Micropolis 1303

[silvercreekvalley]

Hi Tony,

I did try some other drives, namely some MFM drives
I had to hand from a PDP 11. These were ST-412
drives. 

I simply connected the existing PERQ controller to the
new drive, hoping the hard disk would show ready, but
no joy.

The drive didnt even show a flicker on the LED.

The drives were all known working, and boot fine on a 
11/23. I didnt change any jumpers as the drives were 
the only drive in the PDP 11's.

Could this mean a fault EIO card? 

I've examined the board carefully under a maginfier
for
track breaks, dry joints, and damage. The edge
connectors 
were cleaned and all IC's have been carefully
re-seated.

Ian.



       
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