Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 397)

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Processing of Extended Message Out

Figure D-5 shows how Extended Message Out messages are

processed. Note that the Attention signal must coincide with the

message byte numbering sequence. The CTS responds to the

initiator’s Synchronous Data Transfer Request with a transfer period

of xx or 32h (200 nanoseconds), whichever is larger (slower), and a

REQ/ACK offset of yy or Bh (11), whichever is smaller.

Parity Error in Extended Message Out

When parity checking is enabled and the CTS detects a parity error in

the Synchronous Data Transfer Request message received from the

initiator, the CTS stays in the Message Out phase until the Attention

signal goes low. Then, it goes to the Message Out phase again to

request that the initiator reissue the entire message sequence.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

D-11

Appendix D SCSI Bus Message Processing and Error Recovery

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