Date   : Tue, 24 Nov 2009 15:55:41 +0000
From   : rs423@... (Mick Champion)
Subject: Quine

Ian Stocks wrote:
> Mick Champion wrote:
>   
>> Sorry, I should have done PLP there as opposed to PLA. So if I wanted to 
>> save A and its flags and do something else
>>
>> PHA
>> PHP
>> //do other code
>> PLA
>> PLP
>>
>> ?
>>     
>
> Nope, think of a stack of plates, the last one you pushed onto the pile 
> will be the first one you pop off the pile. So the push and pop need to 
> be nested.
>
> PHA
>    PHP
>      //do other code
>    PLP
> PLA
>   
Got you! So a dodgy sub-routine could plant something else in the stack 
and cause problems if it then leaves it there.


Cheers,


Mick