Sorted it!

From: Gordon JC Pearce <>
Date: Thu Feb 17 14:00:16 2005

It was a memory problem. The DEC manual is wrong, and the "received
wisdom" that sprung up around it was wrong.

D3 is in fact a memory error, and D4 is the SLU.

Received on Thu Feb 17 2005 - 14:00:16 GMT

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