.model small
.stack 1024
.data                    ; data segment begins here
UserRam byte 256 dup (0) ; the next 256 bytes have a value of zero. The address of the 0th of these bytes can be referenced as "UserRam"

tempByte equ UserRam     ;this variable's address is the same as that of the 0th byte of UserRam
tempWord equ UserRam+2   ;this variable's address is the address of UserRam + 2
.code
start:
mov ax, @data
mov ds, ax

mov ax, @code
mov es, ax