Hello, I downloaded all from Zimmers and I found a WD catalog with all datasheets in the web. But nowhere is an information about version A and B of the 1797! It's not the speed grade! All 1797 are 2MHz chips. The 1MHz controllers have different WD-numbers. I can get 1797-PL and 1797A-02 at ebay - but no 1797B! is it interchangeable? The 1797B looks different - it has a black painted windows at the top - like an UV-eprom - I think its factory programmed? Also I cannot find a service manual of the 8280. My drive has an error code (5 times blinking). In the 8250 its a zero page fault (6532) - but changing both 6532 has no change... Christian ----- greets Christian -- Sent from: http://cbm-hackers.2304266.n4.nabble.com/Received on 2018-04-24 08:00:02
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