Assembly variable declaretion ?

[Jacky1]

Hi

I would like someone to check what am doing

1- Declare a 4-byte variable in a relocatable segment of internal directly
addressable data memory.

x SEGMENT data
              RESG x 
              x: DS  4

2- Declare a 2-byte variable in an absolute segment of internal directly
addressable data memory beginning at 0300H.

DSEG   at  0300H
    m: DB  2

3- Declare a 1-byte variable in a relocatable segment of indirectly addressable
internal memory beginning at 60H

y SEGMENT idata
              RESG y 
              y: DS  1

but I don't know how to set the beginning AT 60h

4- Set the value of the part 1 to 101h

mov x, #101h

Thanks in advance