// .DMK - David M Keil’s disk format. A low-level disk image file format used by TRS-80 Model I & Model III, 
//        Tandy Color Computer, Dragon 32 & 64, and MSX emulators
//
// https://electrickery.hosting.philpem.me.uk/comp/trs80-4p/dmkeilImages/trstech.htm
// https://retrocomputing.stackexchange.com/questions/15282/understanding-the-dmk-disk-image-file-format-used-by-trs-80-emulators
// http://cpmarchives.classiccmp.org//trs80/mirrors/www.discover-net.net/~dmkeil/coco/cocotech.htm
// https://archive.worldofdragon.org/index.php?title=Tape%5CDisk_Preservation#DMK_File_Format
// https://github.com/lutris/openmsx/blob/master/doc/DMK-Format-Details.txt
//