#FBE3 Dobbertin Harddisc DMA, Interrupt
#FBE4 Dobbertin Harddisc Reset
Commands (incomplete list):
CMD_TESTREADY 0x00 test drive ready
CMD_RECALIBRATE 0x01 recalibrate drive
CMD_SENSE 0x03 request sense
CMD_FORMATDRV 0x04 format drive
CMD_VERIFY 0x05 read verify
CMD_FORMATTRK 0x06 format track
CMD_FORMATBAD 0x07 format bad track
CMD_READ 0x08 read
CMD_WRITE 0x0A write
CMD_SEEK 0x0B seek
== Other harddisc solutions for the CPC ==