User`s manual

RouterBOARD Crossroads User's Manual
CPU. Crossroads series has MIPS32 little-endian based embedded processor using MIPS 4KEc CPU core. It is
fully binary-compatible with all software developed for MIPS32 little-endian (mipsel) instruction set
architecture. The MIPS 4KEc core includes TLB Memory Management Unit and does not include Float Point
Unit (so it is optimized for integer operations).
Ethernet. Crossroads has one onboard Ethernet ports controlled by Atheros AR2316 embedded Fast
Ethernet controller.
MikroTik RouterOS
MikroTik RouterOS, starting from version 2.9.38 (RouterBOARD 100/500 edition) Crossroads series
embedded boards.
RouterBOOT
The RouterBOOT firmware (also referred as “boot loader” here) provides minimal functionality to boot an
Operating System. It supports serial console via the onboard serial port at the boot time. The loader
supports booting from the onboard NAND device, CompactFlash or IBM Microdrive, and from a network
server (see the respective section for details on this protocol).
Supported OSs:
● MikroTik RouterOS starting with version 2.9.38
Boot Loader Configuration
Loader parameters may be configured through the onboard RS232C DB9 asynchronous serial interface. To
connect to it, use a standard null-modem cable. By default, the port is set to 115200bit/s, 8 data bits, 1
stop bit, no parity. Note that the device does not fully implement the hardware (RTS/CTS) flow control, so it
is suggested to try to disable hardware flow control in the terminal emulation program in case the serial
console does not work as expected, and if it does not help, make a new cable using the pinout given in the
Appendix.
To enter the loader configuration screen, press any key (or only [Delete] key (or [Backspace] key – see the
note for the respective configurable option), depending on the actual configuration) just after the loader is
asking for it:
RouterBOOT booter 1.5
RouterBoard Crossroads
CPU frequency: 184 MHz
Memory size: 32 MB
Press any key within 5 seconds to enter setup
RouterBOOT-1.5
What do you want to configure?
d - boot delay
k - boot key
s - serial console
o - boot device
u - cpu mode
r - reset configuration
g - upgrade firmware
i - board info
p - boot protocol
t - do memory testing
x - exit setup
your choice:
To select a menu point, press the key written at the beginning of this line. Pressing [Enter] selects the
option marked with '*'.
Configurable Options
boot delay – how much time to wait for a key stroke while booting (1..9 seconds; 2 second by default).
boot key – which key will cause the loader to enter configuration mode during boot delay (any key |
<Delete> key only; any key by default). Note that in some serial terminal programs, it is impossible to use
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