ASCII Codes

The code for carriage return (CR) in the ASCII code is 0DH (13
decimal), the code for line feed (LF) is 0AH (10 decimal).

You can find tables of the complete ASCII code in most computer
reference books.  There is an ASCII table on page 632 of the
textbook (but there is a typo in the table -- the code labelled
"LT" is actually "LF").

			Boiler Plate Code

You will need to include the following lines of ``boiler plate''
in your assembly program:

public  msg

STACK   segment word stack 'STACK'
...
STACK   ends

data    segment word public 'DATA'
...
data    ends

code    segment byte public 'CODE'
	assume cs:code,ds:data
...
code    ends
	end     start


The SEGMENT and ENDS directives tell the linker which segment the
code or data is to be placed in.  PUBLIC tells the linker that
segments with the same name can be combined.  BYTE and WORD
specify the type of alignment desired. You should use the segment
names STACK, DATA and CODE.

The PUBLIC directive tells the assembler to pass the offset of
the given symbol to the linker.  This is required for any symbol
that is defined in one segment (e.g. DATA) and used in another
(e.g. CODE).  Add other variables (separated by commas) to the
public statement as required.

The ASSUME directive tells the assembler that the segment
registers CS and DS will contain the segment addresses of the
CODE and DATA segments respectively.  CS will be loaded
implicitly when the code is executed but DS must be initialized
explicitly by your code.