Allow scrambling SRAM banks up to the full 8-bit range

man/rgblink.1

@@ -53,7 +53,7 @@ but also prohibits the use of banked VRAM.
 .Nm
 accepts the usual short and long options, such as
 .Fl V
-and 
+and
 .Fl -version .
 Options later in the command line override those set earlier, except for when duplicate options are considered an error.
 Options can be abbreviated as long as the abbreviation is unambiguous:
@@ -285,7 +285,7 @@ Certain regions allow omitting the size, in which case it defaults to its maximu
 .Bl -column "Region name" "Max value" "Size optional"
 Region name Ta Max size Ta Size optional
 .Cm romx Ta 65535 Ta \&No
-.Cm sram Ta 255 Ta \&No
+.Cm sram Ta 256 Ta \&No
 .Cm wramx Ta 7 Ta Yes
 .El
 .Pp