msd: yep, IIRC, it was something like:
- VDP command
- FDC command
- VDP command (without checking if the previosu command completed)
On a disk drive, the FDC command takes long enough to complete, but on a faster drive, not and then the 2nd VDP command messes things up.
SMD: cool! But now you also know that you could test this in openMSX 
(And we should tell dvik about the bug in blueMSX, if it's not the same as the already mentioned one.)
W76 is correct 
If my diskrom detects a TurboR in R800 mode it adds a tiny delay in reading. With this delay the Gazzel demo is fine now. Manuel was correct that XAK3 depends on slow drives (The delay is not noticable in the loading speed)
Gazzel and Big Strategy both need a minor patch to run from HDD when you use a TurboR. On MSX2 and MSX2+ they will run either with or without the patch.
I will post the newest version and offets to patch this afternoon (patches will be added to fixit.com).
The only disks I cannot support is disks with .BAS files on it. I cannot run a basic environment in DOS2.
It would be nice if all of us could post games that work in this topic. This will save me a lot of time debugging and testing
If you have information on patches for games please let me know the offsets and data to change so i can add it to fixit.com
Ok here you go, I uploaded the latest version. It will be open beta from now on
www.xs4all.nl/~martenw/runit2ob.zip
File will be runit.com again as you can replace the old version. Please make sure the emudsk.rom file is in the same directory as runit.com
Here are known patches needed to run the games in the table below. Just open the diskimage in a hex editor (like UltraEdit) and put the new byte at the given offset.
; FIXIT 1.0 Patch table
;
; Game name
; DISK | OFFSET | NEW BYTE
; $FFFF (end of patch)
;
ALESTE2 db "Aleste 2",0
dw $01,$1F0D,$00
dw $01,$1F0E,$00
dw $01,$1F0F,$00
dw $FFFF;
; Disable MicroCabin's disk buffering (only needed for TurboR)
PRINCESSMAKER db "Princess Maker",0
dw $01,$1F30,$04
dw $FFFF
XAK3 db "Tower of Gazzel",0
dw $01,$21D4,$04
dw $02,$21D4,$04
dw $03,$21D4,$04
dw $04,$21D4,$04
dw $FFFF
BIGSTRATEGY db "Big Strategy",0
dw $01,$2150,$04
dw $FFFF
It's pretty nice to know the history behind Runit which also was the reason I started with this.
W76 came at my devshek and told me he couldn't run SD Snatcher from HDD with start.com. So ofcourse I started programming to get SD Snatcher working. Then he inspired me to go beyond SD Snatcher and try for the ultimate goal! to get MicroCabin games running from HDD as well.
With W76's support and my programming skillz and help from very good dev friends I wish you to have fun playing MicroCabin games ^^
More games will follow but i'll be busy debugging a lot to get everything working .