Yamaha YMF724F 2C-2Dh Subsystem Vendor ID, 2E-2Fh Subsystem ID, 34h Capability Register Pointer

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YMF724F

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: 000Dh

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, 000Dh.

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-1 provides PCI Bus Power Management registers as the capabilities. The Power Management registers are mapped to 50h - 57h in the PCI Configuration register, and this register indicates “50h”.

When ACPI bit is “1”, this register indicates “00h”.

September 21, 1998

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Contents Overview FeaturesLogos GM system levelSensaura YMF724F-V PIN ConfigurationPIN Description PCI Bus Interface 53-pinYMF730AC-2 Interface 6-pin YMF727AC3F2 Interface 9-pin Spdif Interface 1-pinLegacy Device Interface 16-pin Miscellaneous 15-pin Power Supply 39-pinOPL3 Block DiagramDOS VM System DiagramFunction Overview PCI Bus CommandPCI Configuration Register 04 05h Command 00 01h Vendor ID02 03h Device ID 06 07h Status 0Bh Base Class Code 08h Revision ID09h Programming Interface 0Ah Sub-class Code0Dh Latency Timer 0Eh Header Type10 13h PCI Audio Memory Base Address 2C-2Dh Subsystem Vendor ID 2E-2Fh Subsystem ID34h Capability Register Pointer 3Fh Maximum Latency 3Ch Interrupt Line3Dh Interrupt Pin 3Eh Minimum Grant40 41h Legacy Audio Control B76 ..........SDMA Sound Blaster DMA-8 Channel Select B108 ........SBIRQ Sound Blaster IRQ Channel SelectB1311 ......MPUIRQ MPU401 IRQ Channel Select 42 43h Extended Legacy Audio Control B1413 ......SBVER SB Version Select B1211 ......SMOD SB DMA modeB15..............IMOD Legacy IRQ mode 44-45h Subsystem Vendor ID Write Register4A-4Bh DS-1 Power Control Register 46-47h Subsystem ID Write Register48-49h DS-1 Control Register PSN Power Save PCI Audio block DPLL1 Disable PLL1 Clock OscillationPSL0 Power Save Legacy Audio Block PSL1 Power Save Legacy Audio BlockB12..............PR4 AC-2 Power down Control B13..............PR5 AC-2 Power down ControlB1514 ......AC-2 Power down Control 6 50h Capability ID 4C-4Dh D-DMA Slave Configuration51h Next Item Pointer 52-53h Power Management CapabilitiesB0................ACPI Acpi Mode Select 54-55h Power Management Control / Status58-59h Acpi Mode B10 ..........PS Power StateOPL3 ISA Compatible DevicePCI OPL3 Status Register RO OPL3 BlockOPL3 Data Register Array 1 R/W OPL3 Data Register Array 0 R/WSound Blaster Pro Block CMD Sound Blaster Pro Mixer SB Mixer AC-2 Sbpda Sound Blaster Power Down Acknowledgement B0................SBPDR Sound Blaster Power Down RequestSE Scan Enable SM Scan ModeB0................SBI SB Interrupt Flag F1h Scan In/ Out DataF8h Interrupt Flag Register B70 ..........SCAN DataJoystick MPU401PC/PCI DMA Emulation ProtocolDMA Interrupt Routing Digital Audio InterfaceSerialized IRQ Hardware Volume Control Absolute Maximum Ratings Electrical CharacteristicsDC Characteristics Master Clock ResetPoint to Point Input Hold Time for Pciclk PCI InterfaceAC-link AC-2 / AC3F2 Master ClockInput Hold Time for Abclk AC3F2 InterfaceAC3F2 Control Interface timing OFF External DimensionsYamaha Corporation