The memdisk file and the disk image need to be present in the appropriate location (for PXELINUX, on your TFTP server, for ISOLINUX, in the /isolinux directory on your CD, etc. where, of course, hdt.img is the name of the disk image file. You can use MEMDISK straight off the boot loader command line like the following: This patch enables AHCI and NVMe support for Grub4DOS 0.4.5c and can speed up transfer rates if an image file is mapped to RAM and may be loaded from an SSD or NVMe M2 SSD. In the next examples hdt.img is a floppy image ( hdt.iso is a ISO image) containing Hardware Detection Tool (runs directly on SYSLINUX) and dosboot.img is a floppy image that contains some version of DOS. Download Grub4DOS AHCI / NVMe patch for free. The disk image, passed as initrd, can be a compressed zip or gzip file. As far as the bootloader is concerned, MEMDISK is the "kernel" and disk image is the initial ramdisk (initrd). You need a disk image as well as the memdisk file itself. MEMDISK is an auxiliary module used in conjunction with a boot loader that can load linux kernels (EXTLINUX/ISOLINUX/PXELINUX/SYSLINUX, grub, grub4dos grub2.
GRUB4DOS BOOT IMG FILE DRIVER
MEMDISK simulates a disk by claiming a chunk of high memory for the disk and a (very small - 2K typical) chunk of low (DOS) memory for the driver itself, then hooking the INT 13h (disk driver) and INT 15h (memory query) BIOS interrupts. MEMDISK can boot floppy images, hard disk images and some ISO images. MEMDISK is meant to allow booting legacy operating systems. 5 MEMDISK and generic El Torito CD-ROM driver for DOS.4.5 Enable/Disable BIOS Enhanced Disk Drive Services.4.3 Write protected floppy and hard disk images.4.2 Set memory access method (raw, bigraw, int, safeint).4.1 Specifying geometry and image type manually.3.4.3.2 - memdiskfind in combination with phram and mtdblock.3.4.3.1 - Passing ISO parameter to the kernel.
GRUB4DOS BOOT IMG FILE DRIVERS
3.4.2.1 - Drivers that detect the MEMDISK mapped floppy/disk/ISO image.
3.4.1 Real mode operating systems and boot loaders that use INT 13h BIOS calls.3.4 INT 13h access: Not all images will complete the boot process!.IMG (fd0) map -hook chainloader (fd0)+1 rootnoverify (fd0). 2.1 EXTLINUX/ISOLINUX/PXELINUX/SYSLINUX The configuration file is used to script boot options the default menu is text based.