Yamaha YMF724F 0Dh Latency Timer, 0Eh Header Type, 10 13h PCI Audio Memory Base Address

YMF724F

0Dh: Latency Timer

Read / Write

Default: 00h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Latency Timer

b[7:0] ..........Latency Timer

When DS-1 becomes a Bus Master device, this register indicates the initial value of the Master Latency

Timer.

0Eh: Header Type

Read Only

Default: 00h

Access Bus Width: 8, 16, 32-bit

b7

b6

b5

b4

b3

b2

b1

b0

Header Type

b[7:0] ..........Header Type

This register indicates the device type of DS-1. This is hardwired to 00h.

10 - 13h: PCI Audio Memory Base Address

Read / Write

Default: 00000000h

Access Bus Width: 8, 16, 32-bit

b15

b14

b13

b12

b11

b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

MBA

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

b31

b30

b29

b28

b27

b26

b25

b24

b23

b22

b21

b20

b19

b18

b17

b16

MBA (higher)

b[31:14] ......MBA: Memory Base Address

This register indicates the physical Memory Base address of the PCI Audio registers in DS-1. The base address can be located anywhere in the 32-bit address space. Data in the DS-1 register is not prefetchable.

DS-1 needs 32768-bytes of memory address space.

September 21, 1998

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