ICH4的spec中有个IDE_CONFIG—IDE I/O Configuration Register(IDE—D31:F1)0 D- z3 G: F; A) u( D' r
Bit10:WR_PingPong_EN — R/W. ( h/ X6 J% A' r/ k+ D: R9 q0 = Disabled. The buffer behaves similar to PIIX4.; ~# ~* o% m4 z4 j: E" X$ @. r
1 = Enables the write buffer to be used in a split (ping/pong) manner. ! ]+ \9 j* P( L) F: P1 E哪位给解释下是什么意思呀,这一位的功能是什么呀?