YMF754 Datasheet, PDF (32/60 Pages) YAMAHA CORPORATION – DS-1E

YMF754
DS-1E supports PC/PCI and D-DMA protocols to emulate the DMA of SB Pro on the PCI. In addition, DS-
1E supports the old type of interrupts used by ISA and the Serialized IRQ protocol.
The combination of PC/PCI and Serialized IRQ is recommended for DS-1E.
The system block diagram when using Intel chip set is shown below.
North
Brigde
(430TX/440BX)
DS-1E
PCREQ#
PCGNT#
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
SERIRQ#
PCI
Address/Data
Control
South
Bridge
(PIIX4E)
Select either protocols
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.
June 28, 1999
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