LSI Logic Confidential
ATAPI Interface
14-5
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
DVD Control Register
Cbus Address: 0xFB0000
AtapiData
[31:16]
ATAPI Read/Write data. For the ATAPI_RD command,
this field contains the value read from the ATA register
indexed by AtapiAddr. For the ATAPI_WR command, this
field contains the value to be written to the indexed ATA
register.
AtapiIEn
12
ATAPI Interrupt Enable. When this bit is set and
AtapiIntRq changes from 0 to 1, an ATAPI Completion
interrupt is generated.
AtapiAddr
[11:7]
ATAPI Register Address. This field corresponds to pins
CS0, CS1, DA2, DA1 and DA0. CS0 is the most
significant bit.
AtapiInt
6
ATAPI Interrupt Request. Software can monitor the status
of DoMiNo’s ATAPI_INTRQ input pin by reading this
read-only bit. External devices will set this bit to indicate
the completion of ATAPI operations.
31
16
AtapiData
15
13
12
11
7
6
5
2
1
0
Reserved
AtapiIEn
AtapiAddr
AtapiInt
Cmd
Int
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