Emerson MVME147 Computer Hardware User Manual


 
Initiator Role Custom Packet
2-13
2
$1E xxxxxxxx xxxxxxxx Message-in length --
bytes expected
during message-in
(max=258 for
extended
messages)
$20 xxxxxxxx xxxxxxxx Message-in pointer
(MSW) -- to RAM
buffer where
firmware stores
received
messages
$22 xxxxxxxx xxxxxxxx Message-in pointer
(LSW)
$24 xxxxxxxx xxxxxxxx Message-out length --
bytes expected
to be transferred in
message-out phase,
has to be non-zero if
message-out phase
is required (max=258
for extended
messages)
$26 xxxxxxxx xxxxxxxx Message-out pointer
(MSW) -- to RAM
buffer where
firmware takes
messages to
transfer to TARGET
$28 xxxxxxxx xxxxxxxx Message-out pointer
(LSW)
$2A xxxxxxxx xxxxxxxx Reserved
$2C xxxxxxxx Reserved
..
..
..
$60 xxxxxxxx xxxxxxxx Sector number in
error (MSW)