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Chapter 2
Decoder Command Set Guide
SCSI Decoder Command Set
This command set for the Vela CineCast HD decoder family performs per the
SCSI-2 Standard. Contact Vela for the latest firmware revision and complete
information on the command set, if needed.
SCSI Command Sequence from Power-up, SCSI
Reset, or Bus Device Reset
The CineCast HD decoder will report Check Condition to the first SCSI com-
mand (excluding
INQUIRY
and
REQUEST
SENSE
). The host adapter (initiator), after
seeing the check condition, should respond by performing a
REQUEST
SENSE
.
Per SCSI recommendations, the initiator should renegotiate for synchronous data
transfers and wide transfers. This is done to enable hot swap capability and proper
negotiation for Sync and Wide data.
The decoder will report Check Condition for all commands except
INQUIRY
and
REQUEST
SENSE
from a Power-up, SCSI Reset, or Bus Device Reset.
SCSI Command Name
Operation Code
SCSI-2 Section Number
Inquiry
12h
8.2.5
Mode Sense
1Ah
8.2.10
Decoder Command
45h
Custom Command
MPEG Play
A5h
Custom Command
Read Capacity
25h
9.2.7
Request Sense
03h
8.2.14
Test Unit Ready
00h
8.2.16
MPEG Write (10)
2Ah
9.2.21
Write Buffer
3Bh
8.2.17
Table 2-1. Command and Status Processing List
Summary of Contents for 2000-0600
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