Extracting CDOS files

Hi Chuck, Thanks for the suggestions. I was told that these are DSDD CDOS diskettes, and reading them with ImageDisk gives me double density on both sides except for the first track which is single density. The shareware 22disk has four Cromemco types: CRO1 Cromemco CDOS - SSSD 48 tpi 5.25" CRO3 Cromemco CDOS - SSDD 48 tpi 5.25" CRO4 Cromemco CDOS - DSDD 48 tpi 5.25" CRO6 Cromemco CP/M - SSDD 48 tpi 5.25" Of these, CRO4 (and only CRO4) gives me what looks like a readable directory with reasonable filenames. However it reports that files have cross-linked blocks. Masking out pin 8 (Index) on the 34-pin connector has no effect, I still get: Error reading diskette B: (Cyl 1, Side 1, Sect 1) Sector not found This sector DOES exist, both ImageDisk and TeleDisk can read it fine, however no amount of "Retry" will convice 22disk to read it. I'd try my hand at extracting the files from the images, however this isn't going to be easy due to the "invisible" sector interleaving... hopefully the tables in the back of the CDOs manual are correct. Unfortunately ALL the files on the three sample disks I have are binary in nature, so I can't easily tell if I actually got the right data (as you usually can with a readable text file). Dave -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.classiccmp.org/dunfield/index.html