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参数资料
| 型号： | YMF740C |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | DS-1L |
| 中文描述： | 的DS - 1公升 |
| 文件页数： | 17/44页 |
| 文件大小： | 224K |
| 代理商： | YMF740C |
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YMF740C
January 14, 1999
-24-
2. ISA Compatible Device
DS-1L contains the following functions to maintain the compatibility with the past ISA Sound Devices.
These devices are considered Legacy devices and the functions are referred to as Legacy Audio.
Legacy Audio is independent from PCI Audio and can be used simultaneously.
The configuration is set in the Legacy Audio Control Register in the PCI Configuration Register space.
Basically, these registers are configured by the BIOS.
Also, logical device IDs are assigned to the devices to support Plug and Play.
Yamaha defines the following
logical IDs.
To control the device with the BIOS, the logical device IDs must be defined in the PnP BIOS extended ROM
space.
The logical IDs are determined by how it is configured.
IDs and configuration are as follows.
Functions used (Block)
Logical Device ID
FM
(*)
MPU401
SB Pro
(*)
Joystick
YMH0100
O
YMH0101
O
* The blocks pertain to the following.
FM:
Points to the FM synthesizer mapped to AdLibBase (0x0388).
SB Pro:
Points to the Voice Playback section only.
These devices are independent from each other, and can be Enabled/Disabled individually.
However, both
AdLib and Sound Blaster must be disabled to disable the internal FM Synthesizer.
Disabling just AdLib
only masks the access.
The driver by Yamaha supports only logical device ID, YMH0100.
For YMH0101, use the driver provided
by Microsoft.
DS-1L supports PC/PCI protocol to emulate the DMA of SB Pro on the PCI.
In addition, DS-1L supports
the old type of interrupts used by ISA.
The PCI-to-ISA bridge needs to support PC/PCI.
IRQ is directly connected to the IRQ input pins on the
PCI-to-ISA bridge.
相关PDF资料 |
PDF描述 |
|---|---|
| YMF743-S | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| YMF743 | AC97 Revsion2.1 Audio CODEC with Digital Audio I/F(AC97 2.1版音频编解码器（带数字音频接口）) |
| YMF744B | DS-1S |
| YMF752 | AC97 Rev2.1 Audio CODEC with SRC |
| YMF752-S | AC97 Rev2.1 Audio CODEC with SRC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| YMF740CV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| YMF743 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:AC’97 Revsion2.1 Audio CODEC with Digital Audio I/F |
| YMF743-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Consumer IC |
| YMF744B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DS-1S |
| YMF744BR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
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