Odd PDS Card

[hyperneogeo]

Seems to be made by Apple. Called the Carnation III ICE. Some sort of processor tester via the PDS slot?

 

[cheesestraws]

'ICE' may be 'In-Circuit Emulator' or similar?  A bit out of my area - I think ICEs usually have extra signals brought out, but that looks like it just has the processor pins available, so presumably designed for debugging the OS at a low level?