Wren IV (?cabling) Problem

[iccad]

We have about 10 (non Sun) SCSI shoeboxes, they all use the following
pinouts:

 -------------------------------------------------------------
 \    49    46   43    40  ...............  10  7   4   1    /
  \                                                         /
   \     48    45   42    39 ............ 12  9   6   3    /
    \                                                     /
     \50    47   44    41  ...............  11  8   5   2/
      ---------------------------------------------------

where pin 1 is the fist wire, pin 2 is the second wire, ..., of the flat
ribbon cable.

Alan Tsui
Mitel Corporation