Real mode assembly III: Difference between revisions

==Timing: Fun in a Few Interrupts==

 

xor ax,ax

int 1Ah

 

That little sprig of code grabs the timer ticks since midnight in CX:DX. It's a great seed for generating random numbers. Think what would happen if you threw in some things like this:

 

ror dx,2

shr cx,3

xchg dl,dh

 

You could use them in conjunction with some other instructions (think multiplying, adding, subtracting, etc.) to really create a random number.