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abnormally and the ODD makes OR-operation to its self-diagnostics results of unit 0 (Device 0)
with X'80' and sets it in the Error register. If device 1 ends abnormally, the ODD sets the CHECK
bit of the Status register.
When the ODD is device 1
The ODD asserts the PDIAG- signal within five seconds. It sets X'01' in the Error register and
ends the command.
Table 4.26 Self-diagnosis detailed code
Detailed code Meaning
01h Normally end
02h-7Fh Hardware error
(For power-on and hardware reset only)
8xh Device 1 ended abnormally. (For device 0 only)
4.5.6 GET MEDIA STATUS (X'DA')
Table 4.27 GET MEDIA STATUS command
Bit
76543210
CM11011010
DHXXXDRVXXXX
CHXXXXXXXX
CLXXXXXXXX
SNXXXXXXXX
SCXXXXXXXX
FRXXXXXXXX
The GET MEDIA STATUS command respond with the ODD status.
The command ends abnormally in either of the conditions given below and sets the value shown in
Table 4.28 in the Error register.
! When no media is inserted
! When media is exchanged
! When the Eject switch is pressed
! When media is write-protected