First post, by megatron-uk
I received this board from Ebay today - it's in nice shape, other than being dusty and having a flat Dallas RTC:
Initial testing shows that it works as expected:
I intend to remove the DX-33 and the 20ns of
256KB 64KB cache and replace with a DX-40 and/or DLC-40 and a full set of 15ns cache modules for 256KB. Luckily everything is already socketed on this board - the processor, cache and main oscillator.
But, the odd thing is that this board doesn't display any codes on the diagnostic card as it powers on. It just sits there like this:
Normally I would expect to see the POST codes flash up as the test progresses, but with this there's nothing; not even a blank 0000 code. Fortunately there doesn't appear to be anything wrong with the board, but it would be useful to know why it doesn't appear to generate codes via the usual mechanism.
My collection database and technical wiki: