Philips SAA7785

ThunderBird AvengerTM PCI Audio SAA7785

Accelerator

Philips Semiconductors Preliminary Specification

1999 Nov 12 35

TABLE 13 Status Register - Status (RO/RW)

9 FBACK_ENB RO Fast Back-to-Back Enable: the SSA7785 ThunderBird Avenger™, function 0

does not support fast back to back master cycles therefore this bit always

returns a zero.

8 SERR_RESP RW System Error Response: When set to 1, the SSA7785 ThunderBird

Avenger™, function 0 responds to detected PCI bus address parity errors by

asserting SERR#. When 0, the SSA7785 ThunderBird Avenger™ ignores

these errors.

7 STEPPING RO Address / Data Stepping: Always returns 0.

6 PERR_RESP RW Parity Error Response: When set to 1, the SSA7785 ThunderBird Avenger™,

function 0 responds to detected PCI bus data parity errors by asserting

PERR#. When 0, the SSA7785 ThunderBird Avenger™ ignores PCI bus data

parity errors.

5 SNOOP_ENB RO VGA Snoop Enable. The SSA7785 ThunderBird Avenger™, function 0 does

not support VGA snoop enable, therefore this bit always returns a zero.

4 MEM_INV_EN RO Memory Write and Invalidate Enable: Always returns 0.

3 SPEC_CNTL RO Special Cycle Control: Controls the devices ability to respond to Special

Cycle Operations. A value of 0 causes the SSA7785 ThunderBird Avenger™,

function 0 to ignore all Special Cycles.

2 MAST_CNTL RW Master Control: Controls the devices ability to act as a master on the PCI bus.

A value of 0 disables the ability of the SSA7785 ThunderBird Avenger™,

function 0, to act as a primary PCI master. A value of 1 enables the Thunder-

Bird Q3DIII, function 0 to become a PCI bus master.

1 MEM_CNTL RO Memory Response Control: The SSA7785 ThunderBird Avenger™, function 0

does not support target memory cycles therefore this bit always returns a

zero.

0 IO_CNTL RW I/O Response Control: Controls the SSA7785 ThunderBird Avenger™, func-

tion 0’s response to I/O space. A value of 0 disables the device response. A

value of 1 allows the device to respond to I/O space accesses.

PCI CFG 0 D15 D14 D13 D12 D11 D10 D9 D8

Offset 06h

R_PERR S_SERR SM_

ABORT

RT_

ABORT

ST_

ABORT

DEVSEL_TMG S_PERR

POR Value00000010

D7 D6 D5 D4 D3 D2 D1 D0

BK2BK

UDFMHz66RRRRR

POR Value10000000

Bit Name R/W Function