Language learning Note (c) register (memory Access)

3.1 Storage of in-memory words
Font data with byte type data (the former is a byte, two 16-bit number)
Any two contiguous memory units, N and n+1, can be viewed as two memory units or as high-order byte units and low-bit byte units in a word cell with n

3.2DS and Address
DS Register: The segment address that is typically used to store the data to be accessed
MOV bx,1000h
MOV ds,bx
MOV al,[0]
The above three instructions will be in 10000H (1000:0) of the data unique in AL
MOV two kinds of functions:
Sending data between registers
To feed the contents of one register into another register

MOV register name, memory unit address
[...] ：... Represents an offset address
The DS above gives the segment address, so [0] gives the offset address is enough

The data of the register is fed into the internal deposit cell.
MOV bx,1000h
MOV ds,bx
mov [0],al

3.3-word transfer

3.4mov, add, Sub
MOV (ADD/SUB) registers, data
MOV (ADD/SUB) registers, registers
MOV (ADD/SUB) registers, memory units
MOV (add/sub) internal deposit element, register
MOV segment register, register

3.5 Data Segments

3.6 Stacks
Last in, first out (8086 operations in words)
Push in stack: Push ax (put AX data on the stack) sp=sp-2
Pop out of stack: Pop ax (store top data in ax)
Segment register: SS put the top segment address of the stack
Register: SP put on top of stack offset address
Push Ds/ax/[0]
Pop es/ax/[2]

The segment address of the code is obtained from: CS
Segment address of the data from: DS get
The segment address of the stack from: SS obtains

3.10 Stack Segment