Instructions:
Make Bootable Floppy Disk
Extract / copy all files in the ZIP file onto Boot Disk
You MUST have an ASPI manager loaded in your CONFIG.SYS for SCSI drives
( i.e. ASPI8DOS.SYS for Adaptec's AHA2940 SCSI card )
Reboot PC with Boot Disk inserted.
type update.bat (press return)
F/W will now be updated,
(you may be prompted to insert a disk, any CD will do)
Wait for Flashing to finish.
Reboot PC

[Disclaimer]
  Toshiba will not accept responsibility for any damages incurred due to use
  of this software.
  
This software is provided "as is" and should be used by technically
  experienced persons only.