driven.
Redid "mate determination" code to check that the chip base address was
the same but the port address was different.
Moved mc68681_process and mc68681_build_imr to the bottom of the file
so they would not be inlined.
Removed the code which forced mc68681_build_imr to always return 0 which
resulted in interrupts never being enabled from the chip.
Corrected spacing in prototype of mc68681_write_support_int.
Temporarily "if 0" of code which enables interrupts.
Moved setting of command registers at open but the current implementation
is questionable.
Added reset of RX errors while polling TX.
Read polled character as unsigned.
Baud rate mask must be in upper and lower nibble.
globally visiable to ease debugging.
Added support for mc68681 "2 column" style baud rate table as
well as the Exar 88681 "4 column" style baud rate table.
Added support for user override of the default baud rate table.
automatic handling of RTS/CTS. This only protects the on-chip buffers
and FIFOs -- not the termios queues as the RTS/CTS code in here did. It
may be necessary in the future to enable this automatic support.
Interrupt processing code added.
In some places, channel and duart base addresses were swapped.
