Re: A86: Re: sprites

To: assembly-86@lists.ticalc.org
Subject: Re: A86: Re: sprites
From: Dux Gregis <assets@eden.rutgers.edu>
Date: Mon, 18 May 1998 22:37:56 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
References: <004401bd82cc$dd57cce0$ddf3ffd0@matt>
Reply-To: assembly-86@lists.ticalc.org


because each byte needs to be written to the next row (+16)

Matt2000 wrote:

> Why cant you do:
>
> ld hl, SpriteLocation
> ;de set?
> ld bc, 8
> ldir
>
> SpriteLocation:
>     .db %00000000
>     .db %00000000
>
> Later,
>     Matt
>
> >What's wrong with this bit of code?
> >
> >
> >;copy 8x8 sprite at hl to de
> >
> >copy_sprite:
> > ld bc,8                   ;sprite size
> > ld a,15
> >the_loop:
> > ldi
> > ret po                       ;return when bc is 0
> > add a,e
> > ld e,a                       ;make de point to next row
> > jr nc,the_loop
> > inc d                        ;add carry
> > jr the_loop
> >
> >

References:

A86: Re: sprites

From: "Matt2000" <matt2000@gte.net>