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Mitsubishi Electric Hurricane HU430 User Manual

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User Guide
HU430 (Hurricane) NLX Motherboard
124575UG Revision 2
13-3-98
This document is the exclusive property of Mitsubishi Electric PC Division. It shall not be copied nor it's contents
communicated or reproduced in any form and for any purpose without specific authority in writing from Mitsubishi
Electric PC Division.

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   Summary of Contents for Mitsubishi Electric Hurricane HU430

  • Page 1 124575UG Revision 2 13-3-98 This document is the exclusive property of Mitsubishi Electric PC Division. It shall not be copied nor it's contents communicated or reproduced in any form and for any purpose without specific authority in writing from Mitsubishi...
  • Page 2: Table Of Contents

    HU430 NLX Motherboard User Guide 124575UG Revision 2 Contents OVERVIEW ...........................3 1.1 M ......................3 OTHERBOARD EATURES 1.2 C ......................4 ONFIGURATION PTIONS 1.2.1 Build-time..........................4 1.2.2 User Configurable.......................4 1.3 B .........................5 LOCK IAGRAM ELECTRONICS..........................6 2.1 P ..........................6 ROCESSOR 2.2 C ..........................6 OGIC 2.3 L...
  • Page 3: Overview

    124575UG Revision 2 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...
  • Page 4: Configuration Options

    HU430 NLX Motherboard User Guide 124575UG Revision 2 1.2 Configuration Options 1.2.1 Build-t L2 cache can be 256KB or 512KB (using 32Kx32 or 64Kx32 parts) L2 cache can be PBSRAM or MDRAM technology Flash BIOS ROM can be 2Mb or 4Mb TSOP40...
  • Page 5: Block Diagram

    1.3 Block Diagram C A C H E 0 , 1 T A G C P U S Y S T E M C L O C K S I C S 9 1 4 7 - 0 3 6 4 K X 3 2 S R A M 3 2 K X 8 I C 4 S O C K E T 7...
  • Page 6: Electronics

    2 Electronics 2.1 Processor Processor support is for a dual voltage-plane socket 7, for the P54C, P55C and K6. Processor bus speeds allowed are 60 or 66MHz, and all core multipliers can be set from the main jumper block PL10. Depending on the processor fitted, the processor bus speed, core multiplier, and core voltage will have to be correctly set.
  • Page 7: Level 2 Cache

    It supports standard PBSRAM (15ns cycle time, 8ns clock to output) or DRAM-based cache HU430 supports a 256KB cache size (with 2 pcs of 32K x 32) or a 512KB cache size (with 2 pcs of 64K x 32). Optional fit resistors set the appropriate register configuration bits in the MTXC at power-on.
  • Page 8: Audio

    HU430 NLX Motherboard User Guide 124575UG Revision 2 The video memory comprises 4 pieces of 256Kx16 40-pin SOJ to give a maximum of 2MB (64-bits wide). Board builds populated with only 1MB (2 pieces) will have two sockets fitted to enable the memory to be upgraded to 2MB. The memory type is 40ns EDO DRAM.
  • Page 9: Hu430 Nlx Motherboard User Guide 124575ug Revision

    HU430 NLX Motherboard User Guide 124575UG Revision 2 scheme compatible with that of the PIIX4. This allows a wide selection of interrupt channels for the serial and parallel ports, and the floppy disk controller. 2.7.1 Keyboard and Mouse This is implemented in an SMC 37C675 device on the motherboard. The keyboard and mouse controller uses the Phoenix Multikey version 1.40 firmware.
  • Page 10: Universal Serial Bus (usb)

    HU430 NLX Motherboard User Guide 124575UG Revision 2 2.8.2 Universal Serial Bus (USB) The controller is integrated into the PIIX4E. Two channels are wired to a dual-stacked USB connector provided on the rear panel. Optionally, the motherboard may have a single USB connector on the rear panel with one channel routed to the NLX riser.
  • Page 11: Power Management

    (s/w) or green throttling 2.10.2 Power-on Control On HU430 a GPO port is used to control the state after an AC reconnect, regardless of how the machine was powered off: GPO27 Action machine powers-up in SOFT-OFF and waits for a power button press...
  • Page 12: Peripheral Component Interconnect (pci)

    HU430 NLX Motherboard User Guide 124575UG Revision 2 The PIIX4E can support up to 5 ISA slots on the riser. There are an additional two ISA ‘loads’ used on the motherboard: the audio and super i/o controllers. 2.11.2 Peripheral Component Interconnect (PCI) The motherboard can support up to 3 bus master PCI slots on the NLX riser.
  • Page 13: Pci Interrupts

    HU430 NLX Motherboard User Guide 124575UG Revision 2 2.12.3 PCI Interrupts Channel Device INTA# Slots INTB# Slots INTC# Slots INTD# Video & slots 2.12.4 PCI Device Selection Dev No IDSEL Device Function No Function AD(11) MTXC AD(15) AD(18) PIIX4E PCI-ISA bridge “...
  • Page 14: Thermal

    HU430 NLX Motherboard User Guide 124575UG Revision 2 motherboards. The 'width' dimension is the edge adjacent to the system rear panel which contains the I/O connectors: Length Width Comments Standard LPX 13.0” 9.0” Spitfire 7.6” 9.0” Small LPX HU430 10.0"...
  • Page 15: Appendix A. Jumpers And Switches

    HU430 NLX Motherboard User Guide 124575UG Revision 2 Appendix A. Jumpers And Switches Main Jumper Block, PL10 BF1 and BF0 set the processor bus/core multiplier ratio on P54C and P55C processors, and BF2 is present to support the K6. The FS jumper selects a processor bus speed of 60 or 66 MHz.
  • Page 16 HU430 NLX Motherboard User Guide 124575UG Revision 2 FS (IN=60MHz, OUT=66MHz) VGA (IN=enable) V G A AUDIO (IN=enable) AUDIO P W 2 P W 2 P W 1 P W 1 P W 0 P W 0 P W 3...
  • Page 17: Appendix B. Connector Assignments

    HU430 NLX Motherboard User Guide 124575UG Revision 2 Appendix B. Connector Assignments NLX Riser Edge Connector NLX Supplemental Edge Connector USB, PL15 Port 0 Port 1 DATA- DATA+ The +5V supply to both connectors is fused with a single 1.1A resettable fuse.
  • Page 18 HU430 NLX Motherboard User Guide 124575UG Revision 2 SAD3 RESET# SAD7 SAD6 SAD5 RES/SDA Analogue gnd +12V AUDRIGHT AUDLEFT VGA, PL3 BLUE GREEN B RTN G RTN R RTN VSYNC HSYNC The +5V supply is fused with a 1.1A resettable fuse.
  • Page 19 HU430 NLX Motherboard User Guide 124575UG Revision 2 STROBE# ALF# ERROR# INIT# SLCTIN# Ground Ground Ground Ground Ground ACK# Ground BUSY Ground Ground SLCT COM1, PL3 And COM2, PL7 Input Data Carrier Detect Input Receive Data Output Transmit Data Output...
  • Page 20 HU430 NLX Motherboard User Guide 124575UG Revision 2 J/stick A fire 1 J/stick B fire 1 J/stick A x-ctrl J/stick B x-ctrl MIDI out J/stick B y-ctrl J/stick A y-ctrl J/stick B fire 2 J/stick A fire 2 MIDI in...
  • Page 21 HU430 NLX Motherboard User Guide 124575UG Revision 2 To cause a reset event to occur, pin 1 must be shorted to ground. Input Ground Mitsubishi Electric PC Division Page 21 of 21...

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