[A83] Re: moving sprites

To: assembly-83@lists.ticalc.org
Subject: [A83] Re: moving sprites
From: "Dan Weiss" <dwedit@hotmail.com>
Date: Sat, 16 Mar 2002 12:16:22 -0600
Reply-To: assembly-83@lists.ticalc.org


Most sprite routines destroy the contents of the registers, so you need to 
push the registers, then pop them afterwards.  This little routine moves a 
sprite, and calls 'pushsprite', which pushes all the registers, then pops 
them after drawing the sprite.


ld ix,sprite
ld a,0
ld l,32
ld b,80
SpriteMoveLoop:
push bc
inc a
ld b,8
call PushSprite
call PushFastCopy
call PushSprite
pop bc
djnz SpriteMoveLoop

ret

PushSprite:
push af
push bc
push de
push hl
push ix
call ionPutSprite
popem:
pop ix
pop hl
pop de
pop bc
pop af

PushFastCopy:
push af
push bc
push de
push hl
push ix
call ionfastcopy
jr Popem

Sprite:
.db %00111100
.db %01000010
.db %10110001
.db %10100001
.db %10000001
.db %10000101
.db %01000010
.db %00111100

I hope this works...


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Follow-Ups:

[A83] Re: moving sprites

From: "Ronald Teune" <rtwolf@gmx.net>