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.

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