M69000 Asiliant Technologies, M69000 Datasheet - Page 75
M69000
Manufacturer Part Number
M69000
Description
Manufacturer
Asiliant Technologies
Datasheet
1.M69000.pdf
(360 pages)
Specifications of M69000
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DEVCTL
read/write at PCI configuration offset 04h
byte or word accessible
accessible only via PCI configuration cycles
15-10
9
8
7
6
Note:
&+,36
15
Reserved
Each of these bits always return a value of 0 when read.
Fast Back-to-Back Enable for Masters
This bit applies only to PCI Bus masters. Since this graphics controller never functions as a PCI
Bus master, this bit always returns a value of 0 when read.
SERR# Enable
0: Disables the use of SERR# and the setting of bit 14 (Signaled System Error bit) in the Device
Status Register (DEVSTAT) to 1 as a response to an address parity error. This is the default after
reset.
1: Enables the use of SERR# and the setting of bit 14 (Signaled System Error bit) in the Device
Status Register (DEVSTAT) to 1 as a response to an address parity error.
Wait Cycle Control
This bit controls enables and disables address stepping. Since this graphics controller always
supports address stepping, this bit always returns a value of 1 when read.
Parity Error Response
0: Disables the use of PERR# as a response to detecting either data or address parity errors.
Disables the setting of bit 14 (Signaled System Error bit) in the Device Status Register (DEVSTAT)
to 1 as a response to an address parity error. This is the default after reset.
1: Enables the use of PERR# as a response to detecting either data or address parity errors.
Enables the setting of bit 14 (Signaled System Error bit) in the Device Status Register (DEVSTAT)
to 1 as a response to an address parity error.
Bit 8 (SERR# Enable) of this register must also be set to 1 to enable the use of SERR# and the
setting of bit 14 (Signaled System Error bit) in the Device Status Register (DEVSTAT) to 1 as a
response to an address parity error.
14
69000 Databook
13
Reserved
(0000:00)
Device Control Register
12
11
10
Subject to Change Without Notice
PCI Configuration Registers
Bk-Bk
Fast
(0)
9
SERR
Enbl
(0)
8
Wait
Cycl
Ctl
(1)
7
PERR
Enbl
(0)
6
Snoop
VGA
Pal
(0)
5
Inval.
Mem
Wrt /
(0)
4
Spec
Cycl
(0)
3
Revision 1.3 8/31/98
Mstr
Bus
(0)
2
Mem
Acc
(0)
1
Acc
I/O
(0)
0
7-3
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