Dos Boot på CD rom!

>>>To be able to create a bootable CD, you will need the following:

1. A SCSI or IDE/ATAPI CD Recorder, with necessary hardware to run, e.g SCSI adapter

2. One blank CD-R.

3. CD-R Mastering software such as Adaptec Easy CD Pro, Easy CD Creator, Toast, Jam etc.

4. One spare 1.44MB floppy disk.

Note - You do not necessarily need the CD-R software to "create" the files needed for a bootable CD-ROM, as these can be created manually. See the links section for more details. However, you will need some kind of software to physically burn your CD.

>>>Preparing for a bootable CD

A bootable CD requires a bootable "image". This image is where all the necessary system files are placed, such as device drivers etc. This is the first section your system looks at. This image is taken directly from a bootable floppy. If you don't know how to create a bootable floppy, read your DOS or Windows manual and come back later.

If you already know how to do this, I still recommend you read on. Once you have burned your CD, you can't edit your startup sequence! (Unless you used a CD-RW). So it pays to get it right first go. Consider the following:

1. Do I want a menu on my bootable CD? (See Section 3.2 for more details)

2. Do I want to be able to boot from SCSI or IDE CD-ROMS or both?

3. Is this CD going to be used for backup or rapidly building computer systems?

Each requires a little fiddling around. You may want all of the above i.e. when you boot the CD (on SCSI or IDE) you are given the choice of restoring the current system or running a certain program.

It should be explained here what happens when you boot a CD-ROM (on proper hardware). First of all, your CD-ROM drive will become your A:\ (floppy) drive and your floppy drive will be shifted to B:\. Now, the boot image is examined and the system boots up. A directory listing on A:\ will reveal all the files you placed on your boot floppy. Hence the size of your boot image is limited to 1.44MB. What's the point of that? Can't a CD hold 650MB? Yes it can, but the first 1.44MB is taken up with the boot image. To access the rest, you must include the real mode drivers necessary to access your CD-ROM, such as CDROM.SYS. and MSCDEX.EXE. Then and only then will you be able to access the rest of your CD via your next available drive letter.

This is most important. The following is a step by step walk through on how to create a bootable floppy that will allow you to do this, that will form the basis for your boot image on your CD.

1. Create a bootable floppy. This will transfer system files such as COMMAND.COM, IO.SYS. This can be done in DOS or in Windows 95.

2. Copy to this floppy, MSCDEX.EXE and your real mode drivers for your CD-ROM. These are normally supplied on disk when you purchased your CD-ROM. If you do not have these drivers click here to download generic drivers. (From the Windows 98 CD). It is recommended you read this section on how best to use them.

3. Modify your CONFIG.SYS and AUTOEXEC.BAT files accordingly, so they load the drivers on startup. Click here to look at generic versions of these files.

4. Proceed to test your boot disk, as outlined in the following section.

>>>Testing your boot configuration

The best way to test your configuration is to reboot your system, using this newly created boot floppy. Note any error messages. Fix any typos in your CONFIG.SYS and AUTOEXEC.BAT files. These are the most common mistakes. If you included the real mode drivers correctly, you should be able to access your CD-ROM. Place a CD in and test it.

For a final test, make all the files on the floppy read only. This can be done using Windows Explorer (Properties), or by issuing the following command at the DOS prompt:

ATTRIB A:\*.* +R

Or simply write protect your floppy. This test will determine whether any of your drivers write to the disk. If they do you will get errors when you boot the system. You want to get rid of such drivers as they will not work when they are placed on CD. If you get errors, click here to download some generic drivers.

>>>Making the CD

1. Place your newly created and tested boot floppy in your floppy drive and start up Easy CD Creator.

2. Click File, CD Layout Properties. Change the volume name if you like, to say BOOTCD. Then click the Data Settings tab.

3. In the file system combo box, select ISO9660, then enable the Bootable checkbox by clicking it.

4. Then click OK. You will be prompted to put your bootable floppy in the drive. Click OK again.

5. Easy CD will read the boot information. Once done you should have two files in the CD Layout Window called BOOTCAT.BIN and BOOTIMG.BIN

6. Add any other files you wish to the CD. Note: These files can only be accessed when the real mode drivers fire up, assigning your CD-ROM to the next available drive letter.

7. Click the Record button on the toolbar to create your bootable CD.

(fra http://members.ozemail.com.au/~rossstew/drs/sec2.html#bk21)

Download filerne
ftp://haraldsen.dk/BOOT.ISO (bootfiler)
ftp://haraldsen.dk/WINISO53.EXE (winiso)

Åbn BOOT.ISO med WinIso
Højreklik i det tomme felt til højre, vælg "Add files"
Vælg din BIOS-fil
tryk ctrl+s (for at gemme)

Brænd iso-filen (så har du en bootcd med bios-fil)

sweet, onki :)

søgte efter noget lignende... dog uden held.

Hehe Nanoq ved godt du kom først med svaret men det var nu Onkis måde der hjalp mig, blev sku bange da jeg læste alt det man skulle Nanoq :D en hel ustyrlig måde og besværlig måde .. ! :D Så Onki får altså flest point her ;) håber det er iorden du !

Absolut helt iorden... :)

Onki takker for point.

Hejsa, jeg har prøvet at downloade ISO filen fra ONKI, men den er ikke tilgængelig mere. Jeg har problemet her:

http://www.eksperten.dk/spm/543890

Sagen er den at jeg ikke har noget A-drev hvorved det hele synes at blive megt meget sværere.......