>> there is no INT 13nwith a large (32 bit) address.
>INT 13 can actually handle 64-bit addresses, both for LBA sector numbers and >memory addresses. Refer to INT 13.4x in RBIL. >From DOS, though, you probably wouldn't want to use 64-bit flat memory >addresses, but 64-bit LBA numbers are fine. "Format of disk address packet: 10h QWORD (EDD-3.0, optional) 64-bit flat address of transfer buffer; used if DWORD at 04h is FFFFh:FFFFh" according to http://www.o3one.org/hwdocs/bios_doc/bios_specs_edd30.pdf there is no 'optional' any idea how reliable/wide distributed this is? is this always available if LBA extensions are available? however, much more important: Get drive parameters Entry: AH - 48h DL - Drive number DS:SI - address of result buffer 2 Word Information Flags. A 1 bit indicates that the feature is available, a 0 bit indicates the feature is not available and will operate in a manner consistent with the conventional Int bit 0: DMA boundary errors are handled transparently will run a circle around the entire problem. should be fixed in the kernel ASAP (well ASAP after 23+ years is kind of joke ;) I still don't know why MSDOS is faster ... Tom _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
