TRIGEM CW4D33E Operation Manual page 109

Move the screen cursor bar down to the Hard Disk C parameter.
Using the PgUp and PgDn keys, scroll through the options to
the disk type number matched with the hard disk you have.
If you have a SCSI hard disk drive with your system, you
should select "Not Installed" in this parameter. Because the
system BIOS do not control the SCSI type of HDD. And you can
select any type number except "Not Installed" when you use
ESDI hard disk drive. The hard disk drive type table supported
by this system BIOS has just MFM and RLL type of HDD.
If you select the type number 17 for 41MB RLL or MFM type of
hard disk, it provides the following information under the right
hand headings:
Using Hard Disk
Y
OUY
6-5