Wow, it was over 5 years ago already that I started trying to figure out how to use a TDL-12. Doesn't seem that long ago. There is a thread about it here, and that is where someone eventually responded with a copy of the manual. http://www.vcfed.org/forum/showthread.php?34859-TD-Systems-TDL-12-QBus-SCSI-controller-information