The Sinclair QL Forum

Assuming you made the startup keypresses like a Minerva

LOL ! The MGX ROM patch was done loooooong before Minerva existed... It was back in 1986, shortly after I bought my first Sinclair QL... So that would be the other way around: Minerva would have done like me !

Note that I don't remember exactly how the second screen was enabled (on boot ? SHIFTed F1/F2 ?... Not sure any more), but all display related QDOS TRAPs #3 were modified to take into account the actual screen address... So there will be some trial and error to do with those ROMs, but they are other...

Greetings, I just read your post and may perhaps help: while I don't seem to have kept a dump of the MGF ROM of my first QL, 30 years ago, I patched the said ROM to be able to use the second screen memory bank of the QL (by simply changing the related and existing QDOS system variable), which allowe...