CronScript's Journal: WRT54GS v.3 3rd party firmware compatibility

CronScript has recently purchased two Linksys WRT54GS v.3 routers which were running the Linksys 4.70.6 firmware.

Sveasoft Alchemy V1.0 firmware bricked the router. Don't try it! It is not compatible with the GS v.3 hardware. Shorting pins 5 and 6 on the flash booted the unit into failsafe mode and allowed a tftp firmware upload.

FreemanBasic V1.0.4 gave me upgrade failed errors.

DD-WRT v22, all versions, gave me upgrade failed errors. DD-WRT v23 should work on this router, but read the wiki before attempting to use it as you have to pick the correct firmware edition.

The Thibor release of HyperWRT 201105 did flash to the router and seems to work well. Supposedly, after flashing HyperWRT, the router will allow flashing Freeman and DD-WRT but I haven't tried this yet. Apparently, the bootloader shipped with the Linksys 4.70.6 firmware checks version numbers on the incoming firmware and refuses to do a downgrade.