Re: A83: Re: Where is...

To: assembly-83@lists.ticalc.org
Subject: Re: A83: Re: Where is...
From: benjamin99@juno.com (Alan C Johnson)
Date: Sat, 17 Oct 1998 20:35:21 -0500
Delivered-To: assembly-83-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-83@lists.ticalc.org


I have an example.  Suppose you wanted to convert a prog that stores a
lot of information in sfae  RAM areas to a program that uses writeback,
you could use it.  See below.  It would use say 500 bytes of SAVESSCREEN:

WORKSPACE	= SAVESCREEN	;You would delete this line
BlahBlah	= WORKSPACE
BlahBlah2	= WORKSPACE+1
...and so on...
Data		= WORKSPACE+499

...Program code...

Workspace:
 .ds 500

>
>I believe I used it in DStar to save the current game.
>Anyway, lets say I wanted to have an 8x8 game matrix and the levels 
>were
>stored at level_data. I could do:
>....
> ld bc,(current_level-1)
> ld hl,level_data-64
> ld de,64
>selectLevel:
> add hl,de
> djnz selectLevel
> ld bc,64
> ld de,matrix
> ldir
>....
>matrix:
> .ds 64
>
>Of course this would be stupid since I could just use a safe ram area 
>rather
>than wasting 64 bytes of the calculators memory, but just an 
>example...
>
>Joe Wingbermuehle
>http://www.usmo.com/~joewing/
>
>-----Original Message-----
>From: Jkhum98@aol.com <Jkhum98@aol.com>
>To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
>Date: Saturday, October 17, 1998 1:37 PM
>Subject: Re: A83: Re: Where is...
>
>
>>
>>
>>In a message dated 10/17/98 1:20:44 PM, joewing@usmo.com writes:
>>
>>>geez... I'm sending a lot today hehe
>>>
>>>.ds is define storage. It defines a storage space (the number you 
>put
>>>after it).
>>> .ds 500 would define 500 bytes (not necessarily 0 though!).
>>>
>>>Joe Wingbermuehle
>>>http://www.usmo.com/~joewing/
>>
>>What do you mean by this,  and where has it been used in any 
>programs, if I
>>may ask...? =)  Well, for ".db" or ".dw" it saves the _Value_ and 
>knows
>that
>>it should be 1 or 2 bytes long (respectively), right?  Well, for this 
>".ds"
>>thing, your saying that the number right after it is _How Much_ you 
>want to
>>store, but then where does the actual data go, directly after it?
>> --Jason K.
>>
>
>

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