The MKISOFS is the one that brings it all toghether. The freeDOS image is passed as an argument to be loaded in memory and then executed.
Anyway, this was a good feedback, I am planning a FreeDOS release withou my programs, and I will make that more clear and more specific, I gesse that the scrip that puts it all toghether may help. Alain Em 19-01-2012 01:47, Bob Cochran escreveu: > Hi Alain, Bernd, Eric: > > I followed the instructions below from Alain, using my Fedora 14 (Linux) > box. I didn't have 100% success but I am much closer! I created an image > file in the manner described below. I wondered where to find command.com > and kernel.sys...so I downloaded the FreeDOS iso for 1.1 and found those > files in the "one disk" folder. I copied them to my image and then > copied over my BIOS update files which are packaged in a directory. > However I ran into trouble at Step 8: specifically, I couldn't figure > out how to independently generate an "isolinux" folder or where to find > isolinux to start with. So I copied over the "ISOLINUX" folder I found > inside the FreeDOS 1.1 iso, and did some experimenting with the > arguments to mkisofs. This got me a nice small iso image which I burned > to CD. > > I then booted from this cd and got...the FreeDOS 1.1 installation screen > in all its glory! > > In Alain's recipe below, it is not obvious to me how the FreeDOS.img > file is connected to isolinux. I played with the tab key to see the boot > arguments for the CD I made, and I get the impression that FreeDOS.img > would be treated as the initrd= argument to isolinux. Am I right about > that? In other words, isolinux takes the FreeDOS.img file, loads it into > memory, and then passes control to it? > > Clearly, I need to read up more about using isolinux. I am very grateful > to all of you for your help and advice. I'm making progress! > > Bob > > > On 1/17/12 2:27 PM, Alain Mouette wrote: >> I have done this some time ago, it may help. It is for CD, but it would >> be nice to convert it to SD-card... >> >> Alain >> >> Em 15-06-2011 11:51, Alain Mouette escreveu: >>> How can I make a big (6Mb) bootable image to use in the CD? >>> This is the only part of the CD that I can read on *any* machine, I am >>> using isolinux) >> With lots of help fom Eric Auer, I managed to make a bootable image with >> FreeDOS. Here is how I did it: >> >> 1) Program needed: NASM, which I got from Debian >> $ sudo apt-get install nasm >> >> 2) program from Eric for the boot sector: >> <http://ericauer.cosmodata.virtuaserver.com.br/soft/specials/sys-freedos-linux.zip> >> create a directory ./sys-freedos-linux and expand it there >> >> 3) create file of the right size. 5760k was ok for me, there is some >> magic in the size and not everything will be ok. (more studies needed) >> $ dd if=/dev/zero of=FreeDOS.img count=11520 >> 11520+0 records in >> 11520+0 records out >> 5898240 bytes (5.9 MB) copied, 0.408512 s, 14.4 MB/s >> >> 4) Prepare it with a FAT file system >> $ sudo mkdosfs -v FreeDOS.img >> mkdosfs 3.0.1 (23 Nov 2008) >> FreeDOS.img has 64 heads and 32 sectors per track, >> logical sector size is 512, >> using 0xf8 media descriptor, with 11520 sectors; >> file system has 2 12-bit FATs and 4 sectors per cluster. >> FAT size is 9 sectors, and provides 2867 clusters. >> Root directory contains 512 slots. >> Volume ID is 0cbb7ca7, no volume label. >> >> 5) compile and write a suitable boot sector. This is a smart script by >> Eric Auer that configures it with the appropiate parameters >> $ ./sys-freedos-linux/sys-freedos.pl --disk=FreeDOS.img >> DOS boot sector for FreeDOS.img will be created by: >> nasm -o /dev/stdout -dISFAT12 >> ./sys-freedos-linux/bootsecs/boot.asm >> Using FAT12. Partn offset 0, CHS *x64x32 Drive 0, (0x0, 0x29), >> SerNo CBB-7CA7, Strings ' ', 'FAT12 '. >> Boot sector successfully updated. >> >> 6) mount it in a directory >> $ mkdir bootimg >> $ sudo mount -v -o loop,uid=you,gid=you FreeDOS.img bootimg >> >> 7) copy into it KERNEL.SYS, COMMAND.COM and all other files >> >> 8) use it just the same way then the image made from a floppy, memdisk >> will recognize it. I used isolinux, here is how I created the iso: >> $ mkisofs -R -v -A "FreeDOS big boot CD" -V FreeDOS-V1.x \ >> -b isolinux/isolinux.bin -c isolinux/boot.cat \ >> -no-emul-boot -boot-load-size 4 -boot-info-table \ >> -o /mnt/dados/Segurver/FreeDOS-V1.x.iso \ >> /mnt/dados/CDROM >> >> Alain >> >> ------------------------------------------------------------------------------ >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! 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