Subject: Reading CP/M disks Author: Prime Date: 12 Feb 2012 12:50 pm Hi all, I have some CP/M disks that where formatted on a BBC Z80 second processor running Opus DDCPM. I have booted up the original system and can read the diks on there without problems, vut would like to be bale to get the files off them to something more modern. The files I'm trying to extract are mostly either wordstar documents or Z80 and 6502 source files. Now the oddball thing about theese CP/M disks is that the first couple of tracks are FM / Single density whilst the rest of the disk is MFM / Double density. I have available to me a machine that I can boot into PC-DOS, Windows 98, Windows XP or Linux. I can scan the disks with Anadisk, and am able to read them on the PC's 5.25" 1.2MB drive, and have tried using the dump command within Anadisk to make a raw dump of one of the disks, which seemed to work ok. So is it possible to write a disk def for something like 22Disk or cpmtools to read the data off these disks. The specific details of the format I have availabe to me are : > Double density discs formatted with DDCPM: > > Tracks 0-2 formatted Single Density > Tracks 3-159 formatted Double Density > > Single density tracks are 10 x 256 byte sectors per track > Sector skew of 2 > > Double Density tracks are 10 x 512 byte sectors per track > Sector skew of 1 > Sector interleave of 2 > > CP/M allocation unit block size of 4k > 256 Directory entries (filenames) Cheers. Phill. |
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