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3 System Board (P/Ns D3657-63001 and D3661-63001)
Principal Components and Features
System Board Configuration Switches
The system board configuration switches are used to configure certain
aspects of the computer.
The system board switches used for configuring the PC are summarized in
the following table.
ISA bus controller
(for SB82371FB only)
❒ Fully compatible with ISA bus standard
❒ 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
(for SB82371FB only)
❒ Supports PIO and Bus Master IDE
❒ Supports up to Mode 4 timings
❒ Up to 22 MB/s transfer rate
❒ 8×32-bit buffer for Bus Master IDE PCI burst transfers
Function Features
OPEN
Example of system board
switch settings