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ErgoPro m664 PC Specialist's Handbook
Page 6-2 Edition 1 - Release 1 - March 1998
System board
Form factor
The system board is based on the ATX form factor, following the ATX specification. Outer dimensions are 12” x
7.75”.
Processor
The system board provides the Slot 1 connector for one Pentium II processor. The Pentium II processor is
provided in the SEC cartridge together with the 512kB L2 cache. The active heatsink is attached to the SECC
with two clips (i.e. heatsink with fan).
Voltage Regulator
The system board has an on-board switched-mode voltage converter for the CPU core voltage, which is
automatically set to the required value by the CPU itself. Fixed voltages are provided for the GTL bus and clock
synthesizer.
Core logic
The system board is based on the Intel’s 440LX AGPset (chip set), which consists the following two chips:
· 82443LX, north bridge with AGP interface
· 82371AB (PIIX4), south bridge with ACPI, USB, IDE and SMBus controllers
The 440LX has the following main features:
· Optimized for the Pentium® II processor
· Quad Port Acceleration
· SDRAM support
· Advanced Configuration and Power Interface support (ACPI)
· Ultra DMA/33 support
Super I/O
The system board has NS’s PC97307 Super I/O controller (PnP ISA compatible). The Super I/O has the
following main features:
· Floppy controller
· Keyboard controller
· One Parallel port
· Two Serial ports
Floppy disk controller
The floppy disk controller is integrated into the NS’s PC97307 Super I/O controller and is DP8473 and N82077
software compatible. It can handle the following floppy drive types: 360 kB, 1.2 MB (both 3.5” and 5.25”, 3.5”
requires driver), 720 kB, 1.44 MB and 2.88 MB.
Keyboard (Mouse) controller
The PS/2-type keyboard (and PS/2-type mouse) controller in integrated into the NS’s PC97307 Super I/O
controller and is 8042A software compatible.
Parallel port communication
There is one multi-mode parallel port using a standard 25-pin female D-type connector. The parallel port mode
can be set through the Resident Set-up Utility. The following modes are supported:
Compatible Standard mode
Bidirectional PS/2 compatible bi-directional parallel port
Enhanced mode (EPP): Enhanced Parallel Port (EPP 1.9), and is IEEE1284 compliant.
High speed mode (ECP): Microsoft and Hewlett Packard Extended Capabilities Port, and is IEEE1284
compliant.