Yes, basically the dongle only routes the read line of the internal drive to the external drive's write line.
The GAL chip is there to automatically swith the dongle off/on, afaik. (normally, it is switched off, so you can just use the external drive like normal without the need to remove the dongle)
Later Cyclone version will automatically switch on the dongle for copying (and then switch it off again for verifying)
However, my interest is if there is more than one revision of the GAL chip which runs on the 02/02/92 pcb version ?!
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