Yamaha YMF724F specifications Pci

YMF724F

DS-1 supports PC/PCI and D-DMA protocols to emulate the DMA of SB Pro on the PCI. In addition, DS-1 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 430TX chip set is shown below.

North

Brigde (430TX)

		PCI
				Address/Data
				Control
	PCREQ#
	PCGNT#
	IRQ5		South
DS-1	IRQ7		Bridge
	IRQ9
			(PIIX4)
	IRQ10
	IRQ11
	SERIRQ#
		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.

September 21, 1998

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