From 20632681dd1263bdbd3953fcc07e5f017b86e548 Mon Sep 17 00:00:00 2001
From: nihilazo <nico@itwont.work>
Date: Wed, 2 Mar 2022 16:07:22 +0000
Subject: [PATCH] add bounds checking to moving selected patterns in song

---
 tracker.tal | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tracker.tal b/tracker.tal
index 70c936a..5dc26b3 100644
--- a/tracker.tal
+++ b/tracker.tal
@@ -86,9 +86,11 @@ RTN
   BRK
   &up
     POP
+    .tracker/selected-pattern LDZ #00 EQU ,&end JCN 
     .tracker/selected-pattern LDZ #01 SUB .tracker/selected-pattern STZ
     ,&end JMP
   &down
+    .tracker/selected-pattern LDZ #01 ADD #00 SWP #0004 MUL2 .kalama/module LDZ2 #0003 ( song length ) ADD2 LDA2 EQU2 ,&end JCN ( if we're off the end of the song, don't move )
     .tracker/selected-pattern LDZ #01 ADD .tracker/selected-pattern STZ
     ,&end JMP
   &end