TITLE Copying an Array			(arrayCopy.asm)

COMMENT @

Write a program in assembly language that uses the following data and
constant declarations:

array DWORD 10h,20h,30h,40h,11h,12h,16h,14h,18h,22h,96h,44h,89h
	  DWORD 17h,94h,27h,16h,82h,33h,15h,21h,77h,73h,02h,12h,09h
arrayLen  = ($ - array) / 4

Step 1: Display the array in forward order, in hexadecimal format,
with a comma between each number. (You may have a trailing comma after
the last number.)

Step 2: Display the array in reverse order, in hexadecimal format,
with a comma between each number. (You may have a trailing comma after
the last number.)

Turn in a printed listing of your program, and a printout of the screen
when the program runs. To print a DOS window, select Edit > Mark from the
window's System menu (upper left corner). Drag the mouse over the text
you want to print, and press the Enter key. Open up a text editor
window and paste the Windows clipboard into the editor. Print the
file using the text editor's print command.

Required reading: All of Chapter 4, plus pp.137-147 in Chapter 5.
@

INCLUDE Irvine32.inc

.data
array DWORD 10h,20h,30h,40h,11h,12h,16h,14h,18h,22h,96h,44h,89h
	  DWORD 17h,94h,27h,16h,82h,33h,15h,21h,77h,73h,02h,12h,09h
arrayLen  = ($ - array) / 4

comma BYTE ",",0

.code
main PROC

; Step 1: display the array in forward order, in hexadecimal format.

	mov  esi,OFFSET array	; point to the array
	mov  ecx,arrayLen	; set loop counter
L1:	mov  eax,[esi]	; get integer from array
	call WriteHex	; write it in hexadecimal
	mov  edx,OFFSET comma	; display a comma
	call WriteString
	add  esi,TYPE array	; point to next array position
	loop L1

	call Crlf	; end the current line
	call Crlf	; display a blank line

; Step 2: display the array backwards

	mov  ecx,arrayLen	; set loop counter

L2:	sub  esi,TYPE array	; back up one position
	mov  eax,[esi]	; get integer from array
	call WriteHex	; write it in hexadecimal
	mov  edx,OFFSET comma	; display a comma
	call WriteString
	loop L2	; repeat the loop

	call Crlf	; end the current line
	call Crlf	; display a blank line
	call WaitMsg	; pause the screen display

	exit
main ENDP

END main