YMF724F
FUNCTION OVERVIEW
1. PCI INTERFACE
DS-1 supports the PCI bus interface and complies to PCI revision 2.1.
1-1. PCI Bus Command
DS-1 supports the following PCI Bus commands.
1-1-1. Target Device Mode
C/BE[3:0]#
Command
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Interrupt Acknowledge (not support)
Special Cycle (not support)
I/O Read
I/O Write
reserved
reserved
Memory Read
Memory Write
reserved
reserved
Configuration Read
Configuration Write
Memory Read Multiple (not support)
Dual Address Cycle (not support)
Memory Read Line (not support)
Memory Write and Invalidate (not support)
DS-1 does not assert DEVSEL# when accessed with commands that are indicated as (not supported) or
reserved.
1-1-2. Master Device Mode
C/BE[3:0]#
Command
0
0
1
1
1
1
0
1
Memory Read
Memory Write
# #
When DS-1 becomes a Master Device, it generates only memory write and read cycle commands.
January 14, 1999
-9-
YAMAHA [ YAMAHA CORPORATION ]
