ata: Advertise multiword DMA support - #214
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Followup to dingusdev#192. That implemented DMA support, but did not advertise it via the IDENTIFY command. While the 10.0 public beta used it unconditionally, later releases will only use it if the hardware reports the MWDMA bit. Takes booting 10.3 (to WindowServer startup) from ~60 seconds to ~47 seconds on my machine.
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Followup to #192. That implemented DMA support, but did not advertise it via the IDENTIFY command. While the 10.0 public beta used it unconditionally, later releases will only use it if the hardware reports the MWDMA bit.
DMA is more efficient than PIO (less time spent in the CPU emulator); this takes booting 10.3 (to WindowServer startup) from ~60 seconds to ~47 seconds on my machine.