Hi, while hacking on FDISK and having some thoughts about different sector sizes I stumbled upon the problem that the extended INT13 function 48 may return a sector size != 512 while the INT13,0X functions always seem to operate on „virtual“ 512 sector sizes.
Unsure how to handle this case I tried to find some hints in the FreeDOS Kernel source. In INITDSK.C the sector size returned by INT13,48 is simply ignored and only the total sector count is used to determine the size of the disk. This may be because in reality it is a non-existent problem (values other than 512 are not encountered „in the wild“). There is also a MAX_SEC_SIZE 512 definition leading me to the conclusion that sector sizes of > 512 are not supported at all? My initial idea for how to handle this in FDISK until a better solution is found was to sort of work-around it by reverting to CHS functions - with all the drawbacks this has - if the sector size returned by INT13,48 is not 512. Then at least the first ~8GB could be supported. But I would be glad if someone with more knowledge in that area could point me in the right direction, especially under the assumption of staying compatible. Greetings, Bernd _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
