参数资料
型号: YMF724
厂商: Yamaha Corporation
英文描述: high performance audio controller for the PCI Bus
中文描述: 高性能音频控制器的PCI总线
文件页数: 13/50页
文件大小: 268K
代理商: YMF724
YMF724F
January 14, 1999
-20-
b[12:11] ......SMOD: SB DMA mode
These bits determine the protocol to achieve the DMAC(8237) function on the PCI bus.
“0”:
PC/PCI
(default)
“1”:
reserved
“2”:
Distributed DMA
“3”
reserved
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
DS-1 supports 3 types of interrupt protocols: PCI interrupt (INTA#), Legacy interrupt (IRQs) and
Serialized IRQ.
The interrupt protocol is selected with IMOD and SIEN as follows.
SIEN
IMOD
Interrupt protocol
0
Legacy interrupt (IRQs)
(default)
0
1
PCI interrupt (INTA#)
1
*
Serialized IRQ
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.
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YMF724F-V 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:high performance audio controller for the PCI Bus
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