GNU GRUB MULTI BOOT & RETRODOS 5.0 STARTUP MENU DEMONSTRATION скачать в хорошем качестве

GNU GRUB MULTI BOOT & RETRODOS 5.0 STARTUP MENU DEMONSTRATION

Demo.. shows Gnu Grub (Linux Mint setup) startup.. Linux Mint, Windows 7 (Also has 64 bit and 32 bit Windows 7 boot selection menu.. Because.. sda1 is Windows 7 System loader partition)... TRDOS 386 (logical drive volume boot sectors in extended dos partition, FAT16 and FAT32 fs) and RetroDOS (also in extended dos partition, FAT32 fs) boot/startup options... The Demo Computer's Harddisk (hd0, sda) MBR type partitioning is as: Partition1: Windows System (bootmanager) partition. NTFS. /dev/sda1 Partition2: Windows 7 - 64 bit. NTFS. (C:) /dev/sda2 Partition3: Windows 7 - 32 bit. NTFS (G:) /dev/sda3 Partition4: Extended DOS partition. /dev/sda4 Linux/Gnu Grub code is in /drv/sda1. (Linux Mint has been installed after 2 Windows'es.) ((Linux Grub BootRepair program is used.)) Logical dos drives in Extended DOS partition: /dev/sda5 : FAT16 FS. (Windows's D: disk) TRDOS 386 FAT16 boot sector. Kernel TRDOS386.SYS in root directory. /dev/sda6 : FAT32 FS. (Windows's E: disk) TRDOS 386 FAT32 boot sector (2 sectors, 80386 real mode code). Kernel TRDOS386.SYS in root directory. /dev/sda7 : FAT32 FS. (Windows's F: disk) RetroDOS 5.0 FAT32 boot sector (2 sectors, only 8086 code). Kernel PCDOS.SYS in root directory. /dev/sda8 : EXT4 FS. (Windows does not recognise it as logical disk). Linux Mint 22.3 XFCE Operating System. Gnu Grub loads this as default boot menu option. How TRDOS 386, RetroDOS 5.0 and Linux can be started from Extended partition: Gnu Grub starts (launches) Linux kernel directly (Linux does not use volume boot sector code) without using a Linux boot sector. (Volume boot sector is Zero filled empty in ext2/ext4 fs). Gnu Grub loads Windows or DOS (volume) boot sector code at 0:7C00h address. Applies MBR type Legacy Masterboot code rule. (Because.. The volume boot sector knows/assumes it is started at 0:7C00h.) TRDOS386 v2 and RetroDOS 5.0 volume boot sector codes are manually modified for Grub boot (launch) procedure. "Hidden sectors" field of the boot sector bpb contains physical (absolute) LBA sector address of the volume boot sector. (Normally, it was offset from the Extended Partition's start address. This address has been changed manually by using a disk editor program.) Note: Github/turkishrational repositories contain TRDOS 386 kernel source code and RetroDOS (all versions) kernel (and COMMAND.COM) source code and QEMU/VirtualBox bootable disk/diskette images. (+ sample programs/utilities, disk partitioning, formatting, disk image making programs and their source code).