Dual-booting all versions of Windows and Linux
Dual-Boot Windows 7 and MS-DOS 6.22
|October 2013: This is the new location for this page on this site. Please update your link or bookmark.|
This guide shows how to create a natural dual-boot of any version of Windows 7 (NTFS) and MS-DOS 6.22 (FAT) provided you start fresh and install Windows 7. You then run either OS by selecting one from a Windows 7 menu during bootup.
If you prefer not to clean install Windows 7 with loss of all data except your backup, then go to this page first.
In all methods MS-DOS 6.22 must be installed on the start of the first primary partition of the first hard disk
A full Windows 7 installation DVD is essential because you will execute a clean installation of Windows 7 on the 2nd/3rd partition of the first hard disk (the 1st partition is for MS-DOS 622). A Repair or Recovery disk will not work.
All versions of Windows 7 were used in testing. The computers used were:
(1) 64-bit Dell Studio XPS 8100 (2.93 GHz), Core i7, 8 GB RAM DDR3, NVIDIA GeForce GTX 460, 2x1 TB SATA hard disks
(the two hard disks, configured as RAID 0, were replaced with a SATA 1 TB disk and then RAID Mode was changed to ATA in the BIOS).
(2) 64-bit AMD Athlon (2.4GHz), 2.0 GB RAM, 1 TB SATA hard disk (no BIOS change required).
(3) 32-bit Dell Optiplex with Pentium 4 (2.26GHz), 2.0 GB RAM, 160 GB ATA hard disk
MS-DOS internal and external commands work correctly on both 64-bit and 32-bit computers. The USB keyboard and USB laser mouse do run from MS-DOS 6.22 on a 64-bit computer. However, MS-DOS 6.22 will not run from RAID configurations. Also, MS-DOS 6.22 device drivers are not available for 64-bit hardware devices so expect those devices not to work on 64-bit computers when DOS 6.22 is running.
When testing with 600+ MB of free Conventional memory, Space Quest 3 (1993), SQ4, SQ5 and X-Com2 were installed in DOS 6.22. All ran well on both 64-bit and 32-bit computers - exactly as would be expected for 1993/5 software.
The procedure is suitable for experienced computer users.
EasyBCD version 2.0.2:
EasyBCD is a highly-acclaimed free utility that allows any user to easily enter a new OS option in the Windows 7 boot menu. The earlier 2.0 version of EasyBCD must be used as newer versions did not work in this specific situation.
How to create a Windows 7 and MS-DOS 6.22 Dual-Boot
Installing other operating systems on your Windows 7 computer may invalidate your warrantee.
MS-DOS 6.22 must be installed on the first (Primary) partition of the first hard disk. It will NOT be Active!
Make your preparations
Install Windows 7 and MS-DOS 6.22
Congratulations! You have created a natural dual-boot of Windows 7 and MS-DOS 6.22.
Footnote: EasyBCD 2.0 creates an NST folder on the Windows 7 partition when it adds an operating system to the Windows 7 boot loader menu. This NST folder contains file(s) vital to booting an added OS. It must not be deleted.
Please remember that you alone are responsible for the consequences of any changes you make to your computer hardware or software.
Copyright © LarryM 1998-2015 email@example.com