opcode of transfer from memory to register

Question

     Mov DL, [1000H] 

This is the code and i couldn't find how to write OPCODE

it's a transfer from memory to register and it use MOV keyword so

I looked INSTRUCTION SET

and I found that " 100010 dw oo rrr mmm disp "

so I made OPCODE in this format " 100010 11 oo 010 mmm disp "

I couldn't decide "oo" and "mmm" part

As I know it , we write a register code to mmm part and there is no register here.

What should I write to "oo" and "mmm" part ?

Answer 1

mov dl,[1000h]  ; -> 100010 11 oo 010 mmm disp  

Your opcode encoding mistakenly addresses the DX register. The correct encoding is 10001010b, 0001_0110b, 0000_0000b, 0001_0000b
So the mod field is 00b and the r/m field is 110b