diff --git a/2016/asm.slide b/2016/asm.slide
index 80c3bf3..65ca53e 100644
--- a/2016/asm.slide
+++ b/2016/asm.slide
@@ -43,33 +43,33 @@
 
 * IBM System/360
 
-.code asm/360.s
+.code asm/360.s.txt
 
 * Apollo 11 Guidance Computer
 
-.code asm/apollo.s
+.code asm/apollo.s.txt
 
 * PDP-10
 
-.code asm/pdp10.s
+.code asm/pdp10.s.txt
 
 (From the MIT PDP-10 Info file)
 
 * PDP-11
 
-.code asm/pdp11.s
+.code asm/pdp11.s.txt
 
 (From Unix v6 `as/as13.s`)
 
 * Motorola 68000
 
-.code asm/68000.s
+.code asm/68000.s.txt
 
 (From Wikipedia)             
 
 * CRAY-1
 
-.code asm/cray1.s
+.code asm/cray1.s.txt
 
 (From Robert Griesemer's PhD thesis)
 
@@ -221,37 +221,37 @@
 
 Look at the generated assembly for this simple program:
 
-.code asm/add.go
+.code asm/add.go.txt
 
 For each architecture, with some noise edited out:
 
 * 32-bit x86 (386)
 
-.code asm/386.s
+.code asm/386.s.txt
 
 * 64-bit x86 (amd64)
 
-.code asm/amd64.s
+.code asm/amd64.s.txt
 
 * 32-bit arm
 
-.code asm/arm.s
+.code asm/arm.s.txt
 
 * 64-bit arm (arm64)
 
-.code asm/arm64.s
+.code asm/arm64.s.txt
 
 * S390 (s390x)
 
-.code asm/s390x.s
+.code asm/s390x.s.txt
 
 * 64-bit MIPS (mips64)
 
-.code asm/mips64.s
+.code asm/mips64.s.txt
 
 * 64-bit Power (ppc64le)
 
-.code asm/ppc64le.s
+.code asm/ppc64le.s.txt
 
 * Common grammar
 
diff --git a/2016/asm/360.s b/2016/asm/360.s.txt
similarity index 100%
rename from 2016/asm/360.s
rename to 2016/asm/360.s.txt
diff --git a/2016/asm/386.s b/2016/asm/386.s.txt
similarity index 100%
rename from 2016/asm/386.s
rename to 2016/asm/386.s.txt
diff --git a/2016/asm/68000.s b/2016/asm/68000.s.txt
similarity index 100%
rename from 2016/asm/68000.s
rename to 2016/asm/68000.s.txt
diff --git a/2016/asm/amd64.s b/2016/asm/amd64.s.txt
similarity index 100%
rename from 2016/asm/amd64.s
rename to 2016/asm/amd64.s.txt
diff --git a/2016/asm/apollo.s b/2016/asm/apollo.s.txt
similarity index 100%
rename from 2016/asm/apollo.s
rename to 2016/asm/apollo.s.txt
diff --git a/2016/asm/arm.s b/2016/asm/arm.s.txt
similarity index 100%
rename from 2016/asm/arm.s
rename to 2016/asm/arm.s.txt
diff --git a/2016/asm/arm64.s b/2016/asm/arm64.s.txt
similarity index 100%
rename from 2016/asm/arm64.s
rename to 2016/asm/arm64.s.txt
diff --git a/2016/asm/cray1.s b/2016/asm/cray1.s.txt
similarity index 100%
rename from 2016/asm/cray1.s
rename to 2016/asm/cray1.s.txt
diff --git a/2016/asm/mips64.s b/2016/asm/mips64.s.txt
similarity index 100%
rename from 2016/asm/mips64.s
rename to 2016/asm/mips64.s.txt
diff --git a/2016/asm/pdp10.s b/2016/asm/pdp10.s.txt
similarity index 100%
rename from 2016/asm/pdp10.s
rename to 2016/asm/pdp10.s.txt
diff --git a/2016/asm/pdp11.s b/2016/asm/pdp11.s.txt
similarity index 100%
rename from 2016/asm/pdp11.s
rename to 2016/asm/pdp11.s.txt
diff --git a/2016/asm/ppc64le.s b/2016/asm/ppc64le.s.txt
similarity index 100%
rename from 2016/asm/ppc64le.s
rename to 2016/asm/ppc64le.s.txt
diff --git a/2016/asm/s390x.s b/2016/asm/s390x.s.txt
similarity index 100%
rename from 2016/asm/s390x.s
rename to 2016/asm/s390x.s.txt