In this archive:I just did _ Ctrl+S _ in SeaMonkey browser on Grub4dos Guide – Map Command and APPENDIX – Commands + on Abstract. Focus on how to use the latest (v) grub4dos with SYSLINUX. No historic, or DOS/Windows specific information included. Page 1 of 5 – Grub4dos Guide/Tutorial – posted in Grub4dos: After edit it in “real English” and add to the guide a complete set of instructions.

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T his guide contains many new and previously undocumented features! I highly recommend that you download and use one of these versions of grub4dos 0.

Latest grub4dos downloads GitHub source here for 0. I strongly recommend 0. Grub4dos command primer – Grub4dos 0.

New – get the E2B eBooks! Read more at http: This tutorial is an introduction on manaul to make a bootable grub4dos USB drive. Grub4dos allows you to make a multiboot multipass drive. When you boot from a bootable drive that contains the grub4dos bootloader, you are normally presented with a menu which allows you to boot from any OS or other program such as grub4dod memory test program that you have copied to the drive.

Grub4dos boot code can be installed either onto the MBR Master Boot Record, on the first sector of the disk and boot track first track of a drive, or the partition boot record. It consists of two parts or stages. The first part is the boot code which is in the first sector and some of the following sectors of the boot drive or partition.

Once this code is run by the CPU, the code then looks for a file called grldr. The grldr file needs be in the root and on the same boot partition if the boot code is installed onto the partition boot record PBR – start of the partition.

If the boot code was installed onto the MBR, then the root of all devices will be searched to find the grldr file.

Grub4dos Guide – Gfxmenu

See here for more details. Grub4dos can boot an OS or executable from a ‘flat file’ structure or from disk image files or even ISO files. It can even load images into memory ram drive and run the OS from there!

Grub4dos is used in most of my tutorials and is well manjal getting to know it, if you are interested in making your own multi-boot drives. Most of the tutorials on this website use grub4dos. Grub4dos can run grub4dos batch files which must start with! BAT and grub4dos executables and supports environment variables. It is a very powerful environment grub4ros is under constant development and improvement by chenall, tinybit, yaya and many others.


There is an active forum on reboot. By convention, grub4dos programs may have the file extension. If you have never used grub4dos before, I will give you a quick ‘How to’ mxnual so you can make a working USB pen drive manua, which you can experiment.

Always use the latest RMPrepUSB version which will include gub4dos recent version of grub4dos or obtain the recommended grub4dos grldr grub4cos. I recommend that you always use the latest version of RMPrepUSB to install grub4dos rather than using grubinst or bootice for two reasons: If you are having problems booting to grub4dos on some very old systems try FlashBoot to prepare your USB drive. Latest grub4dos downloads GitHub source here older http: Tutorial 71 – Grub4dos utilities Wenv, hotkey.

Tutorial 60 – Grub4dos and Plop! Grub4dos internal variables and Functions Lots of menu. Sample background menus here. Tutorial 57 – Automatic grub4dos menus, using hotkeys, hiding the menu and silent startup Look here for advanced example menus and downloads including unifont to support UTF. There is a portable version if you prefer this though the full version adds no system drivers and is easy to completely uninstall should you want to.

Linux users can install grub4dos using BootIce.

Grub4dos Guide – Gfxmenu

Some systems give a ‘flashing cursor’ when they boot from grub4dos installed to the MBR. Note that grub4dos consists of two parts as explained previously. Part 1 is the boot code which does not actually exist as a file and so cannot be easily seen. It’s code can be located either in the Master Boot Record first 31 sectors on a disk or in the Partition Boot Record first sectors at the start of a partition.

This is written to the disk when manuap click on the ‘Install grub4dos’ button and grubinst. Part 2 is the main grub4dos code which is loaded by the Part 1 boot code. Part 2 is just the file grldr which should be located in the root of your bootable drive partition.

This grldr file is copied from the RMPrepUSB application folder to the target drive when you click on the ‘Install grub4dos’ button and after grubinst.

If you wish to use a different version of grub4dos, simply replace the grldr file on the USB boot drive with your different grldr file. Once the the glrdr file loads into memory and runs, grub4dos will look for a menu file to parse and run grldr includes a pre-boot configfile which then looks for a menu.

The menu is in the form of a text file named menu. The search path that grub4dos uses to find a menu. The grldr file contains it’s own small pre-boot menu bytes which includes the commands to search for the menu. This embedded menu can be changed if you wish. You can type in most of the grub4dos commands at the grub4dos command prompt such as help. A menu file consists of two sections – all commands before the first title command are executed, in sequential order, as soon as the menu file is loaded.

When the first title command is found, any further lines are interpreted as menu entries each menu entry starts with a title command word followed by one or more command lines.


If your menu uses iftitle commands, all iftitle [xxxxx] lines are evaluated and any commands inside the [ When a user selects a menu entry and presses [Enter], the commands below the title command are executed by grub4dos until the next title command is found or the end of file is found. When the next title command is found or the end of file is reached grub4dos will automatically issue a boot command and CPU control will be passed to whatever code was loaded by the previous menu instructions.

Hak5 video on menu. Part 2 – Testing your USB pen drive.

Grub4dos Guide/Tutorial

We now need to test your USB pen drive to see if it boots. You should now see a BIOS boot screen window appear briefly and then a window like this: It is possible to spice up this menu and make it look better. Let us change the text and background colour, set a second timeout, set a default menu choice if no key is pressed and add a background grubdos using a. There must be no spaces at the end of the colour values e. A line starting with is a comment line – text which follows a symbol or pretty much any character!

It is best to avoid grub4dod commands and use the color command instead – see below. The XPM format for splashimage is no longer supported by grub4dos. You can prefix most colours with ‘blink-‘ to make them flash. Note that blink only works in textmode e. Also you cannot have light blinking background colours, e. Equally color 0x91 will set blinking blue text on a blue background i. If you issue the command echo -h at the grub4dos command console, all the possible values from 0x00 to 0xff are listed in a table: Later grkb4dos of grub4dos June and later can also understand ,anual colur settings, e.

You can use a manhal value to set both the highlight background colour and the text colour: Only the standard and highlight colours accept a background colour setting. For commands that are above any menu title command i.

For lines which follow after a ‘title’ line, white space and graphics characters are ignored unless they follow a command word – e. Nearly all grub4dos commands are and must be lower case e.

It is also recommended to use 8. Also be aware that files within a CD or ISO image may be uppercase when accessed by grub4dos, even if they appear as lowercase when viewed in Explorer.

Long filenames that have spaces in them e. A File Name with Spaces. If the file ‘A File with Spaces. If you just want to add a nice background, skip the next bit and jump to the ‘ High Colour and High Resolution Backgrounds ‘ section below.