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> OS Construction > Option rom loading other option rom? |
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phpdevpad 19 Jan 2013, 16:04
When I jump into the option rom with call raidrom it gives me operating system not found.
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19 Jan 2013, 16:04 |
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baldr 19 Jan 2013, 20:30
phpdevpad,
It can be caused by many circumstances, especially when ROM image you're trying to start (loaded with file) assumes that it's placed at offset 0 in segment. You have to move it in a proper place beforehand. Are you trying to load part of foreign BIOS as option ROM? |
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19 Jan 2013, 20:30 |
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phpdevpad 19 Jan 2013, 22:51
@baldr: I'm trying to find a way to call an option rom. When I integrate newest option rom I get always operting system not found. When I integrate on older option rom bios doesn't boot unless I press esc-key (http://board.flatassembler.net/topic.php?t=14965).
Now I'm trying the same ^^ and make a far call to bcv in the option rom but the bios doesn't see and start the option rom??? Code: ;--------------------------------------------------------------------------------- ;---------------------------PCI ROM Header---------------------------------------- ;--------------------------------------------------------------------------------- BOOT equ 18h OLDBOOT equ 86h ROM_SIZE_IN_BLOCK = 125 ; 1 means ROM size is 1 block (512 bytes) ROM_SIZE_IN_BYTE = ROM_SIZE_IN_BLOCK * 512 VENDOR_ID equ 1002h ; PCI Vendor ID (must match your ethernet vendor id) ; exp: 10DE = nVidia DEVICE_ID equ 4392h ; PCI Device ID (must match your ethernet devicie id) ; exp: 0057h = nforce4 CK804 NIC ROMStart: db 0x055, 0x0AA ; ROM Header 55,AA -> Bootable rom db (ROMEnd - ROMStart)/512 ; ROM Size in 512byte jmp MAIN db 0 ; checksum, to be filled in later TIMES 18h-($-$$) DB 0 ; padding zeros to offset 18h DW PCIHDR ; pointer to PCI Header DW PNPHDR ; pointer to PnP Expansion Header PCIHDR: DB 'PCIR' ; PCI data structure signature DW VENDOR_ID ; vendor ID (must match real PCI device) DW DEVICE_ID ; device ID (must match real PCI device) DW 0 ; pointer to vital product data (0=none) DW 24 ; PCI data structure length [B] DB 0 ; PCI data structure revision (0=PCI 2.1) DB 8Fh,04,01 ; PCI device class code (2=network ctrlr,0=eth.) DW ROM_SIZE_IN_BLOCK ; ROM size in 512B blocks DW 0 ; revision level of code DB 0 ; code type (0=x86 compitable) DB 80h ; last image indicator DW 0 ; reserved PNPHDR: DB '$PnP' ; PnP data structure signature DB 1 ; PnP structure revision DB 2 ; PnP structure length (in 16B blocks) DW 0 ; offset to next header (0-none) DB 0 ; reserved DB 8Bh ; PnP structure checksum DD 0 ; device identifier DW 0 ; pointer to manufacturer string DW 0 ; pointer to productname string DB 8Fh,04,01 ; device class code (2=network ctrlr,0=eth.) DB 64h ; device indicators (64h - shadowable,cacheable,not ; only for boot,IPL device) DW 0 ; boot connection vector (0-none) DW 0 ; disconnect vector (0-none) DW 0 ; bootstrap entry vector (0-none) DW 0 ; reserved DW 0 ; static resource info vector (0-none) MAIN: pushfd pushad push ds debug_step1: ;print int13 vector mov ebx,00000000h mov eax, [fs:ebx+4ch] mov ecx, eax mov dx, 25/2 mov ax, 80/2 - 8/2 call print_hex mov ah, 00h int 16h ; key press wait cmp al, 0dh ; Enter key je debug_step2 ; Handle jne debug_step1 debug_step2: ;print disk number BDA mov ebx,00000000h mov eax, [fs:ebx+474h] mov ecx, eax mov dx, 25/2 mov ax, 80/2 - 8/2 call print_hex mov ah, 00h int 16h ; key press wait cmp al, 0dh ; Enter key je ccc ; Handle jne debug_step2 ccc: ;set ES:DI to PnP install check mov ax,0f000h mov es,ax mov di,0e2d0h mov bx,-1 mov dx,-1 mov ax,4 ;call far 0D000h:1391h call raidrom+0x02d7 debug_step3: ;print int13 vector mov ebx,00000000h mov eax, [fs:ebx+4ch] mov ecx, eax mov dx, 25/2 mov ax, 80/2 - 8/2 call print_hex mov ah, 00h int 16h ; key press wait cmp al, 0dh ; Enter key je debug_step4 ; Handle jne debug_step3 debug_step4: ;print disk number BDA mov ebx,00000000h mov eax, [fs:ebx+474h] mov ecx, eax mov dx, 25/2 mov ax, 80/2 - 8/2 call print_hex mov ah, 00h int 16h ; key press wait cmp al, 0dh ; Enter key je zzz ; Handle jne debug_step4 zzz: ;choose exit type retf or int18 mov ah, 00h int 16h ; key press wait cmp al, 0dh ; Enter key je ggg ; Handle jne ddd ggg: pop ds popad popfd ret ddd: pop ds popad popfd int 0x18 print_hex: ; DX = Row ; AX = Col ; ECX = NUMBER (Assuming 80x25 mode) pushad push es push $B800 pop es imul di, dx, 80 add di, ax shl di, 1 mov edx, ecx mov ecx, 8 mov ah, 7 ; GRAY FONT; BLACK BACKGROUND .writeNibble: rol edx, 4 mov si, dx and si, $F mov al, [cs:.lut+si] stosw loop .writeNibble pop es popad ret .lut db '0123456789ABCDEF' ;__________________________________________________________________________________________________________________ raidrom: file "raid700.rom" times (ROM_SIZE_IN_BYTE-$) db 0 ; use 00h as the padding bytes until we ;reach the ROM size ; The last byte (512th) will be the patch_byte for the checksum ; patch_byte is calculated and automagically inserted below PREV_CHKSUM = 0 repeat $ load CHKSUM byte from %-1 CHKSUM = (PREV_CHKSUM + CHKSUM) mod 0x100 PREV_CHKSUM = CHKSUM end repeat store byte (0x100 - CHKSUM) at ($-1) ; store the patch_byte ROMEnd: |
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19 Jan 2013, 22:51 |
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baldr 23 Jan 2013, 10:54
phpdevpad,
You may try to put file "raid700.rom" at the very beginning (thus ensuring it starts at offset 0), append your code after it, then patch result using load/store (to redirect execution forth and back, like in infected executable). Your method has a good chance to fail unless ROM is written as position-independent (and it's rarely so). |
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23 Jan 2013, 10:54 |
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phpdevpad 24 Jan 2013, 13:50
@baldr: Thank you but I didn't understand. However I had an idea and it's almost working. I have disassambled the misc.bin and permanently activated the esc-key sequence. This seems to work and bios boot and it's shows the splash and then the post screen. Now I want to try to activate the ctrl-f key to open the raid menu because my patch seems to delete the raid menu, too?! Maybe you can help? Currently I'm reading this: http://ebook.pldworld.com/_eBook/dosref33/.
Success!! Now, I'm wondering if I can update to latest option rom?? With latest option rom I get Load to misc.bin error and bios freezes? Last edited by phpdevpad on 29 Jan 2013, 12:54; edited 1 time in total |
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24 Jan 2013, 13:50 |
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Flat12 25 Jan 2013, 21:16
Try cut code - first 512 bytes ( EA 05 00 .... 55 AA) from gPXE 1.0.1 floppy image. This is boot-sector loader other ROM image:
Code: Loading ROM image...
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25 Jan 2013, 21:16 |
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phpdevpad 28 Jan 2013, 00:08
Thank you for your help but my option roms works.
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28 Jan 2013, 00:08 |
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