linux sbc recommendations

I realize this is nearly a dupe of SBC Recommendations , but I have slightly different specs in mind.

Does anyone know of a single-quantity SBC with the following features?

• 32 bit CPU, something common e.g., x86, ppc, arm, atom


• capable of running some fairly modern variant of Linux


• built-in 100Mbit/s ethernet interface (preferably with RJ-45 jack)


• built-in RS-232 or RS-232C serial port (DB-9 connector desirable but not critical)



• capable of booting an arbitrary OS/application from FLASH


• capable of booting an arbitrary OS/application from ethernet


• capable of booting over serial port desirable, not critical


• must have at least one USB 2.0 port. more::=better


• must operate from a single-voltage DC supply (not more than 28V, not more than 25W)


• prefer Not to have PS/2 keyboard & mouse interfaces


• prefer Not to have any graphics capability


• built-in SPI, I2C, or general-purpose discrete I/O bonus


• price point under $250

The mission for this SBC is to sit on my network and operate custom I/O hardware. Heaviest possible use case required would be to support a USB web-cam and serve low-bandwidth (CIF) video through a custom server app. Definitely not required to run databases, web servers, web browsers, middle-ware, ESB, or anything like that. Intended s/w platform C/C++, and maybe, just maybe, J2ME or J2SE.

The best match I've found so far is the BeagleBoard , but this falls short by having graphics capability (not needed) in place of ethernet capability (mandatory). I know you can add a USB based ethernet adapter, but ideally there would be a better match that would render this not necessary. There are also some atom-based 'car PCs' that are near misses, mainly for power supply reasons.

Answer

(Kind of a repeat from my answer to the previous question, but with a new board.) I'd go for the Technologic Systems TS-7553 for $135-- slightly cheaper than the Beagleboard, and just as good. I haven't actually used the 7553, but I've used its predecessors, the TS-7500 and TS-7550, and they're good. The only requirement it might not meet out of the box is booting over Ethernet, but I know it can be configured to do so (at least via TFTP or NFS).

(Maybe this goes without saying, but I have no connection to Technologic Systems at all. I've just used some of their boards.)