Yamaha YMF744B (DS-1S) specifications 44-45h Subsystem Vendor ID Write Register

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YMF744B

b[14:13] ......SBVER: SB Version Select

These bits set the version of the SB Pro DSP. The value set in these bits is returned by sending the E1h

DSP command.
“0”:	ver 3.01	(default)
“1”:	ver 2.01
“2”:	ver 1.05
“3”:	reserved

b15..............IMOD: Legacy IRQ mode

The legacy interrupt protocol is selected with IMOD and SIEN. Refer to the explanation of SIEN bit.

44-45h: Subsystem Vendor ID Write Register

Read / Write

Default: 1073h

Access Bus Width: 16-bit

b15

b14

b13

b12

b11

b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

Subsystem Vendor ID Write

b[15:0] ........Subsystem Vendor ID Write Register

This register sets the Subsystem Vendor ID that is read from 2C-2Dh (Subsystem Vendor ID register). The default value is the YAMAHA Vendor ID, 1073h. IHVs must change this ID to their Vendor ID in the BIOS POST routine.

In case EEPROM connects externally, this register is invalid, and do not reflect to Subsystem Vendor ID.

46-47h: Subsystem ID Write Register

Read / Write

Default: 0010h

Access Bus Width: 16-bit

b15

b14

b13

b12

b11

b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

Subsystem ID Write

b[15:0] ........Subsystem ID Write Register

This register sets the Subsystem ID that is read from 2E-2Fh (Subsystem ID register).

The default value is the DS-1S Device ID, 0010h. IHVs must change this ID to their ID in the BIOS POST routine.

In case EEPROM connects externally, this register is invalid, and do not reflect to Subsystem ID.

February 3, 1999

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Contents Features PreliminaryOverview GM system level LogosSensaura February 3YMF744B-V 0.5mm pin pitch PIN ConfigurationYMF744B-R 0.4mm pin pitch PIN Description PCI Bus Interface 54-pinAC’97 Interface 8-pin External Audio Interface 5-pin Legacy Device Interface 15-pinMiscellaneous 11-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 Register04-05h Command 00-01h Vendor ID02-03h Device ID 06-07h Status 09h Programming Interface 08h Revision ID0Ah Sub-class Code 0Bh Base Class Code0Dh Latency Timer 0Eh Header Type10-13h PCI Audio Memory Base Address 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 Grant 40-41h 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 Psacl Power Save AC-Link Psio Power Save I/O PadB12 B70 ..........Capability ID Capability Identifier 50h Capability ID52-53h Power Management Capabilities 54-55h Power Management Control / Status51h Next Item Pointer 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 Block Status RegisterFM Synthesizer Status Register RO FM Synthesizer Data Register FM Synthesizer Data Register Array 0 R/WFM Synthesizer Data Register Array 1 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 PortMultiple AC’97 & Multi-Channel AC’97 Digital DockingChannel Speaker System Electrical Characteristics Absolute Maximum RatingsRecommended Operating Conditions DC Characteristics AC Characteristics ResetMaster Clock 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