Yamaha WF192 Online Manual page 25

4. DOS-BOX
This provides a mechanism to fully support the DOS applications for the Windows DOS-BOX.
MPU401 Out
This field has a mechanism to transfer MIDI data, which is delivered to the MPU401 as output from the DOS
applications, to either MIDI port interface or internal XG synthesizer.
n
You should adjust the IRQ or DMA configuration of a DOS game to match the configuration in this field.
Serial
Checking this box outputs MIDI data externally through the MPU401 compatible MIDI port.
XG
Checking this box transfers MIDI data to internal XG synthesizer for producing the acoustic sound outputs.
Volume control is performed via MIDI with Windows' standard volume control capability.
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