How to read Assembly

Can anybody help me to explain the following sequence ? I only had some expericence in coding x86 Assembly.

#pragma asm
CLR TR0
MOV A,#K_Timer0IntervalCompLo
ADD A,TL0
MOV TL0,A
MOV A,#K_Timer0IntervalCompHi
ADDC A,TH0
MOV TH0,A
NOP
NOP
NOP
NOP
SETB TR0
#pragma endasm

Thanks.

EricLin
eric.yc.lin@liteon.com