1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Can you convert a WRT54G to a WRT54GS ?

Discussion in 'Cisco/Linksys Wireless Routers' started by virgil, Nov 9, 2005.

  1. virgil

    virgil Network Guru Member

    I read in Autopsy: Linksys WRT54G/GS Hardware Versions Under the Knife that

    This is confirmed here by 16vturbovolvo and koitsu - the use of TE28F320 Intel Flash and HY5DU281622ET-J Hynix RAM which is the same memory combo in WRT54G v4.0.

    In short it seems WRT54G v4.0 and WRT54GS v4.0 are identical in terms of hardware components. :clap:

    Both run GPL/Linux and support 3rd party FW. The latest firmware for the WRT54GS v4.0 is 1.05.2 dated 9/15/2005 and released 10/5/2005 whose .bin file is 2884608 bytes while that of the WRT54G v4.0 is 4.20.7 dated 8/18/2005 and released 8/25/2005 is also 2884608 bytes - both which can easily fit the 4MB flash chip. :thumb:

    ( NOTES:
    1. Linksys says the GS v4.0 firmware 1.05.2 is not compatible with WRT54GS hardware version 1.0, 1.1, 2.0, 2.1 or 3.0.
    2. The latest GS v3.0 firmware 4.70.6 dated 5/27/2005 and released 7/20/2005 has a .bin file of 3097600 bytes. )

    Now ybbmadysu says here that he was able to convert his WRT54G to run WRT54GS firmware. :cheering:

    However, no one has confirmed any differences in the radio implementation - although they use the same Broadcom chips.

    So the questions that beg an answer are: :drinking:

    1. Is SpeedBooster implemented only in the firmware and driver code?

    2. Can I flash a WRT54G v2.2~v4.0 with WRT54GS v4.0 1.05.2 firmware to run SpeedBooster?

    3. Can I flash my WRT54G v2.2~4.0 with WRT54GS v3.0 4.70.6 firmware?
  2. gaster

    gaster Network Guru Member

    dd-wrt allows turning speedbooster on, but I don't have a speedbooster card to try it with.
  3. virgil

    virgil Network Guru Member

    An article in PCMag Jan 2004 here says:

    Broadcom Corp appears to have broken the wireless speed barrier today with the official launch of its new AfterBurner Technology that reportedly will enable routers to reach a data rate of 125 Mbps (with true data throughput in the middle 30's) while remaining compliant with other 802.11 wireless devices.

    The AfterBurner Technology enhancement is purely a proprietary software solution which mainly consists of switching from an ACK-based policy to a NACK-based policy to increase efficiency, according to Broadcom representatives. However, this is a proprietary solution--to take advantage of the high data rate, the consumer will have to possess a wireless card and router compliant with the AfterBurner technology.

    "The key mechanism for improving throughput is closing down the timing between packets," said Jeff Abramowitz, senior director of WLAN marketing for Broadcom. He went on to explain that this "clamping down" of time between packets is what gives the AfterBurner technology its high 125 Mbps throughput.
  4. Toxic

    Toxic Administrator Staff Member

    Speedbooster will only work with other Speedbooster devices. if you have a WRT54GS but no other GS products then speedbooster is useless.

    125 wirless throughput is a myth.

    54G card put ut a throughput of approx 22Mbps-24Mbps

    54GS (with Speedbooster) gives out approx 28Mbps-32Mbps
  5. virgil

    virgil Network Guru Member

    That pretty much matches their claims of SpeedBooster providing about 30% improvement in throughput.

    Also note one cannot use SpeedBooster while bridging two WRT54GS's as WDS mode requires AfterBurner be turned off

    Still, some others claim that GS units have improved range and better encryption support...

    And undivine observed here that WRT54GS v4.0 1.05.2 firmware has some features removed.

    I am just asking for curiosities sake - can anyone confirm that SpeedBooster/AfterBurner is merely implemented in the firmware - or is there some microcode embedded in the WRT54G Broadcom chips that prevents one from enabling it on the WRT54G?
    That's how I would implement it if I wanted to charge license fees ... :(

Share This Page