YMF724 ETC, YMF724 Datasheet - Page 10

• Manufacturer Part Number: YMF724
• Description: high performance audio controller for the PCI Bus
• Manufacturer: ETC

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.
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.
0C-0Fh
2C-2Fh
3C-3Fh
4C-4Fh
5C-FFh
08-0Bh
14-2Bh
38-3Bh
48-4Bh
58-5Bh
00-03h
04-07h
10-13h
30-33h
34-37h
40-43h
44-47h
50-53h
54-57h
Offset
Maximum Latency
Base Class Code
Power Management Capabilities
Reserved
Extended Legacy Audio Control
b[31..24]
Subsystem ID Write
DS-1 Power Control
Subsystem ID
Device ID
Reserved
Reserved
Reserved
Status
Sub Class Code
Minimum Grant
Header Type
PCI Audio Memory Base Address
Reserved
b[23..16]
-10-
Reserved
Reserved
Reserved
Reserved
Next Item Pointer
Programming IF
Latency Timer
Power Management Control / Status
Interrupt Pin
b[15..8]
Subsystem Vendor ID Write
D-DMA Slave Configuration
Subsystem Vendor ID
Legacy Audio Control
DS-1 Control
ACPI Mode
Command
Vendor ID
Interrupt Line
Capability ID
Cap Pointer
Revision ID
Reserved
b[7..0]
January 14, 1999