Hi Paul,
> I now realize it is still an IDE driver, not an AHCI driver like I thought. > Anyway, I wonder if the kernel itself would be needed to support AHCI mode The DOS kernel has nothing to do at all with your drive controllers. DOS either asks the BIOS to read or write sectors (for harddisk and floppy) or it asks a driver to do that. Drivers can either be the type which can read or write sectors, or they can be the type which provides accesss to an opaque filesystem. In the CD / DVD / BluRay case, you have one filesystem driver (SHSUCDX, MSCDEX etc.) which talks to another sector driver, because the sectors on a CD / DVD etc. are not part of a FAT filesystem. So if you want to access CD / DVD etc. which use some controller type which is not supported by UDVD2, BIOS or similar, then you would want a driver which provides sector access for SHSUCDX etc. Note that BIOS access to CD / DVD normally is only done when you boot from it: This can be done with the ELTORITO sector driver. In all other cases, you use UDVD2 or similar sector drivers which support IDE, SATA and similar controllers :-) Regards, Eric PS: There are diskimage type CD / DVD sector drivers, as SHSUCDHD. _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
