listamsb: complain more about lines >255 bytes long.

1 files changed, 12 insertions, 0 deletions

diff --git a/listamsb.rst b/listamsb.rst
index bf3863b..c5177e0 100644
--- a/listamsb.rst
+++ b/listamsb.rst
@@ -123,6 +123,18 @@ continues processing.
 
   Corrupt file, or not an AMSB file.
 
+- line *L* is suspiciously long
+
+  The line is >128 bytes long, but less than 256. AMSB can execute
+  lines of this length, but it's impossible to actually enter them
+  in the editor, because a logical line can't be longer than 3
+  screen lines. Possibly corrupted file.
+
+- line *L* is impossibly long
+
+  The line is >= 256 bytes long. AMSB will crash, if you try to
+  LOAD the file. Corrupted file.
+
 - line *L* EOL address doesn't match actual line length *N*
 
   Same as above: corrupt, or not AMSB.