Новодел Compact 256 turbo

[Shockwav3]

Possible fix for Shadow Monitor / Magic Button when using Scorpion ROM.
This basically adds back the !DOS and !NMI generation as done on yellow Scorpion boards.

UNTESTED!
https://i.imgur.com/iWj3AeT.png


Does not work and abandoning to get Scorpion ROMs fully working again.
I've managed to get to a state where returning from the NMI Menu is possible, "something" gets written when selecting Magic Button and occasionally the computer doesn't crash. Snapshots don't work tho. Slight improvement, but not by too much.
2.92 or later still can't boot from TRDOS 128 (I guess due to attempting to switch to turbo mode via a port) going via BASIC 128 -> USR0 -> Randomize USR 15616 still works.
Turns out Snapshots and leaving ShadowMonitor works fine when in 48K mode?! Oh well.