MTools?
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| [SOLVED]: Building floppy.img https://forum.osdev.org/viewtopic.php?f=1&t=23044 |
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| Author: | LegendDairy [ Wed Jan 26, 2011 7:20 am ] |
| Post subject: | [SOLVED]: Building floppy.img |
Hi, I don't have a real floppy driver on my computer anymore, so I always make a floppy.img using "floppy.asc" and FASM. But now I need to store modules into the floppy image so I can use them with grub, but I have no clue how to edit the "floppy.asc" or any other file in there, Does anyone knows what I could do? Or is there maybe an easier way or something? I need to store "initrd.img" in there. Thx. SOLVED: I've you have the same problem look at my last post, I edited the "floppy.asc"-file and don't forget to edit the menu.lst file to add your module. |
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| Author: | AJ [ Wed Jan 26, 2011 7:24 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
Hi, What platform / tools are you using? If on Windows, you could use VFD to mount a floppy image, format it as FAT12 and then copy over your boot sector using partcopy. Your initRD can be copied as if the floppy image were a real floppy. If you're using cygwin, you could use a combination of MTools / dd to achieve the same sort of thing. Cheers, Adam |
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| Author: | LegendDairy [ Wed Jan 26, 2011 7:25 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
AJ wrote: Hi, What platform / tools are you using? If on Windows, you could use VFD to mount a floppy image, format it as FAT12 and then copy over your boot sector using partcopy. Your initRD can be copied as if the floppy image were a real floppy. If you're using cygwin, you could use a combination of MTools / dd to achieve the same sort of thing. Cheers, Adam I'm on Ubuntu |
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| Author: | AJ [ Wed Jan 26, 2011 7:27 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
Hi, In that case, the dd / MTools thing should still apply. In addition to these, you can also use losetup. Cheers, Adam |
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| Author: | NickJohnson [ Wed Jan 26, 2011 8:38 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
Since you don't have the floppy image thing set up yet, I would personally recommend trying to set up an El-Torito CD image instead. You install the bootloader to a floppy image once, then use that floppy image along with the files you want on the disc to produce the CD image each time. That way, you effectively never run out of space on the boot media, you can do real hardware tests using CDs, and when you want to fetch files using your OS, you write a useful ATAPI driver instead of a now-obsolete floppy driver. There are instructions on the wiki for doing this. |
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| Author: | egos [ Wed Jan 26, 2011 9:05 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
See readme.txt from last version of mkfloppy.zip. For previous version you can use following examples: GrubOnFloppy.zip GrubOnFloppy-198.zip |
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| Author: | LegendDairy [ Wed Jan 26, 2011 9:52 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
egos wrote: See readme.txt from last version of mkfloppy.zip. For previous version you can use following examples: GrubOnFloppy.zip GrubOnFloppy-198.zip Is there a simple way the edit the files in GrubOnFloppy to add "initrd.img" from the conten-folder to the floppy-img. |
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| Author: | Combuster [ Wed Jan 26, 2011 9:56 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
MTools?
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| Author: | LegendDairy [ Wed Jan 26, 2011 10:01 am ] |
| Post subject: | Re: [Help]: Building floppy.img |
Combuster wrote: MTools? NVM I got it to work with GrubOnFloppy and FASM  God I'm happy!I edited the "floppy.asc" file so it would add my module in there : Code: include "mkfloppy.inc" initrd=my module file
STAGE1_5 equ 0 file "content/boot/grub/stage1", 3 db "MKFLOPPY" dw 512 db 1 dw 1 db 2 dw 14*512/32 dw 2*80*18 db 0F0h dw 9 dw 18 dw 2 dd 0 dd 0 db 0 db 0 db 29h dd 55555555h db 11 dup 32 db "FAT12", 32, 32, 32 file "content/boot/grub/stage1": $, 512-$ if STAGE1_5 kernel_address=2000h kernel_sector=fatstage_base/512 kernel_segment=200h else kernel_address=8000h kernel_sector=stage2_base/512 kernel_segment=800h end if ; store byte 0 at 40h ; boot_drive cell store word kernel_address at 42h store dword kernel_sector at 44h store word kernel_segment at 48h ; fat1 db 0F0h, 0FFh, 0FFh, 9*512-3 dup 0 ; fat2 db 0F0h, 0FFh, 0FFh, 9*512-3 dup 0 ; root dent kernel, "KERNEL BIN", FA_ARC dent module, "INITRD IMG", FA_ARC dent boot, "BOOT", FA_DIR ; ... rb 33*512-$ defdir boot { dent grub, "GRUB", FA_DIR } defdir grub { if STAGE1_5 lent fatstage, "FAT_ST~1", FA_ARC, "fat_stage1_5" end if dent menu, "MENU LST", FA_ARC dent stage2, "STAGE2", FA_ARC } ; data stof kernel, "content/kernel.bin" stof module, "content/initrd.img" stod boot, root stod grub, boot if STAGE1_5 stof fatstage, "content/boot/grub/fat_stage1_5" store dword fatstage_base/512+1 at fatstage_base+1F8h store word (fatstage_size+511)/512-1 at fatstage_base+1FCh store word 220h at fatstage_base+1FEh end if stof menu, "content/boot/grub/menu.lst" stof stage2, "content/boot/grub/stage2" store dword stage2_base/512+1 at stage2_base+1F8h store word (stage2_size+511)/512-1 at stage2_base+1FCh store word 820h at stage2_base+1FEh ; ... rb 2*80*18*512-$ |
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