[A83] Re: advanced stack-stuff

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: advanced stack-stuff
From: "Dan Weiss" <dwedit@hotmail.com>
Date: Tue, 18 Dec 2001 15:01:03 -0600
Reply-To: assembly-83@lists.ticalc.org


STUPID STACK EXAMPLE THAT'S PROBABLY CONFUSING AS HELL:


Code1:
  ld hl,4
  push hl     ;Stack: 4
  call Code2  ;Stack: 4, [return]
  pop hl
  ret

Code2:
  pop hl  ;Stack: 4
          ;hl= [return]
  pop de  ;Stack: Empty
          ;de= 4
  ld de,Code3
  push de ;Stack: Code3
  ret     ;Ret returns to Code3, which was just pushed on the stack

Code3:
  ld de,4096  ;Stack: Empty
  push de     ;Stack: 4096,
  push hl     ;Stack: 4096, [return]
  ret         ;Returns way back to the first call, with a different
              ;HL value...



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Follow-Ups:

[A83] Re: advanced stack-stuff

From: Ronald Teune <RTWolf@gmx.net>