I have an fully working 8280. In total have 5 TM848-2 drives (two in the 8280). One has a headcrash. One was OK and I repaired the other three (TTLs failed: f.ex. 7474). My drives have three different PCB revision - with different jumpers. At all drives are M1 and M3 closed. In the web are different installation manuals/service manuals for the revisions. On my site is a picture of the controller-board with the most common revision: http://mos6509.com/8280.html <http://mos6509.com/8280.html> ----- greets Christian -- Sent from: http://cbm-hackers.2304266.n4.nabble.com/Received on 2019-01-09 11:00:29
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