add intro line before touch registers

MEGA65 · Jan 12, 2021 · 608dd06 · 608dd06
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commit 608dd06
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diff --git a/appendix-45io27-registers.tex b/appendix-45io27-registers.tex
@@ -558,6 +558,7 @@ \section{Touch Panel Interface}
 primary touch event is also fed into the lightpen\index{light pen} input of the VIC-IV,
 and can be detected using the normal light pen registers of the VIC-IV.
 
+The registers for the touch panel interface are as follows:
 
 \input{regtable_TOUCH.MEGA65}