diskdef mon_80_16 seclen 256 tracks 80 sectrk 16 blocksize 2048 maxdir 64 skew 4 boottrk 3 os 2.2 end diskdef mon_160_8 seclen 512 tracks 160 sectrk 8 blocksize 2048 maxdir 128 skew 1 boottrk 2 os 2.2 end