It’s probably also a good idea to use your existing DOSBox configuration as a starting point for the new one. I would recommend creating a new DOSBox configuration file for your MS-DOS installation, so that you can easily switch between configurations. There is a workaround for this which is mentioned in the “Advanced Topics” section. If you try to do this then certain nastiness will happen, such as the disk appearing to be much smaller than it actually is. You should also avoid creating a disk image larger than 504 MB, as this results in the number of cylinders being greater than 1024-above the limit which is supported by the disk access methods used by MS-DOS. In fact, bximage will use NTFS compression by default if it’s supported, and it’s a great space saver. Although a flat image results in the image taking up disk space equal to the size of the image, you can use NTFS compression if your disk is formatted using the NTFS filesystem. Using a flat image is very important, as this is the only format supported by DOSBox-growing images are not. The above command line tells bximage to use quiet mode (don’t prompt the user to confirm the details already provided), to create a hard disk image, to use a flat image file format, to give it a size of 250 MB, and to create the image at “ u:\mpayne\DOSBox\Images\Hard Disks\MS-DOS 6.22.img”. (The line is stored in your windows clipboard, use CTRL-V to paste) The following line should appear in your bochsrc:Īta0-master: type=disk, path="u:\mpayne\DOSBox\Images\Hard Disks\MS-DOS 6.22.img", mode=flat, cylinders=507, heads=16, spt=63 I wrote 261660672 bytes to u:\mpayne\DOSBox\Images\Hard Disks\MS-DOS 6.22.img. I will create a 'flat' hard disk image with The disk image can be created using bximage from the Bochs binary distribution (see the the “Advanced Topics” section for alternative methods): C:\Program Files (x86)\Bochs-2.4.5> bximage -q -hd -mode=flat -size=250 "u:\mpayne\DOSBox\Images\Hard Disks\MS-DOS 6.22.img" You will then use DOSBox’s internal boot command to boot from this image. Installing DOS in DOSBox requires that DOS be installed on a hard disk image. If you haven’t done so already, you’ll need to create the floppy disk images using a disk imaging tool and your original DOS installation disks.
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