Help

Hi, I'm starting learning 8051 mcu, came up with the startup code written in assembly. I have few things I need to know. Here is the sample startup source code of bootloader: My questions...
Bootloader Startup.asm code Help

Hi, I'm starting learning 8051 mcu, came up with the startup code written in assembly. I have few things I need to know. Here is the sample startup source code of bootloader: My questions...