HP DC5100 HP Compaq Business Desktop dc5100 Service Reference Guide, 2nd Editi - Page 67
SATA BIOS, 4.6.1 Legacy Mode, 4.6.2 Native Mode
UPC - 072000919491
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Serial and Parallel ATA Drive Guidelines and Features 4.6 SATA BIOS Windows 2000 and XP Enhanced Mode (default BIOS Setting) -Separate IDE controller • PATA Controller in Legacy Mode - Device 0 is accessible as Device 0 of PATA controller's Primary Channel - Device 1 is accessible as Device 1of PATA controller's Primary Channel • SATA Controller in Native Mode - SATA 0 is accessible as Device 0 of SATA controller's Primary Channel - SATA 1 is accessible as Device 0 of SATA controller's Secondary Channel SATA 2 is accessible as Device 1of SATA controller's Primary Channel - SATA 3 is accessible as Device 1 of SATA controller's Secondary Channel Windows 9x, NT, and Linux Compatibility Mode (non-default BIOS Setting) -Combined IDE controller • PATA Controller in Legacy Mode - Device 0 is accessible as Device 0 of the combined controller's Secondary Channel - Device 1 is accessible as Device 1of the combined controller's Secondary Channel • SATA Controller in Legacy Mode - SATA 0 is accessible as Device 0 of the combined controller's Primary Channel - SATA 1 is inaccessible - SATA 2 is accessible as device 1 of the combined controller's Primary Channel - SATA 3 is inaccessible 4.6.1 Legacy Mode The Legacy mode is used to access devices attached to the embedded IDE controllers. Each channel requires two fixed I/O address ranges and an IRQ for each. ■ Primary Channel ❏ Command block: 1F0h - 1F7h ❏ Control block: 3F6h ❏ IRQ: 14 ■ Secondary Channel ❏ Command block: 170h - 177h ❏ Control block: 376h ❏ IRQ: 15 4.6.2 Native Mode The native mode is used to access devices attached to add-in cards and is not supported by many legacy operating systems. Addresses are assigned by PCI Plug-n-Play BIOS and the IRQ is shared with multiple controllers. Base Address Registers for the Command and Control Block are found in the PCI Configuration Space. ■ Offset 10h-Primary Command base address ■ Offset 14h-Primary Control base address ■ Offset 18h-Secondary Command base address ■ Offset 1Ch-Secondary Control base address Service Reference Guide, dc5100 376220-001 4-11