Illusion City - What I never
Wow, you're right! Maybe nothing! One should go and try to make an MSX2 version 
Well, that may well be possible. 
Could it be that Microcabin's motives for making the game "Turbo R only" were merely based on required RAM space?
Seems like a rather crude solution.
* Why Turbo-R? (by Adriano C. R. da Cunha)
Analyzing parts of Illusion City's code this question can be answered quite simply: "because it isn't very well programmed" (notice the quotes).
Probably, Microcabin coded Illusion City not in assembly Z80, assembly R800, C, Pascal, BASIC or any other "standard" programming language, but in its own script language. Later, this script was automatically compiled to - at least - MSX and PC-98 (as per the manual). The machine-dependant routines were coded then for each hardware. It's easy to notice that this solution created inefficient code that only a more powerful hardware could compensate (in the same way Micro$oft does with Windows). Another strong argument for this theory is that the game doesn't use, as far as it can be noticed, specific R800 opcodes.
* Which plus functionalities the MSX Turbo-R version has? (by Adriano C. R. da Cunha)
None, confirming the theory that the game "is not very well programmed", thus slow and in need of a faster CPU that only Turbo-R machines had. Illusion City doesn't use, as far as it can be noticed, any VDP V9958 (used in MSX2+/TR machines) command, but only VDP V9938 (used in MSX2 machines) commands.
OMG, I can't believe it! 
Well, once more, a mystery flies out of the window.
Does anybody knows who is going to translate the final two disks?
The project seems to have died before it was finished. There was a time that I hoped that maybe Bazix was doing something about it behind the screens, but since it has been very very very silent since....
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