Byte 0: Operation Code (1Dh)

Byte 1: Ignored Bit 7 to 5, PF(1) Bit 4, Reserved Bit 3, SelfTest(0) Bit2, DevOfl(0) Bit 1, UnitOfl(0) Bit 0

Byte 2: Reserved

Byte 3 to 4: Parameter List Length

Byte 5: Control Byte (00h)

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