Hello forums, I started playing with a coding the 8051 after a long search for an assembly language to learn and it seemed like the way coolest one. I looked around a bit for how to do this but I probably just couldn't word it correctly; what I'm trying to do is fill memory locations 0x0200-0x05ff with a certain value, doesn't matter what it is. If i had to just do something like fill locations 0x200-0x2ff it would be easy as I could just use:
mov r0, # 100h mov dptr, # 200h a: mov a, #27 mov @dptr, a inc dptr djnz r0, a
but what is the best way to do it for more than 256 bytes?
Answers on a postcard please.
It seams to me that mov r0, #100h is the same as clr r0 ... there is no clr r0
It seams to me that mov r0, #100h is the same as ... mov r0, #0 it is
It does not set/reset any flag. The flags are affected only after any arithmetic or logical operations and not after any data transfer instruction.
It seams to me that mov r0, #100h is the same as ... mov r0, #0 I think that the OP didn't know this while writing the code. He just wrote the instruction and it turned out to be correct. :|