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HU430 NLX Motherboard User Guide
1 Overview
The HU430 motherboard is an NLX form factor socket 7 design, with a local bus speed of 60
or 66MHz. The design is based around the Intel 430TX chipset. The board was designed to be
compliant with the NLX specification 1.2 and must be used with an NLX riser that also
conforms to this specification.
1.1 Motherboard Features
Form factor
Processors
Power regulation
Core logic
Cache
Memory – RAM
Memory - Flash ROM
Buses
VGA
Audio – controller
Audio – features
Audio – output
Hard Disk & CD-ROM Dual ATA33 (UltraDMA/33)
Floppy Disk
Parallel Port
Serial Ports
USB
Keyboard & Mouse
Security
IR I/O
Power Management
Cooling
System Management
Plug & Play
Battery back-up
PCB
Mitsubishi Electric PC Division
NLX, 9.0" wide x 10.0" long
Socket 7 - P54C, P55C, K6, 60/66MHz bus speed
Adjustable processor core voltage regulator 2.1V to 3.6V, optional
3V3 regulator for 4 o/p PSUs
Intel 430TX with PIIX4E ISA bridge
256KB or 512KB on-board L2
2 DIMMs for 64-bit unbuffered SDRAM (or EDO)
2Mb: BIOS/Setup, USB, DMI, 120FD
3 bus master PCI slots and ISA
ATI VT3 (VT-B) part standard, 3D-RAGE II+ compatible, 1MB
40ns EDO upgradeable to 2MB
Business audio only, Crystal CS4236B
MIDI/joystick header
Mono internal speaker, 'PHONES OUT, MIC IN jacks on
motherboard rear panel
Standard 3.5", 5.25" & tape drives. Support for 120MB via IDE
IEEE 1284 (ECP & standard)
2x 16550s: 9-way 'D' COM1, COM2
Dual USB connector; optionally one channel can be routed to the
NLX riser
Dual-stacked PS/2 style keyboard/mouse connectors
BIOS branding
IR routed to NLX riser, but not IRDA control signals
Uses SMM. IRQ wake-up. Magic Packet & PCI PME# supported
NLX fan signal and CPU fan switched by GPIO port in standby,
CPU fansink connector on motheboard
DMI instrumentation chip LM78 as optional fit
PC97 compliant
On-board lithium coin cell with 5 years life
9.0" wide by 10.0" long, all top-side components
124575UG Revision 2
Page 3 of 21
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