Linksys WRT55AG v1.0

The wireless module for 802.11a in the FCC photos is assumedly the Linksys WL-550. Pictures here depict the device with a different AR5211 based card.

Specs
Platform Serial Num. = ? FCC ID = PKW-WRT55AG Industry Canada ID = none specified CPU Type = Broadcom BCM4702 MIPS Rev = ? CPU Speed = ? Bus = ? Flash Type = ? Flash Chip = Intel E28F320J3A-110 Flash Size = 4 MB Max Firmware Size = ? RAM Size = 32 MB RAM Chip = Dynachips D98SD12816AH-6 x 2 nvram Size = 32 kb ETH chip1 = Broadcom BCM4702 ETH chip2 = Altima AC101L Switch = Broadcom BCM5325A2 Port-based vlan = ? 802.1q vlan = ? Ethernet Port Count = 1-10/100-WAN 4-10/100-LAN Wired Standard = IEEE 802.3/3u Ethernet interface OUI = none specified boot_wait = ? bootloader = ? Flash Card Socket/Type = No SD/MMC Mod Support = No Expansion IF types = 2x Mini PCI PoE = No Power = 5 VDC, 2.5 A Connector type/size = Barrel plug LEDs/Color = ? Size = ? USB = No Serial Port = ? JTAG Port = ? Supported by TJTAG/Version = ? Special Features = ? Radio WI1 module = Gemtek WL-550 (Linksys) WI1 module IF = Mini PCI Wireless Radio = Atheros AR5110 WLAN DSP processor = Atheros AR5210 Wireless interface OUI = none specified Antenna Connector Type = U.FL MIMO status = ? Wireless Standard = IEEE 802.11a 802.11a = 6, 9, 12, 18, 24, 36, 48, 54Mbps WiFi Operating Frequency = 5 GHz Radio cor_rev = ? Radio Capabilities = ? Radio WI2 module = Broadcom BCM94306MP WI2 module IF = Mini PCI Wireless Radio = Broadcom BCM2050 WLAN DSP processor = Broadcom BCM4306 Wireless interface OUI = none specified Antenna Connector Type = U.FL MIMO status = ? Wireless Standard = IEEE 802.11b/g 802.11g = 6, 9, 12, 18, 24, 36, 48, 54 Mbps 802.11b = 1, 2, 5.5, 11 Mbps WiFi Operating Frequency = 2.4 GHz Radio cor_rev = ? Radio Capabilities = ? Other Default IP address = 192.168.1.1 Default login user = blank Default login password = admin Default SSID = linksys-a, linksys-g OEM = Gemtek WX-5545L 3rd Party Firmware Support = DD-WRT

Links of Interest

 * How to recover error WRT55AG

Flashing DD-WRT
After flashing with the ASUS trx file, you can change to the generic VINT mini or standard using the Administration -> Upgrade Firmware tab, but whether you do that or not the 802.11a radio will no longer function, either way.

The devs are not interested in getting both radios on this working (Linksys DID release GPL source for this one, but not for v2; only 4MB of flash memory on both), so save yourself hours of frustration and just leave the stock firmware on it. If you're interested, you could salvage the 2 mini-PCI cards (one 802.11b/g and one 802.11a) from the inside... but you have to unsolder the hold-down clips to do that. Also, the swivel/jointed rubber duck antennae are not removable so nothing to salvage there, really. Rubber feet off the bottom, I guess.

Pictures of the insides are at http://www.dd-wrt.com/phpBB2/viewtopic.php?t=24378 for what it's worth.