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What is a recognition sequence and what is it good for?

Applies to: RIDE 1.5 and later

The recognition sequence defines the order of supported DOSes that try to recognize their filesystems on an image or inserted disk. The recognition sequence is fully adjustable, and here are two reasons why you might want to change it.

Reason 1. From time to time, you may run into a situation that an image or disk is misrecognized and accessed by the wrong DOS than expected. For instance, this image can be recognized as a TR-DOS 5.03 as well as GDOS image (its extension clarifies that it's a TR-DOS image, but extensions are not considered when recognizing an image). To prevent from misrecognition as a GDOS image, click on Disk → Recognition and make sure that GDOS gets crack on the image after TR-DOS does (as in the default recognition sequence).

Alternatively, you may want to exclude GDOS from the recognition sequence altogether to be sure that no TR-DOS image gets misrecognized as a GDOS image. But mind that in such case, no image will be recognized as a GDOS image, although it really would contain GDOS filesystem!

Reason 2. If you are sure you will never need to work with other but certain DOSes, you may want to keep only these in the recognition sequence and exlude the other ones from it. In the below example, only MDOS and MS-DOS images and disks are recognized. The benefit is that the recognition becomes faster, especially for physical floppy disks. The disadvantage is that images and disks with any other filesystems will be reported as unknown and open using the Unknown DOS.

You of course may return the formerly exluded DOSes back to the recognition sequence.

See also