. (GitHub source for 0.4.6a ) 0.4.5c is an old stable release with no new features and some bugs (a=alpha, b=beta, c=release). I strongly recommend 0.4.6a. Grub4dos 0.4.6a complete command reference (originally in Chinese by Stephenldj, translated and regularly updated by me). use this to install grub4dos + many other useful functions. a universal multiboot solution based on grub4dos - just copy your ISO files to the USB drive and boot (also supports multi-UEFI booting and Secure UEFI-boot).
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). Grub4dos can boot an OS or executable from a 'flat file' structure or from disk image files or even ISO files.
![Color run background Color run background](/uploads/1/2/5/4/125464467/829363298.gif)
Run grubinst_gui.exe as administrator and install it to your USB stick. As the readme. Start -> All Programs -> Accessories -> Right click on 'Run as administrator' Type: DISKPART. The first thing I notice is that it can't quite play it back at the desired 24 FPS. I discovered that it. Set Background Image We should now.
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 worth getting to know it, if you are interested in making your own multi-boot drives. The RMPrepUSB download includes grub4dos. RMPrepUSB will install grub4dos onto a drive at the click of a button either to the MBR (Master Boot Record) or PBR (Partition Boot Record).
Tip: If in doubt, always install twice, to both MBR and PBR!. Download and install onto your Windows XP/Vista/Win7 system (always use latest Beta). 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. Insert a USB Flash memory pen drive (or USB hard disk) into the USB port of your Windows computer and run RMPrepUSB - set the following options: 1.
MAX size in MiB (1 MiB = 1024KB) 2. MEMTEST as a volume label 3. FAT16 (or use FAT32 if you have 2GB USB drive) + Boot as HDD (2PTNS) 5. Leave the COPY FILES box unticked 6.
Click Prepare Drive to format the USB pen (Note: you will lose all contents as it reformats the whole drive!). 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 you click on the 'Install grub4dos' button and grubinst.exe is run. 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.exe has run successfully. 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.lst file). The menu is in the form of a text file named menu.lst which is normally placed in the root of the drive. The search path that grub4dos uses to find a menu.lst file is.
Normally, Qemu does not allow BIOS sector writes (except to the MBR!) to the USB drive when it is mapped as a PhysicalDriveX on your computer (though no error will be reported as the drive is 'snapshotted' so that any writes are temporary only and cached) - i.e. Any physical drive mapped by Qemu will be treated as a read-only device because Windows locks the volume and no physical writes to the volume will occur. For this reason, if you are emulating DOS USB drives using Qemu, you may find it does not work as expected when writing files to the USB drive under DOS and then rebooting again (once booted under Qemu) or even within grub4dos (e.g. The savedefault command does not actually save anything!). If, however, you use the latest version of RMPrepUSB, writes will work as expected!
See also for how to boot from a USB drive in a VirtualBox VM ( much faster than QEMU!). You can prefix most colours with 'blink-' to make them flash. Note that blink only works in textmode (e.g. Graphicsmode 3) and not in a non-text (hi-res) graphics mode. Also you cannot have light blinking background colours, e.g.
Color blue/blink-light-blue will report back a parsing error; color blink-light-blue/blue is OK and so is color blue/light- blue. Equally color 0x91 will set blinking blue text on a blue background (i.e. Invisible!), whereas color 0x99 will set blinking light-blue text on a blue background. Nearly all grub4dos commands are (and must be) lower case (e.g. Root (hd0,0) is OK, but Root (hd0,0) or root (HD0,0) will give an error). Grub4dos filenames are not usually CaSe SeNsItIvE, but to be on the safe side always use the same upper and lower case letters to match the files on the USB drive (ext2/3/4 grub4dos volumes will be case sensitive). It is also recommended to use 8.3 filenames if possible (i.e.
Not long filenames) as you may get problems when booting OS's that do not cope well with long filenames such as MS-DOS or some ISO filesystems. 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. Note that the menu example above has a ' splashimage' statement. For older versions of grub4dos this command can only use a 14 colour 640x480pixel image to use as a background image (if you do not change the graphicsmode and leave it set to the default mode). For your 14-colour splashscreen image (if you have used a splashimage command), by default, the foreground colour (all of the menu text and the highlight for the currently selected option) will be white, and the background colour (the highlighted text within the currently selected option) will be black. This menu text will be laid over the background image.
You can also use Gimp to produce the.gz file. 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.gz from the drop down list beside the name of the file. Under Windows 7, I had some trouble with this method and could not get it to work (maybe you can!).