YMF724F Datasheet, PDF (28/50 Pages) YAMAHA CORPORATION – high performance audio controller for the PCI Bus

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 chip set is shown below.
North
Brigde
(430TX/440BX)
DS-1
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.
January 14, 1999
-28-