YMF724F
1-2. PCI Configuration Register
In addition to the Configuration Register defined by PCI Revision 2.1, DS-1 provides proprietary PCI
Configuration Registers in order to control legacy audio function, such as FM Synthesizer, Sound Blaster Pro,
MPU401 and Joystick. These additional registers are configured by BIOS or the configuration software
from YAMAHA Corporation.
The following shows the overview of the PCI Configuration Register.
Offset
00-03h
04-07h
08-0Bh
0C-0Fh
10-13h
14-2Bh
2C-2Fh
30-33h
34-37h
38-3Bh
3C-3Fh
40-43h
44-47h
48-4Bh
4C-4Fh
50-53h
54-57h
58-5Bh
5C-FFh
b[31..24]
b[23..16]
b[15..8]
b[7..0]
Device ID
Status
Vendor ID
Command
Base Class Code
Reserved
Sub Class Code
Header Type
Programming IF
Latency Timer
Revision ID
Reserved
PCI Audio Memory Base Address
Reserved
Subsystem ID
Subsystem Vendor ID
Reserved
Reserved
Reserved
Cap Pointer
Maximum Latency
Minimum Grant
Interrupt Pin
Interrupt Line
Extended Legacy Audio Control
Subsystem ID Write
DS-1 Power Control
Reserved
Legacy Audio Control
Subsystem Vendor ID Write
DS-1 Control
D-DMA Slave Configuration
Power Management Capabilities
Reserved
Next Item Pointer
Capability ID
Power Management Control / Status
ACPI Mode
Reserved
Reserved
Reserved registers are hardwired to “0”. All data written to these registers are discarded. The values
read from these registers are all zero.
DS-1 can be accessed by using any bus width, 8-bit, 16-bit or 32-bit.
January 14, 1999
-10-
YAMAHA [ YAMAHA CORPORATION ]
