Pioneer SCSI-2 - Manual (Page 112)

Read CDP
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2.25 Read Drive Status (E0h)
Operation Code is (E0h)
PCF (Page Control Field) indicates the type of Page Parameter to be returned.
00b : Current Value
01b : Reserved
10b : Reserved
11b : Reserved
Page Code indicates contents of the Page Parameters.
01h : Drive Status
02h : Audio Play Status
Others : Reserved
The READ DRIVE STATUS command requests the drive to report its specific drive status to the
initiator.
The drive terminates the DATA IN phase when Allocation Length bytes have been transferred or
when all available Drive Status data has been transferred to the initiator. When Allocation
Length is set to 0, no data is returned. This does not cause a Check Condition.
Page Parameters
Each Page Parameter data is preceded by a header of 3 bytes defining the Page Code and
Page Length of the page.
Page Length is the number of bytes of status data following the Header
Page Code 01h
The drive will return 16 bits of Drive Status data. Bit 0 is the least significant bit.