Analysis of debugging process

How is a program compiled in TASM?
The program translation is executed by TASM program tasm.exe. this program is loaded with help of command string
TASM[options] name of initial file [,name of object file] [,name of listing] [,name of file of cross-references]
or more simply
TASM[options] name of initial file, , ,
(gray-colored elements are not compulsory).
Example:
TASM /z/zi/n PRG0.asm,prg0.obj,prg0.lst,prg0.crf
or
TASM /z/zi/n PRG0.ASM, , ,

A listing file shows precisely how the assembler translates your source file into machine code. It’s a report of translation.
What is meant by listing file in assembly?

What are the main components (columns) of the program listing?
Program’s listing includes four components (colons):
1.Numbers of Assembler sentences;
2.Offsets of Instructions relatively the Segment beginning;
3.Machinery codes of instructions;
4.The initial text of the program.

Syntax
name SEGMENT [[align]] [[combine]] [[use]] [[‘class’]]
Statements
Statements
………………
Statements
Statements
name ENDS

Attribute of segment alignment (type of alignment). It informs the compiler, that it is necessary to provide an allocation of the segment beginning at the given border (it is important for simplification of access to the data). There are following permissible meanings of this attribute:
BYTE. In this case the segment may be allocated starting from an arbitrary address in the main memory;
WORD. In this situation the initial (base) address of the segment will be dividable by 2;
DWORD. The segment begins with an address dividable by 4;
PARA. The segment begins with an address dividable by 16;
PAGE. The segment begins with an address dividable by 256;
MEMPAGE. The segment begins with an address dividable by 4 Kbytes.

Attribute of segments combining (combining type). It informs the compiler, that it is necessary to combine segments of different modules, which have the same name. The default the combining is PRIVATE. Meanings of this attribute may be following:
PRIVATE. In this case the segment will not be united with other segments;
PUBLIC. It compels the compiler to unite all segments (with the same name) in one continues segment;
COMMON. In this case all the segments will overlay and use collectively (share) the memory (the size of such segment will be equal to the size of the segment with the largest area).
STACK. It determines a segment for the stack (there is some analogy with the PUBLIC).

Attribute of segment class (type of class). It is enclosed in inverted commas (‘’) string, which helps the compiler to determine an order of segments location during compilation a program, which consists from several modules