Grub4dos 0. Note: Grub4dos 0. Also, be aware that your grub4dos menu. Therefore if you have any commands which expect two hard disks to be present, i.
Note that it does not alter the menu. If you wish to use a similar manual process using a Windows. The cygwin version of mkisofs. If this is still a problem then use oscdimg instead! Download the Makegrub4dos. Download mkisofs. Run a Windows Command Prompt window e. Start Menu — Accessories — Command Prompt.
To make an ISO, you need to make sure that the grldr file is present at the top level of your source folder. If all your boot files are in a folder, you can specify a source folder instead of a drive letter — e. Here are some alternatives which you can try:. Then click the green arrow button to test your new ISO file.
Unsupported embedUnsupported embed. Mkisofs may have a 4GB size limitation. The usual problems are due to the type of filesystem used for the ISO. When an OS boots, it may expect the files to have lowercase filenames or uppercase filenames.
If it looks like some files are not being detected by the booting OS, this may be the reason. Try Googling for someone with similar problems to see if you can modify the makegrub4dos.
Here are some points to watch:. So any reference to hd1 in a menu will cause an error. Check filenames are not case sensitive — e. There could be more than one CD device present in a system, the boot CD may not always be cd0. Here is an example of a menu that loads a DOS hard disk image file and boots it as a hard disk. If you are using splashimage with higher resolution images which is supported on versions of grub4dos , use the new color command see above.
You can use 7Zip or Gzip to create a compressed 14 colour. First download and install ImageMagick The conversion is quite good and probably better than you could do manually using a bitmap editor tool! Note: Splashimage also can load highly compressed.
Now get bmp2xpm. Find your. Then use 7Zip or Gzip to compress it as a. You can also use Gimp to produce the. You can reduce the colours in Gimp by selecting Image, Mode, Indexed and entering 14 as the maximum colors if it does not prompt you for the number of colours, select RGB and then select Indexed. Click Convert. Save this file as a XPM, then gzip it. Right-click the file and use 7zip — add to archive — choose. Under Windows 7, I had some trouble with this method and could not get it to work maybe you can!
With the newer versions of grub4dos included and used by RMPrepUSB , you can use bit colour or bit or bit colour images with splashimage. Note that the background colours for normal, heading, border and help text will be ignored as the background will always be set to transparent in graphics mode.
You can also use bit and bit colour values if the display is in graphics mode — e. The latest 0. Add the file to your menu. You can use a bmp file or a. An example using an lzma compressed file and the individual color statements see above for details about the color command syntax :. It is important to realise that not all systems can support high resolutions or all colour bit densities. For this reason, if you want your bootable USB drive to work on a variety of systems, you will need to either use the lowest common denominator e.
The graphicsmode command can be used in a menu. If you have some systems which do not support high resolution modes, you can use the best resolution with the correct image like this:. The command vbeprobe will list all the modes available on your particular system….
So you can determine the highest mode available by checking for the text in the output of vbeprobe — e. Note that you can check for just the x-resolution, or x and y-resolution or both x and y and color depth as well. You should modify the three green lines above as you wish. You can add more lines and match on xx16 and xx32 as well if you like.
Note : Latest version of grub4dos 0. The following section is for interest only and I suggest you use the inbuilt setmenu grub4dos command.
Please see Tutorial 71 and the menuset command for details. This sets the menu left position to 10, menu width to 50, the first menu item at row 5, 29 items per menu and help text starting at row Note : If you have a border around the menu, it will be drawn outside of the menu text area.
The horizontal lines of the border are drawn 1 line above and below the top and bottom of the menu text area. Therefore you must allow for 2 columns extra on the left, and 1 column extra on the top, bottom and right hand side of the menu text area for the border line.
If you require no border around the menu, or require the menu to be past column 78 over to the right of the screen then menuset will not work correctly. In this case use the menusetting utility click to download as follows:.
This requires the file menusetting. Test it out with QEMU first! This can be used to load a GNU Unifont hex file, but a graphicsmode or splashimage command must be used to change the display because special fonts require a graphics display mode rather than a text mode.
The unifont. It supports most of the entire unicode characters set which covers most languages and so it is quite large! Instead, you have to use the font command in between, to enable the loading of the second font…. You can also set a default menu item that will be pre-selected and also set a timeout value in seconds. Try these options as an experiment the special byte default file needs to be on your drive and can be downloaded from the Beta downloads section.
If you have more than 10 entries, grub4dos will still work — e. So you can have up to numbered entries The user can also use hotkeys e. F1, F2, etc. Maybe you do not want the grub4dos version number text and the grub4dos title at the top of the menu? As mentioned previously, grub4dos commands are case sensitive. The same rule applies for other keywords like map and root , etc.
Also the first command word must be at the very start of each line with no space or tab before it. Line 2 — the echo command is supported by later versions of grldr v0. Line 3 — the pause command will wait for a key press, if —wait is used it will only pause for the number of seconds specified or until a key is pressed Use the debug -1 command to suppress the seconds countdown if you prefer.
Line 4 — this line writes a grub4dos batch script to ram md. Grub4dos batch scripts must start with the text! The text ends with a 0 byte to show the end of the script code.
Setting B the second number to 1 will brighten the text colour. More examples if in graphics mode…. You can write coloured text to more than one position by writing a script which contains more than one echo line as below:.
If in a text mode, you can also create a box within the menu using special graphics characters in your menu. Yet another tip: If you find that you are constantly editing the menu. Make the first menu entry entry 0 reload the menu. Then all you need do is edit and save the menu. You can also test out different splashimages — just overwrite the bmp file with a newer version whilst emulating under QEMU.
You can number your entries consecutively starting from 0 or if you have a blank entry for the first menu title start from 1 1,2,3,4,etc. If you are having trouble getting the numbered menu items to work and have more than 10 entries, just remember to number the first five or so menus and make sure that you have a menu item which will be menu item 0 before menu item 1.
Menu item 0 can be a heading or a numbered 0 or un-numbered menu item, but menu item 0 must exist for the menu system to work properly when the user types the numeric keys. Also, make sure the first numbered menu items are present for example if you have 23 menu items, then menu items 0,1 and 2 must be present and numbered. If you want to have menu items numbered non-consecutively for some strange reason! Menu entries can also be auto-numbered. This is useful is using iftitle entries see below or if you want to add extra menu entries in the middle of your menu.
They can be patched out by using a grub4dos batch file. At the start of your menu. To just have a background bitmap displayed,. You can also add passwords to the menu. Adding a password under each title entry will prompt the user for that password when that particular menu item is run. You can also encrypt your password.
For example:. Note that adding a password line above the first title line also has the affect of suppressing the default grub4dos menu help text at the bottom of the screen for all menu entries. You can also generate an MD5 hash code from the grub4dos command shell using the command md5crypt , but you will have to manually type the hash code into your menu file as you cannot cut and paste it from the grub4dos shell window!
You can generate md5 hashes online here just use any salt you like. The menu below gives the user 3 seconds to press the ESC key no timeout is displayed, the screen is just blank for 3 seconds. If ESC is not pressed, then the submenu. If a key is pressed then the timeout will stop and the main menu menu. You can also require the user to enter a password after hitting F10 in order to get to the secret hidden main menu.
To determine what scan code you need for the any particular key combination, press c whilst in the grub4dos menu to get to the grub4dos command prompt, and then type. To have a single menu which contains some hidden entries that you can only see by pressing F10, use a menu. You will need to add the hotkey utility to the root of your USB drive which can be downloaded from here.
Note : To obscure the text in the menu. So before you go to the bother of reading this section, unless you really, really want to use GFXBoot, you should skip this section. Although GFXBoot is good for providing attractive high resolution and high colour backgrounds, the menu features are limited and are not as flexible as the grub4dos menu system.
Pressing F1 will produce some help mainly for linux users , F2 will allow you to change language but only English is available in the files I have provided. More info on GFXmenu can be found here. This is how to change it and have your own picture:.
The colours are specified in hexadecimal and are in three groups of two hexadecimal numbers — 0xrrggbb — 0x means that we are specifying a hex number, then we have rrggbb the first two numbers specify the red brightness, the second the green brightness and the third the blue brightness. Hexadecimal numbers can thus range from 00 which means 0 in decimal and thus off to ff which means in decimal and thus maximum brightness — here are some colours and their hexadecimal equivalents:.
Tip: You may have noticed that any error will make grub4dos go back to its default menu list when using a GFXMenu. Use the following lines at the top of the menu. Alternatively, omit the title line but not the other 4 lines of text and the grub4dos text-based menu will never be displayed — it will always load the GFXMenu, even after an error.
Now you can try some of the other tutorials on this website and add an extra menu entry into your menu. Just pick any tutorial that takes your fancy and add the menu entries into your existing menu. See the reference section at the top of this page. Note that some of these options are not available when using the GFXMenu menu system — i. I suggest that once you have your GFXMenu background working, you comment out the line for it in your menu.
The instructions above should allow you to make a nice user menu, but what do the commands in the menu. Lets look at what we have, now that you have added Ylmf to the USB drive:. What do these commands mean? The first line in each section begins with title xxxxx, and is fairly obvious! It is the text that is presented to the user as a menu item. The second line in all these examples is a find —set-root command. Note that this command can cause problems if you happen to have the file it is looking for on both your hard disk and your USB pen.
It is often better to create a file with a unique name e. When grub4dos finds the file, it sets the current search path to that path — for instance if you had. Possible devices are u,p,n,h,f,c. If no floppy drive or cd drive is present, then using the —devices switch to force grub4dos to search those devices may cause long timeouts of several minutes! See the bottom of this page for how to avoid this. The next line is a map command. BIOS devices are numbered where are floppy disks fd0-fd3,0xx9F are hd0-hd31, cd0 is 0xA0, etc.
Here are the grub4dos device references and numbers:. A detailed explanation of these map ped virtual device names and lots more can be found here. The map command takes effect when grub4dos comes to the end of a menu entry or executes the boot command.
It will also take effect immediately within grub4dos if a map —hook command is executed. It is important to understand how grub4dos maps your image.
If this code tries to access a floppy disk drive, it will be accessing your image file instead. If you are having single operating system that is Windows 10 on your computer follow the below method to fix your issue. I suggest you to download Windows 10 ISO file, create an installation media from other working computer to perform automatic repair of the computer that you are unable to boot.
Step 1: Download Windows 10 from the below link and create media creation tool:. Step 2: After creating the tool perform a Start up Repair. I would like to inform that, if your Windows 10 is not able to boot or startup, Startup Repair will come into action and try to diagnose and fix the issue.
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