The s390 version of @code{@value{AS}} supports two architectures modes
and seven chip levels. The architecture modes are the Enterprise System
Architecture (ESA) and the newer z/Architecture mode. The chip levels
-are g5, g6, z900, z990, z9-109, z9-ec, z10, z196, and zEC12.
+are g5, g6, z900, z990, z9-109, z9-ec, z10, z196, zEC12, and z13.
@menu
* s390 Options:: Command-line Options.
@code{z990},
@code{z9-109},
@code{z9-ec},
-@code{z10} and
-@code{z196}.
+@code{z10},
+@code{z196},
+@code{zEC12}, and
+@code{z13}.
Assembling an instruction that is not supported on the target processor
results in an error message. Do not specify @code{g5} or @code{g6}
with @samp{-mzarch}.