Remember in other words that a variable is the contents of a RAM memory location. The 8052 has two internal spaces DATA memory, and Indirect memory.

In a modern relocatable assembler, memory locations are allocated into memory Segments. The exact wording will depend on your assembler.

However, here is an example for illustration.

Mydata SEGEMENT DATA ;declare a space called ; MYDATA in internal data memory
My_idata SEGMENT Idata
;Declare a space in Idata too.

RSEG Mydata ;change into that defined space to declare allocations.

Myfirstvariable: DS 1
MySecondVaiable: DS 1

RSEG My_idata
An_indirect_variable:DS 1


CSEG ; Change to the code memory space

ORG 0000
JMP 30H

;Now start coding

MOV myfirstvariable,#22
MOV Mysecondvariable,#44

MOV @an_indirect_variable,#2

;etc etc


In other words, unless you are accessing XDATA mapped peripherals or something like that, you don't need to know WHERE the variables are, just as you never know in a HLL.

Steve