I 've looked into the issue of the Duo SCSI microdock (Newer Tech.) 
According to one source (Sigma 7 systems) the dock uses a 53c90. I'm in 
th eprocess of trying to get th edetails out of Newer. If anyone's 
interested in helping me (I'm just gettign the info. I can't actually do 
the coding) email me at suprdave@purdue.edu

-dave

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suprdave@purdue.edu              http://expert.cc.purdue.edu/~suprdave
unix geek, Mac junkie         Be patient, it's the student mail server
"Please explain the scientific nature of the whammy."          -Scully