YMF744B

b6

PER: Parity Error Response

This bit enables DS-1S responses to Parity Error. “0”: DS-1S ignores all parity errors.

“1”: DS-1S performs error operation when DS-1S detects a parity error.

b8................SER: SERR# Enable

 

This bit enables DS-1S to drive SERR#.

“0”: Do not drive SERR#.

(default)

“1”: Drives SERR# when DS-1S detects an Address Parity Error on normal target cycle or a Data Parity

Error on special cycle.

 

06-07h: Status

Read / Write Clear

Default: 0210h

Access Bus Width: 8, 16, 32-bit

 

b15

b14

b13

b12

b11

b10

b9

b8

 

b7

b6

b5

b4

b3

b2

b1

b0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DPE

SSE

RMA

RTA

STA

DEVT

DPD

 

-

-

-

CAP

-

-

-

-

b4................CAP: Capability

 

(Read Only)

 

 

 

 

 

 

 

 

This bit indicates that DS-1S supports the capability register. This bit is read only. When 58-59h : ACPI Mode register, ACPI bit is “0”, the bit is “1”. When ACPI bit is “1”, the bit is “0”.

b8

DPD: Data Parity Error Detected

This bit indicates that DS-1S detects a Data Parity Error during a PCI master cycle.

b[10:9] ........DEVT: DEVSEL Timing

This bit indicates that the decoding speed of DS-1S is Medium.

b11

STA: Signaled Target Abort

This bit indicates that DS-1S terminates a transaction with Target Abort during a target cycle.

b12

RTA: Received Target Abort

This bit indicates that a transaction is terminated with Target Abort while DS-1S is in the master memory cycle.

b13

RMA: Received Master Abort

This bit indicates that a transaction is terminated with Master Abort while DS-1S is in the master memory cycle.

b14

SSE: Signaled System Error

This bit indicates that DS-1S asserts SERR#.

b15

DPE: Detected Parity Error

This bit indicates that DS-1S detects Address Parity Error or Data Parity Error during a transaction.

February 3, 1999

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Yamaha YMF744B (DS-1S) specifications 06-07h Status

YMF744B (DS-1S) specifications

The Yamaha YMF744B, also known as the DS-1S, is a popular audio chip that emerged in the late 1990s, particularly known for its use in sound cards for PCs. This sound processor exemplifies Yamaha's commitment to delivering high-quality audio through innovative technology and user-friendly features.

One of the standout features of the YMF744B is its ability to support advanced sound synthesis methods, including wave table synthesis and sample playback. These technologies provide users with a rich audio experience, enabling high-fidelity sounds reminiscent of live instruments. The chip is also notable for its ability to emulate MIDI instruments, allowing musicians to create synthesized music that captures the nuances of traditional sounds.

The YMF744B integrates a 16-bit DAC (Digital-to-Analog Converter), which facilitates high-quality audio playback with a sampling rate of up to 48 kHz. This capability ensures that sound reproduction remains clear and devoid of distortion, appealing to both casual users and audio professionals alike. Additionally, the chip supports multiple audio channels, making it ideal for gaming and multimedia applications where spatial audio is crucial.

Another significant feature of the YMF744B is its support for various audio formats, including PCM (Pulse Code Modulation), ADPCM (Adaptive Differential Pulse Code Modulation), and even MIDI. The versatility in format support allows users to interact with a broad spectrum of audio applications, from game design to music production.

The chip also comes with integrated Sound Blaster Pro compatibility, which significantly enhances its usability with a vast array of software and games designed during the 1990s and early 2000s. This compatibility is crucial for retro gaming enthusiasts who seek an authentic audio experience with classics from the past.

Moreover, the YMF744B champions power efficiency, making it an attractive choice for mobile computing platforms. Its low power consumption means that it can be effectively used in laptops without significantly draining battery life, allowing users to enjoy high-quality sound on the go.

In summary, the Yamaha YMF744B (DS-1S) stands out due to its advanced audio synthesis capabilities, high-quality playback features, and compatibility with multiple formats. These attributes make it a favored choice in the audio processing domain, continuing to impact computer audio technology long after its initial release.