I am using 89c51.
In ASM when I use the command to access the direct address, in some cases its work perfectly but in some case its didn’t work
When I use this command
MOV 80H, #0d
( 80H is the direct address of “Port0†)
Its work perfectly But when I use this command
MOV A0H, #0d
( A0H is the direct address of “Port1†)
Its didn’t work.
I think, because this command is start with Alphabet (A0H) and first one is start with numeric (80H)