[A83] Re: "forget" ret with calls ?

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: "forget" ret with calls ?
From: "Dan Weiss" <dwedit@hotmail.com>
Date: Fri, 28 Dec 2001 14:06:09 -0600
Reply-To: assembly-83@lists.ticalc.org


To forget a single call, just use POP.

POP AF, pop hl

They all work, just pick the registers you don't care about.


But if you want to return to the TIOS from anywhere, you should just save 
the stack pointer:

  ld (Quit+1),sp

and make a quit label to jump to.

Quit:
  ld sp,0000  ;self modify code
  ret



>Is it possible to make the calc "forget" it was busy doing a call, so that
>when a ret command is given in a call the program returns to the TI-OS
>rather than returning to the place where the call was made?


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