YMF754-V ETC, YMF754-V Datasheet - Page 16

• Manufacturer Part Number: YMF754-V
• Description: DS-1E
• Manufacturer: ETC

YMF754
2C-2Dh: Subsystem Vendor ID
2E-2Fh: Subsystem ID
34h: Capability Register Pointer
b[15:0] ........Subsystem Vendor ID
b[15:0] ........Subsystem ID
b[7:0] ..........Capability Register Pointer
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.
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.
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”.
b15
b15
b7
Read Only
Default: 1073h
Access Bus Width: 8, 16, 32-bit
Read Only
Default: 0012h
Access Bus Width: 8, 16, 32-bit
Read Only
Default: 50h
Access Bus Width: 8, 16, 32-bit
b14
b14
b6
b13
b13
Capability Register Pointer
b5
b12
b12
b4
b11
b11
b3
b10
b10
b2
b9
b9
b1
Subsystem Vendor ID
-16-
Subsystem ID
b8
b8
b0
b7
b7
b6
b6
b5
b5
b4
b4
b3
b3
June 28, 1999
b2
b2
b1
b1
b0
b0