For those who are still looking for ATR-8000 CP/M system disks, I found them here: http://www.retroarch...tari/index.html
Link for other CP/M bootdisks: http://www.retroarchive.org/maslin/
Here is all of Don Maslin's stuff: http://www.classiccm...oftware/maslin/
You need an old MS-DOS machine with a 360K floppy drive (and a good controller), and the TeleDisk program here: http://www.classiccm...06/teledisk.htm
Hope this helps.