replaced (TNF: ahoka) insists on me mentioning that we specify integer

silent wrapping (gcc -fwrapv) as expected behaviour

mksh.1

@@ -1,4 +1,4 @@
-.\" $MirOS: src/bin/mksh/mksh.1,v 1.143 2008/10/20 19:52:07 tg Exp $
+.\" $MirOS: src/bin/mksh/mksh.1,v 1.144 2008/10/24 21:27:20 tg Exp $
 .\" $OpenBSD: ksh.1,v 1.122 2008/05/17 23:31:52 sobrado Exp $
 .\"-
 .\" Try to make GNU groff and AT&T nroff more compatible
@@ -30,7 +30,7 @@
 .el .xD \\$1 \\$2 \\$3 \\$4 \\$5 \\$6 \\$7 \\$8
 ..
 .\"-
-.Dd $Mdocdate: October 20 2008 $
+.Dd $Mdocdate: October 24 2008 $
 .Dt MKSH 1
 .Os MirBSD
 .Sh NAME
@@ -1055,9 +1055,10 @@ form
 where
 .Ar expr
 is an arithmetic expression.
-Array indices are currently limited to the range 0 through 4294967295 (for
+Array indices are currently limited to the range 0 through 4294967295, (for
 .Nm
 only; portable maximum is 1023), inclusive.
+That is, they are a 32-bit unsigned integer.
 Parameter substitutions take the form
 .Pf $ Ns Ar name ,
 .Pf ${ Ns Ar name Ns } ,
@@ -2129,6 +2130,8 @@ Grouping operators:
 ( )
 .Ed
 .Pp
+Integer constants are currently limited to 32-bit, signed or unsigned.
+Overflows wrap silently.
 Integer constants may be specified with arbitrary bases using the notation
 .Ar base Ns # Ns Ar number ,
 where