Day 6

Outputting Text Strings

	Yep, like a printf().

A String Variable
	Just like a normal one:

		var1 db "Hello$"  ; you can use either ' or " for this.

	Note that if you use var1 like we've seen before, you'll be changing the He if
you use 16bits (AX,BX,CX,DX) or just H if you use the 8bit parts (AH,BH,AL,BL, etc...).
What you really should use var1 for is creating a pointer to the start of the string,
which in DOS ends with a '$' (a peso sign, the official United State of America dollar has
2 lines through the 'S', I think, but I'm not sure). This means that you can't output
a $ with this method, use the character output to do a $.

Doing it
	If this title means more to you than just outputting text, then you do way to much
programming, close this window and go outside and find a hooker or something...

	Anyway, here's the code:

;;---CODE START---;;
	jmp start   ; the JuMP instruction, skip over the data so it's not executed by the CPU.
	msg db "Hello faithful reader!$"
start:
	mov dx,offset msg  ; the DOS Service function 9 expects the pointer to the text in DX.
	mov ah,9  ; DOS Service function 9 outputs text.
	int 21h   ; call DOS

	mov ah,4Ch
	int 21h   ; call the DOS Service function that exits the program.
;;---CODE END---;;

Very easy. Have fun! :)

This Day In Review

	How about comparing things and jumping places!

	Have fun!,
		-Mike H a.k.a GbaGuy


Intro - Day 7
Note that I do not support prostitution and it is illegal in the USA.