mfm_command
error = mfm_command(DKC_CMD_SEEKREADID | 0x04); /* step=1, verify=0 */
error = mfm_command(DKC_CMD_SEEKREADID | 0x04);
error = mfm_command(DKC_CMD_DRSEL_RX33 | unit);
error = mfm_command(DKC_CMD_DRSEL_RX33 | unit);
error = mfm_command(DKC_CMD_STEPIN_FDD);
error = mfm_command(DKC_CMD_STEPOUT_FDD);
error = mfm_command(DKC_CMD_DRSEL_RX33 | unit);
error = mfm_command(DKC_CMD_DRSEL_HDD | unit);
mfm_command(cmd);
(void)mfm_command(DKC_CMD_WRITE_RX33);
(void)mfm_command(DKC_CMD_READ_RX33);
(void)mfm_command(cmd);
(void)mfm_command(cmd);
mfm_command(DKC_CMD_DRDESELECT);
static int mfm_command(int cmd);