Commodore 1541 (Late)
This is the later version of the 1541 with the rotating lever instead of the ALPS mechanism seen on the early version. I modified my drive to allow daisy chaining by cutting jumper 1 on the board in the drive and wired it to a switch that I installed in the back. As a result, I was able to switch back and forth from the default DEVICE 8 to DEVICE 9 and allows me to use two disk drives at the same time. The later 1571 and other improved disk drives came from the factory with a switch in the back for choosing DEVICE 8, 9, 10, or 11 without requiring a hack like the 1541.
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Jon Stanley