diff --git a/scans/README.md b/scans/README.md
index 2b2156a..359beea 100644
--- a/scans/README.md
+++ b/scans/README.md
@@ -29,7 +29,8 @@ Details of the files:
 * maksys.s: page 64  of 01-s1.pdf
 * trysys.s: page 65  of 01-s1.pdf
 * scope.v: pages 3-18 of 03-scope.pdf
-* cas.s: pages 1-17 of 04-cas.pdf
+* cas.s: pages 1-8 of 04-cas.pdf
+* cas.x: pages 9-17 of 04-cas.pdf
 * adm.s: pages 2-11  of 05-1-4.pdf
 * ald.s: pages 13-17 of 05-1-4.pdf
 * apr.s: pages 19-30 of 05-1-4.pdf
diff --git a/scans/cas.s b/scans/cas.s
index e8a8261..7e979d2 100644
--- a/scans/cas.s
+++ b/scans/cas.s
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