Hi,
Hey, I recognize "philboyd" from the former Tascam hosted 788 forum. I sure miss that... but this forum site is great.
Anyway, from what I know, phil is 1/2 correct - it won't work. However, the 788 SCSI port is not "just" outgoing. When you restore backups from the CD-R/W the port is "ingoing" as data goes into the 788 from the CD-R/W.
Also, Tascam wired the SCSI port in their own proprietary way. Essentially, they used a SCSI connector/cable cuz it's readily available but they wired it to suit their specific needs.
Scott