How can I print the content of an address and register in assembly 8086?

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x86

assembler

Let's take for eg. the address 010h and register DS.

How can i access their values?

I have a function that prints numbers as a binary code ( because that's what i want ). I want to print the content as a binary and decimal code. Leave alone the decimal code, i will figure that out later.

How can i access the value at the address 010h? What about the value of the register DS?
I've searched the whole internet but... still i can't figure it out.

What I have tried:

This function only prints a number in binary. Insead of 010h it should be the content of the address 010h...

mov bl, 010h
mov cx, 8
print: mov ah, 2   ; print function.
       mov dl, '0'
       test bl, 10000000b  ; test first bit.
       jz zero
       mov dl, '1'
zero:  int 21h
       shl bl, 1
loop print
; print binary suffix:
mov dl, 'b'
int 21h