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YMF754-R 数据表(PDF) 16 Page - YAMAHA CORPORATION

部件名 YMF754-R
功能描述  DS-1E
PDF  60 Pages
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制造商  YAMAHA [YAMAHA CORPORATION]
网页  http://www.yamaha.com
标志 YAMAHA - YAMAHA CORPORATION

YMF754-R 数据表(HTML) 16 Page - YAMAHA CORPORATION

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YMF754
June 28, 1999
-16-
2C-2Dh: Subsystem Vendor ID
Read Only
Default: 1073h
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Subsystem Vendor ID
b[15:0] ........Subsystem Vendor ID
This register contains the Subsystem Vendor ID.
In general, this ID is used to distinguish adapters or
systems made by different IHVs using the same chip by the same vendor.
This register is read only.
To
write the IHV’s Vendor ID, use 44-45h (Subsystem Vendor ID Write Register).
IHVs must change this
ID to their Vendor ID in the BIOS POST routine.
In case of the system such as Sound Card which BIOS can not control, this ID can be changed by
connecting EEPROM externally.
Then, Subsystem Vendor ID Write Register is invalid.
In case EEPROM is not externally, the default value is the YAMAHA's Vendor ID, 1073h.
2E-2Fh: Subsystem ID
Read Only
Default: 0012h
Access Bus Width: 8, 16, 32-bit
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Subsystem ID
b[15:0] ........Subsystem ID
This register contains the Subsystem ID.
In general, this ID is used to distinguish adapters or systems
made by different IHVs using the same chip by the same vendor.
This register is read only.
To write
the IHV's Device ID, use 46-47h (Subsystem ID Write Register).
IHVs must change this ID to their ID
in the BIOS POST routine.
In case of the system such as Sound Card which BIOS can not control, this ID can be changed by
connecting EEPROM externally.
Then, Subsystem ID Write Register is invalid.
In case EEPROM is not externally, the default value is the YAMAHA's Device ID, 0012h.
34h: Capability Register Pointer
Read Only
Default: 50h
Access Bus Width: 8, 16, 32-bit
b7
b6
b5
b4
b3
b2
b1
b0
Capability Register Pointer
b[7:0] ..........Capability Register Pointer
This register indicates the offset address of the Capabilities register in the PCI Configuration register
when 58-59h: ACPI Mode register, ACPI bit is “0”.
DS-1E provides PCI Bus Power Management
registers as the capabilities.
The Power Management registers are mapped to 50h - 55h in the PCI
Configuration register, and this register indicates “50h”.
When ACPI bit is “1”, this register indicates “00h”.



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