YMF744B ETC [List of Unclassifed Manufacturers], YMF744B Datasheet - Page 33

• Manufacturer Part Number: YMF744B
• Description: DS-1S
• Manufacturer: ETC [List of Unclassifed Manufacturers]

YMF744B
DS-1S supports PC/PCI and D-DMA protocols to emulate the DMA of SB Pro on the PCI. In addition, DS-
1S supports the old type of interrupts used by ISA and the Serialized IRQ protocol.
Yamaha recommends the combination of PC/PCI and Serialized IRQ.
The system block diagram when using Intel chip set is shown below.
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.
DS-1S
SERIRQ#
PCREQ#
PCGNT#
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
(430TX/440BX)
Brigde
North
-33-
Select either protocols
PCI
(PIIX4E)
Bridge
South
Address/Data
Control
February 3, 1999