4 - implemented on port 0x0F:
5 --- write track number (0..191)
8 --- 44 tracks reserved for CPM.SYS
10 - create/populate image with
11 --- mkfs.cpm -f romdisk -b cpm.sys <image>
12 --- cpmcp -f romdisk <image> <hostfile> <user>:
26 /etc/cpmtools/diskdefs: