Thank you for your help. I have downloaded and burned your flasher (last version). I am trying the swap trick without success.
My dreamcast does not like every brand of cdr. Is it the same thing with the Saturn? I used the same cdr than I use with my Dreamcast with ImgBurn. Burning speed was 16X. I cannot go slower.
Among Saturn parts, CDROM unit is the weakest one, and it's becoming vintage item, so there may be incompatibility with some CD-Rs.
Please try with different burning speed and/or different CD-R brand. Before purchasing different CD-R, please give a try at speed higher speed : maybe your CD burner is optimized for faster speed.
And there is no strong correlation between CD-R price and compatibility with Saturn (it's more or less a matter of luck ^^; ), so if burning your CD-R at faster speed didn't worked, then please try with CD-R at reasonable price, not necessarily the most expensive one.
When I try the swap trick it always end by many short burst sound coming from the cd-drive and after a while the cd player menu shows with a message about disk format.
Is there a way to know if the problem is with my swapping technic or if the problem is with a bad burned or incompatble cdr?
Please try to boot a regular game, same region as your Saturn's.
If it doesn't boots, then problem is likely on your Saturn side.
If swap trick doesn't works, even after watching swap tricks tutorials on youtube, and after many tries, and even after changing CD-R brand, please tune your CD-ROM laser beam with the potentiometer on your Saturn's CD drive board, rear side. It is orange, and can be tuned with a cruciform driver, you can't miss it.
Please note that you should tune that potentiometer as little as possible (= as close as possible from its initial state), since it is said that, in long term usage, incorrect tuning may damage your Saturn's laser.