Last night I woke up about 4 AM and realized that I don't have to use any Arduino(s) for the Cable Tester. 
I remembered that I had picked up a VME chassis with a bunch of Rotec I/O cards. The final configuration will be 256 channels (half input and half output) So here what I'm going to do.
Parts:
- 32 channel Output Card(s) DIG 32-Ok (I have 4 of them)
- 32 channel Input Card(s) DIG 32-IS (need 4 and I have 6 of them)
- Interface Cables RTC-K-049/4M (need 8 and I have 10 of them.)
- VME CPU w/ Ethernet
- Hard Drive Interface
- VME Chassis & Power Supply
- Linux Box for GUI etc.
Problems: 
- Rotec Gmbh is in Germany which is an early call for me so I have to call before 7 AM (about 2 PM in the afternoon), hopefully, they will have the documents I will be looking for. The other problem is my German well sucks.
- I will have to pull apart my lab to get at the large VME rack at the bottom of the stack. Hopefully, it still powers up.
- Then I have to find a CPU that's not too old so I can run Linux on it.
- VME/SCSI Adapter a nice Motorola MVME-327A hda brand new in the box.
- I need to find an MVME-717 SCSI Transition Module. As it so happens I can just run a 50 pin cable from P2 on MVME-327A to the hard drive directly. As per paragraph 5.2 in dah manual. (aren't they great)
- After all that I just need a hard drive. And then I write some software.
* Please Note that some of the Problems are in Red or Not done and when Green they are done.
~~ Cris H. 
Stay Tuned, More to Come!
NOTES & ADDENDUM:
- Just found a VMIC 7648 which is a 32 bit Intel P3 with 512Mb of memory, Ethernet, USB, VGA, but no hda on the SBC. (more problems)
- Before I try and recover the large chassis I can test the CPU and HDA combo in a small 6 slot desktop chassis.
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