On 16.03.2011 23:00, Lennart Sorensen wrote: > On Wed, Mar 16, 2011 at 09:19:12PM +0100, Vladimir 'φ-coder/phcoder' > Serbinenko wrote: > >> Following may help: >> === modified file 'grub-core/disk/i386/pc/biosdisk.c' >> --- grub-core/disk/i386/pc/biosdisk.c 2011-01-04 14:42:47 +0000 >> +++ grub-core/disk/i386/pc/biosdisk.c 2011-03-16 20:17:57 +0000 >> @@ -80,6 +80,9 @@ >> regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT; >> >> grub_bios_interrupt (0x13, ®s); >> + if (!(regs.flags & GRUB_CPU_INT_FLAGS_CARRY)) >> + return 0; >> + >> return (regs.eax >> 8) & 0xff; >> } >> > I now got this: > > GRUB loading. > Welcome to GRUB! > > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > int13_ext fixup due to CARRY flag > It's not really a fixup. Correct return on no error is CF=0 AH=0. Some BIOSes in some other functions returned CF=0, AH!= 0 on no error so it was a wild guess. > Failed int13_ext call: ah=42, drive=80, dap= 6fe00 returned eax=8000 > Error 0x80 according to http://www.delorie.com/djgpp/doc/rbinter/it/34/2.html means timeout. Following code would retry on timeout: === modified file 'grub-core/disk/i386/pc/biosdisk.c' --- grub-core/disk/i386/pc/biosdisk.c 2011-01-04 14:42:47 +0000 +++ grub-core/disk/i386/pc/biosdisk.c 2011-03-16 22:13:12 +0000 @@ -72,6 +72,8 @@ grub_biosdisk_rw_int13_extensions (int ah, int drive, void *dap) { struct grub_bios_int_registers regs; + int tries = 4; + retry: regs.eax = ah << 8; /* compute the address of disk_address_packet */ regs.ds = (((grub_addr_t) dap) & 0xffff0000) >> 4; @@ -80,6 +82,16 @@ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT; grub_bios_interrupt (0x13, ®s); + if (!(regs.flags & GRUB_CPU_INT_FLAGS_CARRY)) + return 0; + + if (((regs.eax >> 8) & 0xff) == 0x80 && tries) + { + grub_millisleep (10); + tries--; + goto retry; + } + return (regs.eax >> 8) & 0xff; }
> error: hd0 out of disk. > Entering rescue mode... > grub rescue> > > I am now using 1.99-rc1. Here is the biosdisk.c with my changes. > > > > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > http://lists.gnu.org/mailman/listinfo/grub-devel > -- Regards Vladimir 'φ-coder/phcoder' Serbinenko _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
