Yamaha YMF744B (DS-1S) 34h Capability Register Pointer, 3Ch Interrupt Line, 3Dh Interrupt Pin

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YMF744B

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-1S 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”.

3Ch: Interrupt Line

Read / Write

Default: 00h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Interrupt Line

b[7:0] ..........Interrupt Line

This register indicates the interrupt channel that INTA# is assigned to.

3Dh: Interrupt Pin

Read Only

Default: 01h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Interrupt Pin

b[7:0] ..........Interrupt Pin

DS-1S supports INTA# only. This register is hardwired to 01h.

3Eh: Minimum Grant

Read Only

Default: 05h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Minimum Grant

b[7:0] ..........Minimum Grant

This register indicates the length of the burst period required by DS-1S.

This register is hardwired to 05h.

February 3, 1999

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Contents Overview FeaturesPreliminary GM system level LogosSensaura February 3YMF744B-V 0.5mm pin pitch PIN ConfigurationYMF744B-R 0.4mm pin pitch AC’97 Interface 8-pin PIN DescriptionPCI Bus Interface 54-pin Miscellaneous 11-pin External Audio Interface 5-pinLegacy Device Interface 15-pin Reserve Pin 13-pin Power Supply 22-pinPC/PCI IRQ Block DiagramTarget Device Mode PCI Bus CommandMaster Device Mode Function Overview5C-5Fh PCI Configuration Register02-03h Device ID 04-05h Command00-01h Vendor ID 06-07h Status 09h Programming Interface 08h Revision ID0Ah Sub-class Code 0Bh Base Class Code 10-13h PCI Audio Memory Base Address 0Dh Latency Timer 0Eh Header Type B0................IO Read Only 18-1Bh Legacy Audio I/O Base Address Dummy for Joystick2E-2Fh Subsystem ID 2C-2Dh Subsystem Vendor IDB150 ........Subsystem Vendor ID B150 ........Subsystem ID3Ch Interrupt Line 34h Capability Register Pointer3Dh Interrupt Pin 3Eh Minimum Grant40-41h Legacy Audio Control 3Fh Maximum LatencyB5................I/O I/O Address Aliasing Control B4................MIEN MPU401 IRQ EnableB76 ..........SDMA Sound Blaster DMA-8 Channel Select B108 ........SBIRQ Sound Blaster IRQ Channel SelectB1211 ......SMOD SB DMA mode B14..............SIEN Serialized IRQ enable42-43h Extended Legacy Audio Control B8................MAIM MPU401 Acknowledge Interrupt Mask46-47h Subsystem ID Write Register 44-45h Subsystem Vendor ID Write RegisterCrst AC’97 Software Reset Signal Control Read / Write Default 0001h Access Bus Width 8, 16, 32-bitWrst AC’97 Warm Reset 48-49h DS-1S Control4A-4Bh DS-1S Power Control 4C-4Dh D-DMA Slave Configuration 4E-4Fh DS-1S Power Control B12 Psacl Power Save AC-LinkPsio Power Save I/O Pad B70 ..........Capability ID Capability Identifier 50h Capability ID51h Next Item Pointer 52-53h Power Management Capabilities54-55h Power Management Control / Status 5A-5Bh DS-1S Secondary AC’97 Power Control 58-59h Acpi Mode62-63h Sound Blaster Base Address 60-61h FM Synthesizer Base Address66-67h Joystick Base Address 64-65h MPU401 Base AddressB151 ........MPU401 Base Address B150 ........Joystick Base AddressISA Compatible Device DS-1S FM Synthesizer Status Register RO FM Synthesizer BlockStatus Register FM Synthesizer Data Register Array 1 R/W FM Synthesizer Data RegisterFM Synthesizer Data Register Array 0 R/W Sound Blaster Pro Block CMD DSP CommandSB Mixer DSP Sound Blaster Pro MixerSB Mixer AC’97 Volume for MidiSE Scan Enable B0................SBPDR Sound Blaster Power Down RequestSM Scan Mode Sbpda Sound Blaster Power Down AcknowledgementF2h Current FM Synthesizer Index F1h Scan In/ Out DataF3h Current FM Synthesizer Array F4h FM Synthesizer / MPU401 StatusFfemp FM Synthesizer Empty MPU401 F8h Interrupt Flag RegisterJoystick SB IRQ StatusPC/PCI DMA Emulation ProtocolDMA Serialized IRQ Interrupt RoutingHardware Volume Control Spdif Digital Audio InterfaceSclk Data Lrck Zoomed Video PortChannel Speaker System Multiple AC’97 & Multi-ChannelAC’97 Digital Docking Recommended Operating Conditions Electrical CharacteristicsAbsolute Maximum Ratings DC Characteristics Master Clock AC CharacteristicsReset PCI Clock timing PCI InterfaceMaster Clock timing for AC’97 AC’97 Master ClockAC-link timing AC-linkZoomed Video Port timing Zoomed Video PortUnit mm February 3 External DimensionsYMF744B-R Yamaha Corporation