Were there separate PAL and NTSC versions of the A1200, or was there a motherboard jumper for this, or what?
I believe there are separate PAL and NTCS versions, but they should both be capable of displaying both screen modes. You can switch between PAL and NTCS in the 'early startup' screen, and you can also set screen mode in Workbench prefs.
What options are available today for scandoubling/flickerfixing so that I wouldn't have to keep a 1084 monitor on hand? How hard are they to come by?
There were at least 2 different ones when I got mine (but that was a few years ago). One had a couple sockets that went over the video chips and the other is a box that plugs into the video-out port. I don't remember what their names were. Try searching the CompuQuick and Software Hut sites.
Were there different motherboard revisions, and are there revisions to avoid like there were with the big box Amigas?
dunno.
Thank ewe...
Yer welcome...
"Git-R-Done, Smeghead" - RedNeck Dwarf ;-)