HP 525 5/XX, 520 5/XX manual System Board Configuration Switches

3 System Board (P/Ns D3657-63001 and D3661-63001)

Principal Components and Features

Function	Features
ISA bus controller	❒ Fully compatible with ISA bus standard
(for SB82371FB only)	❒ Supports asynchronous ISA bus operation up to 16 MHz
	❒ Integrates:
	❒ two 82C37A DMA controllers
	❒ two 82C59A interrupt controllers
	❒ 82C54 timer
	❒ hidden ISA refresh controller
	❒ support for BIOS
	❒ port A, B and NMI logic
Fast IDE controller	❒ Supports PIO and Bus Master IDE
(for SB82371FB only)	❒ Supports up to Mode 4 timings
	❒ Up to 22 MB/s transfer rate
	❒ 8×32-bit buffer for Bus Master IDE PCI burst transfers

System Board Configuration Switches

The system board configuration switches are used to configure certain aspects of the computer.

Example of system board switch settings

The system board switches used for configuring the PC are summarized in the following table.

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