Redboot Port 9000 access is confirmed:
$ telnet 192.168.21.249 9000 Trying 192.168.21.249... Connected to 192.168.21.249. Escape character is '^]'. RedBoot>
but the below log is from the serial port:
+Ethernet eth0: MAC address 00:18:39:a7:92:f2 IP: 192.168.21.249/255.255.254.0, Gateway: 192.168.20.254 Default server: 0.0.0.0 RedBoot(tm) bootstrap and debug environment [ROM] Non-certified release, version v2_0 - built 16:52:38, Nov 30 2006 Platform: PC (I386) Copyright (C) 2000, 2001, 2002, Red Hat, Inc. RAM: 0x00000000-0x000f0000, 0x000720b0-0x000a0000 available R3210 00:0012 11-01-2006 <press Ctrl+C to enter prompt mode> RedBoot> ^C RedBoot> ^C RedBoot> ^C RedBoot> fconfig ** Error: Illegal command: "fconfig" RedBoot> fis list ** Error: Illegal command: "fis" RedBoot> help assign mac assign Manage machine caches cache [ON | OFF] Display/switch console channel channel [<channel number>] Compute a 32bit checksum [POSIX algorithm] for a range of memory cksum -b <location> -l <length> Display (hex dump) a range of memory dump -b <location> [-l <length>] [-s] [-1|2|4] Execute code at a location go [-w <timeout>] [entry] Help about help? help [<topic>] Set/change IP addresses ip_address [-l <local_ip_address>] [-h <server_address>] Execute a Linux image linux [-w timeout] [-b <base address> [-l <image length>]] [-r <ramdisk addr> [-s <ramdisk length>]] [-c "kernel command line"] Load a file load [-r] [-v] [-h <host>] [-m <varies>] [-c <channel_number>] [-b <base_address>] <file_name> Compare two blocks of memory mcmp -s <location> -d <location> -l <length> [-1|-2|-4] Fill a block of memory with a pattern mfill -b <location> -l <length> -p <pattern> [-1|-2|-4] Network connectivity test ping [-v] [-n <count>] [-l <length>] [-t <timeout>] [-r <rate>] [-i <IP_addr>] -h <IP_addr> Reset the system reset upgrade upgrade Display RedBoot version information version Display (hex dump) a range of memory x -b <location> [-l <length>] [-s] [-1|2|4] flash program test flash program flash RedBoot> RedBoot> version RedBoot(tm) bootstrap and debug environment [ROM] Non-certified release, version v2_0 - built 16:52:38, Nov 30 2006 Platform: PC (I386) Copyright (C) 2000, 2001, 2002, Red Hat, Inc. RAM: 0x00000000-0x000f0000, 0x000720b0-0x000a0000 available R3210 00:0012 11-01-2006 <press Ctrl+C to enter prompt mode>
The FLASH command will brick your NAS200!
There is no fconfig and no fis command: they have been disabled.
Instead of the "fis" command, the NAS200 has a "flash" command. This command copies whatever is in memory locations 0x400000-0x41FFFF (128K) to the upper 128K of Flash memory to update Redboot. The flash command will overwrite your Redboot without warning and will brick your NAS200! You will have to use a JTAG connection and RDC Loader to make it work again.
It's virtually impossible to accidentally overwrite the Linux kernel and the rom disk part of the Flash ROM with Redboot commands, so even if you brick your box, chances are that your Linux installation is undamaged and will boot as soon as you can revive Redboot. If not, you will have to find a version of UGUTIL.EXE that allows you to use the redboot "upgrade" command. Unfortunately, although the UGUTIL.EXE program that's mentioned in the NSLU2 section of this website will recognize the NAS200 when it's running in upgrade mode, it won't be able to download an image file: it will say that the hardware is incompatible. However, depending on circumstances, it should be possible to build a modified RedBoot or a modified UGUTIL to perform the task.