@table @code
@item l1_data
-@item l1_data_A
-@item l1_data_B
+@itemx l1_data_A
+@itemx l1_data_B
@cindex @code{l1_data} variable attribute
@cindex @code{l1_data_A} variable attribute
@cindex @code{l1_data_B} variable attribute
stored.
@item io
-@item io (@var{addr})
+@itemx io (@var{addr})
Variables with the @code{io} attribute are used to address
memory-mapped peripherals. If an address is specified, the variable
is assigned that address, else it is not assigned an address (it is
@end example
@item cb
-@item cb (@var{addr})
+@itemx cb (@var{addr})
Variables with the @code{cb} attribute are used to access the control
bus, using special instructions. @code{addr} indicates the control bus
address. Example: