Mita DP-2800 Instruction Handbook Manual page 219

8.
Set the computer to the same parameters as the printer. On many computers this can be done
by setting DIP switches before power is turned on. Another method is as follows:
In DOS, enter the following commands:
C>MODE COM1:96,N,8,1,P
C>MODE LPT1:=COM1
To test the interface, then enter:
CTRL P
C>DIR
CTRL P
The software settings made by the procedures above are temporary. On most computers,
permanent settings must be made with DIP switches.
If you want to use a different baud rate or change any of the other RS-232C parameters, you can
use the printer's FRPO (firmware reprogram) command. See the Programming Manual for
details.
Appendix C Host Computer Interface
C-19