From 0f6a98751a77d28091f7b884f27cfc5b87c0caa3 Mon Sep 17 00:00:00 2001
From: Irmen de Jong <irmen@razorvine.net>
Date: Sun, 2 Jul 2023 06:13:22 +0200
Subject: [PATCH] tiny optimization

---
 examples/cx16/pcmaudio/stream-wav.p8 | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/examples/cx16/pcmaudio/stream-wav.p8 b/examples/cx16/pcmaudio/stream-wav.p8
index 6de700d4b..ca07d8293 100644
--- a/examples/cx16/pcmaudio/stream-wav.p8
+++ b/examples/cx16/pcmaudio/stream-wav.p8
@@ -189,8 +189,7 @@ interrupt {
             ldx  #4
 -           ldy  #0
 -           lda  (cx16.r0),y
-            sec
-            sbc  #128       ; convert to signed
+            eor  #$80       ; convert to signed 8-bit
             sta  cx16.VERA_AUDIO_DATA
             iny
             bne  -