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This article Based on work by Patrick Arnoux.,Johannes Kaiser, nix, noName, frontalot, non, marge, admin and kuroguy. Originally by admin. at


SoC with CPU 400MHz IDT 79RC32434-400BC with MIPSel 4Kc CPU core
RAM 64MB Micron MT 46V32M16-5BC SDRAM
Flash ROM 4MB Macronix MX29LV320T.
USB NEC µPD720101GJ USB2.0 Host Controller. Two of five ports connected with type-A connectors (rear: /dev/usb/lp0, front: /dev/usb/lp1)
NIC Part of the SoC. Connected via MII to separate physical receiver (PHYceiver) Realtek RTL8201CP Single-Port 10/100M Fast Ethernet PHYceiver
IDE Controller IT8211 PCI IDE disk controller.
Stock Firmware 2.x
Microcontroller MC68HC908JL8
Microcontroller Analysis mipsel-hdhlan Microcontroller Analysis and Kuroguy's analysis of the pin functions
Benchmarks mipsel-hdhlan Benchmarks
Bootloader mipsel-hdhlan Boot Loader Overview
Flash ROM mipsel-hdhlan Flash ROM Analysis
Hardware mipsel-hdhlan Overview
Fan 40mm x 10mm 12V, ADDA part #AD0412LX-G76
Kernel mipsel-hdhlan Kernel
LED mipsel-hdhlan LED Analysis
Software mipsel-hdhlan Filesystem contents
Serial Access Add_a_Serial_port_to_the_MIPS_Linkstation

Take a look here for some detailed hacking information : Hardware Hacks for the LS2

Main Board

Serial Console
Adding a serial interface is difficult as the only serial port is connected to the housekeeping microcontroller. See Add a Serial port to the MIPS Linkstation for details.

The following hardware can be found on the main board :

  • IDT 79RC32434-400BC Integrated Communications Processor, containing
    • 32-bit @ 400MHz MIPSel CPU core (el -> le -> little endian) with MIPS32 instructions set architecture. Based on the MIPS 4Kc core.
    • 10/100Mb Ethernet channel {:MII:Media Independent Interface}/{:RMII:Reduced Media Independent Interface} interface controller
    • Serial UART, 16550 compatible
    • DDR memory controller, can handle up to 256MB
    • general purpose memory controller
    • PCI controller
    • DMA controller
    • I2C bus
    • general purpose I/O connectors
    • JTAG interface (hardware-supported debugging)
    • Watchdog timer
    • No FPU (floating point is done via software emulation)
  • 8201CP 'PHYceiver' - Physical Ethernet tranceiver, connected to the ICP's Ethernet channel
  • RAM - 64MB Micron MT 46V32MI6-SBC SDRAM
  • Flash ROM - 4MB Macronix MX29LV320T.
  • IT8211 PCI IDE disk controller. The stock kernel driver reports an IT8212 (an IDE RAID 0/1/0+1 controller). However, there is indeed only a IT8211 on the board.
  • USB - 2 type A connectors (rear - /dev/usb/lp0, front - /dev/usb/lp1) - NEC D720101GJ. The NEC chip supports five USB interfaces, of which only two are connected to the two plugs. Experienced tinkerer can try to add more USB plugs, according to this here.


IDE 3.5" Disk

  • LS120: Samsung SP1203N / Western Digital WDC WD1200BB-00GUC0
  • LS160: Western Digital WD1600
  • LS250: Samsung SP2514N or V120CE(HA250JC) / Western Digital WD2500BB-22GUC0
  • LS300: Western Digital WD3200JB-00KFA0

Power Supply

  • 25W Univive Co., Ltd. "open frame" dual voltage power supply, from the UOP25D/325D series ([1], [2]). The power supply is actually a "brick" power supply without the usual plastic case. The UOP25D/325D series comes in different variations. The differences are the input voltage ranges, and the maximum output current and output voltage stability. 5V ±5%, 0.1A - 2A and 12V ±6%, 0.1A - 1.5A are typical output values.