Quantum ATL SuperLoader ATL, Руководство пользователя

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Chapter 2 Messages
Message Format
10 Quantum ATL SuperLoader Software Interface Guide
If an initiator supplies an unsupported message, for example,
COMMAND COMPLETE or a reserved or undefined message
code, the SuperLoader returns a MESSAGE REJECT message and
continues where it left off, possibly returning to MESSAGE OUT if
ATN is raised.
The first byte of the message, as defined in
table 1 , determines the
format of the message.
Table 1 Message
Format
The SuperLoader supports the messages listed in table 2 . The
message code and the direction of the message flow is also
included in the table (In = target to initiator, Out = initiator to
target).
Table 2 Supported
Messages
Message Code Message
00h One-byte message (COMMAND COMPLETE)
01h Extended message
02h – 1Fh One-byte message
20h – 2Fh Two-byte message
40h – 7Fh Reserved
80h – FFh One-byte message (IDENTIFY)
Message Message Code Direction
ABORT 06h Out
BUS DEVICE RESET 0Ch Out
COMMAND COMPLETE 00h In
DISCONNECT 04h In Out