[A83] Re: call, stack adresses and free space

To: <assembly-83@lists.ticalc.org>
Subject: [A83] Re: call, stack adresses and free space
From: "Ronald Teune" <rtwolf@gmx.net>
Date: Wed, 22 Aug 2001 21:53:05 +0200
Reply-To: assembly-83@lists.ticalc.org


>When you make a call, it's more like this:
>
>push pp
>jp xxxx
>
>Likewise, a ret is like this:
>
>pop <rr> ;16 bit register
>jp <rr>
>
>So, if you do something like this:
>
>ld hl,bob
>push hl
>ret

Hey, that explains much! Like, when you don't use the 'official' sp address,
and ret at the end of your program, the calc crashes.

>it would be like
>
>jp bob
>
>At 05:20 PM 8/20/2001 -0400, you wrote:
>
>>Hello everyone,
>>I've got a few questions for you:
>>
>>-Could anyone tell me how the adress a call is made from is stored?
>>-Where I can find that information?
>>-How much, if any, space is reserved for this?
>>-Same questions for numbers you push onto the stack.
>>
>>-May I assume that the free memory you've got on your calc is one line of
>>bytes, running up from $9327 to where your first program is stored?
>>
>>These are all TI-83 questions. Thanks.
>
>
>