Day 23

Inputting Numbers

	Inputting numbers was asked for recently on the Win32ASM boards, I figured
I should mention it here.

Services Used

	We will use INT 21h, Function 1. INT 16h can also be used, it would probably
be better to use INT 16h, because it's a BIOS call (not dependant on DOS), but we'll use
INT 21h anyway...


The Code

	Here it is:

;--CODE START--;
	mov ah,1
	int 21h ; returns ASCII code in AL
	sub al,30h ; '1' the char, -30h will equal 1 (the number)
;--CODE END--;

This Day In Review

	Very simple. Although this only works with 1 digit numbers, there's no reason
why you can't write a subroutine to input longer numbers...

	Happy Coding!,
		- GbaGuy


Intro - Day 24