Well, going back to the 1070, the assignment is as follows:
1————signal ground
2————signal ground
3————red
4————green
5————blue
6————not connected
7————composite SYNC
8————not connected
9————not connected
Depending on the switch setting for RGBA or RGBI, it may (the 1080 that
is) not use separated sync in the Analog position…probably your best bet, is
to go to an Amiga dealer, I'm sure they wouldn't mind giving you the exact
pinouts for the 1080.