No computer needed.

From the manual:

MIDI OUT Jack: Standard 5-pin DIN MIDI cables connect to this jack. When the EXT.CLOCK function is off, the
2880 constantly generates MIDI Clock and outputs it through the MIDI OUT jack. Using the MIDI OUT Jack, the 2880
is the MIDI Clock master; you can slave another device, such as a drum machine, sequencer or beat box, to the 2880.
The 2880 also uses the MIDI OUT jack as a MIDI Thru, passing whatever commands the MIDI IN jack receives back
out to the MIDI OUT jack. When EXT. CLOCK Mode is activated, the MIDI OUT jack will pass the MIDI Clock signal it
receives through the MIDI IN jack back out of the MIDI OUT jack.

Of course you need to read the manual of the other device to see how to sync it.