X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fsprite.S;h=d258d624929759151b0fe3bb8b8c61127f06601e;hb=8bec66098f3111e4b7c87361fd4142e94dcfeebd;hp=158aaace5b99b8df9c5c670c5bc5b6c93e8d4533;hpb=b789e37efab3baed9def2c1199d1cc5884e06ab5;p=mdlife

diff --git a/src/sprite.S b/src/sprite.S
index 158aaac..d258d62 100644
--- a/src/sprite.S
+++ b/src/sprite.S
@@ -8,11 +8,16 @@
 
 	.globl spr_submit
 spr_submit:
-	move.l spr_count, %d0
-	lsl.l #2, %d0			| 4 words per sprite
+	move.w spr_count, %d0
+	tst.w %d0
+	bne.s 0f
+	| if spr_count is zero, upload a single null sprite
+	addq.w #1, %d0
+0:	ext.l %d0
+	lsl.w #2, %d0			| 4 words per sprite
 	move.l %d0, -(%sp)
 	pea spr_shadow
-	pea 0xe000.w			| we placed the spirte table at e000
+	pea 0xd000.w			| we placed the spirte table at d000
 	jsr dma_systovram
 	addq.l #8, %sp
 	addq.l #4, %sp