Yamaha YMF744B (DS-1S) specifications Sound Blaster Pro Mixer, SB Mixer DSP

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YMF744B

2-2-2. Sound Blaster Pro Mixer

The following shows the register map of the Mixer section of Sound Blaster Pro.

Address

b7

b6

b5

b4

b3

b2

b1

b0

Remark

00h

Reset

04h

Voice Volume L

"1"

Voice Volume R

"1"

0Ah

-

-

-

"1"

-

MIC Volume*

0Ch

-

-

Ifilter*

"1"

Input Source*

"1"

0Eh

-

-

Ofilter*

"1"

-

-

St. SW

"1"

SB Pro Mixer

22h

Master Volume L

"1"

Master Volume R

"1"

26h

MIDI Volume L

"1"

MIDI Volume R

"1"

28h

CD Volume L*

"1"

CD Volume R*

"1"

2Eh

Line Volume L*

"1"

Line Volume R*

"1"

F0h

SBPDA

-

-

-

SS

SM

SE

SBPDR

Suspend / Resume

F1h

SCAN

DATA

F8h

-

-

-

-

-

-

-

SBI

IRQ Status

The registers marked with * exist, but do not function.

DS-1S does not have the circuit that corresponds to the SB Mixer. Therefore, the volume settings on the SB Mixer are converted to the DSP coefficients of DS-1S or to AC’97 register values.

The conversion for each case is described below.

(1) SB Mixer ® DSP

The volume of master, MIDI and Voice, are applied to this case.

When the SB register is set, a 14-bit coefficient value is determined from the following conversion table and used as the DSP coefficient. The attenuation value of Master Volume, MIDI, and voice are summed together to obtain the coefficient.

These volumes cannot be controlled from PCI Audio block.

February 3, 1999

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Contents Overview FeaturesPreliminary Sensaura LogosGM system level February 3PIN Configuration YMF744B-V 0.5mm pin pitchYMF744B-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 Power Supply 22-pin Reserve Pin 13-pinBlock Diagram PC/PCI IRQMaster Device Mode PCI Bus CommandTarget Device Mode Function OverviewPCI Configuration Register 5C-5Fh02-03h Device ID 04-05h Command00-01h Vendor ID 06-07h Status 0Ah Sub-class Code 08h Revision ID09h Programming Interface 0Bh Base Class Code10-13h PCI Audio Memory Base Address 0Dh Latency Timer0Eh Header Type 18-1Bh Legacy Audio I/O Base Address Dummy for Joystick B0................IO Read OnlyB150 ........Subsystem Vendor ID 2C-2Dh Subsystem Vendor ID2E-2Fh Subsystem ID B150 ........Subsystem ID3Dh Interrupt Pin 34h Capability Register Pointer3Ch Interrupt Line 3Eh Minimum Grant3Fh Maximum Latency 40-41h Legacy Audio ControlB76 ..........SDMA Sound Blaster DMA-8 Channel Select B4................MIEN MPU401 IRQ EnableB5................I/O I/O Address Aliasing Control B108 ........SBIRQ Sound Blaster IRQ Channel Select42-43h Extended Legacy Audio Control B14..............SIEN Serialized IRQ enableB1211 ......SMOD SB DMA mode B8................MAIM MPU401 Acknowledge Interrupt Mask44-45h Subsystem Vendor ID Write Register 46-47h Subsystem ID Write RegisterWrst AC’97 Warm Reset Read / Write Default 0001h Access Bus Width 8, 16, 32-bitCrst AC’97 Software Reset Signal Control 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 50h Capability ID B70 ..........Capability ID Capability Identifier51h Next Item Pointer 52-53h Power Management Capabilities54-55h Power Management Control / Status 58-59h Acpi Mode 5A-5Bh DS-1S Secondary AC’97 Power Control60-61h FM Synthesizer Base Address 62-63h Sound Blaster Base AddressB151 ........MPU401 Base Address 64-65h MPU401 Base Address66-67h Joystick 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 Register FM Synthesizer Data Register Array 0 R/W Sound Blaster Pro Block DSP Command CMDSound Blaster Pro Mixer SB Mixer DSPVolume for Midi SB Mixer AC’97SM Scan Mode B0................SBPDR Sound Blaster Power Down RequestSE Scan Enable Sbpda Sound Blaster Power Down AcknowledgementF3h Current FM Synthesizer Array F1h Scan In/ Out DataF2h Current FM Synthesizer Index F4h FM Synthesizer / MPU401 StatusFfemp FM Synthesizer Empty Joystick F8h Interrupt Flag RegisterMPU401 SB IRQ StatusDMA Emulation Protocol PC/PCIDMA Interrupt Routing Serialized IRQHardware Volume Control Digital Audio Interface SpdifZoomed Video Port Sclk Data LrckChannel Speaker System Multiple AC’97 & Multi-ChannelAC’97 Digital Docking Recommended Operating Conditions Electrical CharacteristicsAbsolute Maximum Ratings DC Characteristics Master Clock AC CharacteristicsReset PCI Interface PCI Clock timingAC’97 Master Clock Master Clock timing for AC’97AC-link AC-link timingZoomed Video Port Zoomed Video Port timingExternal Dimensions Unit mm February 3YMF744B-R Yamaha Corporation