search for: 81h

...ine when chainloaded natively as .bs (and dos also as .bss). PS. By the way - there's another "trick" to make dos (at least microsoft versions) to boot from another harddisk - if you set actual physical drive number in its bootsector and as active flag on the respective disk (e.g. 81h instead of 80h). This way there's no need for drive swapping code.

So when you boot from only your hard drive attached, it is the primary and only drive. It loads the master boot record that load the NT Loader boot code that is then configured to load the operating system from the primary partition on the primary drive. When you boot from the USB drive, you make it the Primary drive. You then tell it to load the MBR fromt the secondary drive. The secondary

...mov di,KernelName + mov cx,11 + repe cmpsb + je is_swap + ret + +is_swap: + call crlf + mov si,swap_loading + call cwritestr + + push bx + mov ax,0201h ; read disk, 1 sector + mov bx,trackbuf + mov cx,1 ; track 0, sector 1 + xor dh,dh ; head 0 + mov dl,81h ; second hard drive + int 13h + pop bx + jnc swap_read_ok + call crlf + mov si,swap_failed + jmp abort_load +swap_read_ok: + + mov bx,[bsBytesPerSec] + mov ax,[bx+trackbuf-2] + cmp ax,0AA55h ; Boot sector signature + je swap_bootsec_ok + jmp bad_bootsec +swap_bootsec_ok:...

...following messsages were output by the Adaptec BIOS Press ^A for SCSISelect(TM) Utility!>>> SCSI ID #1 - Yamaha CRW8424S A BOOTABLE CD-ROM IS DETECTED IN YOUR CDROM DRIVE. The boot sections on your bootable CD-ROM are: 0. DEFAULT ENTRY YOUR CD-ROM DRIVE IS INSERTED AS - DRIVE D:(81h) BIOS Installed Successfully. Once the BIOS had finished I received the following messages ISOLINUX 3.51 2007-06-10 isolinux: Loading spec packet failed, trying to wing it. ... isolinux: Found something at drive = 81 isolinux: Failed to locate CD-ROM device; boot failed. See http://syslinux.zytor....

Whilst looking at the 3.61 isolinux.asm file I noticed that the code uses a spec buffer size of 13h for the initial BIOS call with the drive number passed in in DL. It then uses a spec buffer size of 13 when scanning drive numbers from FFh to 81h Line 291 is mov byte [spec_packet],13h Lines 576 to 577 are mov si,spec_packet mov byte [si],13 ; Size of buffer Is the use of 13 an error or is there some reason I don't understand ?

hi, we've got a server with a 8 port 3ware card and 2 ide system disks. now we'd like to replace the ide disks with scsi disks or sata disks (these also recognized as scsi in the kernel). but we can't boot from it. the problem are twofold. first in the normal case the first scsi host scsi0 id the 3ware card, but grub only see the first 8 disk so if the system disk are sdi and sdj the

It seems that quite a bit of stuff built up very quickly after the 2.07 release: Changes from 2.07 to 2.08-pre6: * Add new configuration command "ontimeout" to allow timeout to have a different action than just pressing Enter. * Add new configuration command "onerror" to allow a custom command to be executed in case the kernel image is

...tionValue: 1 iConfiguration: 0 bmAttributes: e0h MaxPower: 1 bInterfaceNumber: 0 bAlternateSetting: 0 bNumEndpoints: 2 bInterfaceClass: 3 bInterfaceSubClass: 0 bInterfaceProtocol: 0 iInterface: 0 bEndpointAddress: 81h bmAttributes: 03h wMaxPacketSize: 64 bInterval: 20 bRefresh: 0 bSynchAddress: 0 bEndpointAddress: 01h bmAttributes: 03h wMaxPacketSize: 64 bInterval: 10 bRefresh: 0 bSynchAddress: 0 ===...

Good day to all, Gert Hulselmans requested a feature for MDISKCHK.COM that would function roughly like GETARGS.COM[1] by Murali Krishnan Ganapathy: DOS SET command output for MEMDISK kernel arguments passed by previous boot-loaders. He also needed to support the case for MEMDISK-in-a-MEMDISK type situations, where all MEMDISK kernel arguments could be gathered together and output as a list

...h + jnc got_e801 + + mov ax,2 + mov bx, msg_memory + int 22h + stc + ret + +got_e801: + cmp ax,3c00h + jb mem_below_16mb + shl ebx,6 + add eax,ebx + +mem_below_16mb: + shl eax,10 + mov [gfx_bios_mem_size],eax + shr eax,20 + cmp ax,16 + jb skip_extended + + mov word [gfx_xmem_0],81h ; 1MB at 8MB + mov word [gfx_xmem_1],0a1h ; 1MB at 10MB + mov dword [gfx_save_area1],7f0000h ; 8MB-64k + +skip_extended: + movzx ebx,word [gfx_mem_start_seg] + shl ebx,4 + + movzx ecx,word [gfx_mem_end_seg] + shl ecx,4 + + mov dword [gfx_mem],ebx + mov dword [gfx_mem0_start]...