I buy a TP841 ,and then found that,It's V8!!
It take a new cpu AR9341!! Ram 16M !!This is the TTL message
Software Platform for MIPS
Creation date: Jul  5 2011, 09:13:06 (huangqingjia@tp-link.net)
Copyright(C) 2001-2012 by TP-LINK TECHNOLOGIES CO., LTD.
CPU: AR9341: AP123 Board
CPU freq: 500 MHZ
SDRAM size: 16 MB
ipaddr:192.168.1.1
serverip:192.168.1.100
file:vxWorks.img


Press Ctrl+C to stop auto-boot...
0
auto-booting...
Uncompressing...done
Starting at 0x80001000...

Attaching interface lo0... done
Rx clbufs 512 each of size 1756
eth_rx_netpool_init: allocated, pDmaBuf=0x80e4e3e0, buffend = 80f2abe4
ATHRS27: resetting s27
ATHRS27: s27 reset done
eth_rx_netpool_init: done already!
Attached IPv4 interface to mirror unit 0
usrAppInitEx: 112: GPIO_OE = 30300
usrAppInitEx: 113: CP0 CONFIG = 80208483
usrAppInitEx: 114: CP0 CONFIG1 = bee3519e

-->starting wireless...
APCFG task id 80c7d450
sysWlanInit ...
Create WLAN event task tWLANEventTask
Create mem partion 0x80c69c20 for size 28672
AH_CAL_IN_FLASH_AHB
Boostrap clock 25MHz
ar9300RadioAttach: Need analog access recipe!!
Restoring Cal data from Flash
ath_get_caps[4703] rx chainmask mismatch actual 3 sc_chainmak 0
ath_get_caps[4678] tx chainmask mismatch actual 3 sc_chainmak 0
Create OS_MESGQ Successfully at 0x80c58630
osifp->queue_head = 0x80c58930
ag7240MemInit: allocated, dmabuf=0x80ba3c10, buffend = 80c4be14
Entering Task Loop
Entering WLAN event Task Loop
ERROR:wireless OR ACL disable
sending message 80b7f3e0,24
sending message 80b7f3e0,24
TDDP: Now listening client request.
tddp is running.
httpInit: System File Registry successfully initialized.
httpInit: System File Manager successfully initialized.
httpInit: File System RPM successfully initialized.
httpInit: RPM dispatcher successfully initialized.
httpInit: MIME type guessing RPM successfully initialized.
httpInit: http Password Checking successfully initialized.
httpInit: http Access Control successfully initialized.



                            Software Platform for MIPS
  Copyright(C) 2001-2010 by TP-LINK TECHNOLOGIES CO., LTD.
Starting  Creation date:  WLJul  5 2011, 10:13:42AN !!!!

# AP_STARTMODE=standard
AP_ENABLE=1
ATH_COUNTRYCODE=156
wlan_vap_create : enter. devhandle=0x8043ef60, opmode=IEEE80211_M_HOSTAP, flags=                                         0x1
wlan_vap_create : exit. devhandle=0x8043ef60, opmode=IEEE80211_M_HOSTAP, flags=0                                         x1.
osif_ioctl_create_vap: vap 0x80ffe970 vap->iv_unit 0
ieee80211_end_load: load done
ath0 end flag = 0x00028802
default
default
default
IEE80211-FREQ IOCTL vap 0x80ffe970 0,0,0
AP_CHMODE=11NGHT40PLUS

WLAN IOCTL AP_CHMODE=11NGHT40PLUS=11NGHT20=11NGHT40PLUS=1003
IEE80211-MODE IOCTL 1,11NGHT40PLUS,13
set mode 11,-2130709132,6
set mode retv 0

WLAN IOCTL AP_PRIMARY_CH=auto=6=auto=1002
IEE80211-FREQ IOCTL vap 0x80ffe970 0,0,11

WLAN IOCTL PUREG=0=0=0=1004
IEEE80211-SETPURGE IOCTL 0

WLAN IOCTL AP_HIDE_SSID=0=0=0=1005
IEEE80211-SETHIDESSIDIOCTL 0

WLAN IOCTL AP_ISOLATION=0=0=0=1034
IEE80211-setparam-nobridge 0

WLAN IOCTL AP_TX11NRATE==0x0=0x0=1041
set auto rate

WLAN IOCTL AP_11G_PROTECTION==0=0=1042

WLAN IOCTL AP_BEACON_INTERVAL=100=100=100=1043

WLAN IOCTL AP_FRAGMENT_THRESHOLD=2346=2346=2346=1044

WLAN IOCTL AP_RTS_THRESHOLD=2346=2347=2346=1046

WLAN IOCTL AP_DTIM_PERIOD=1=1=1=1045

WLAN IOCTL AP_WMM_ENABLE=1=1=1=1051

WLAN IOCTL AP_WMM_NOACK==0=0=1052
IOCTL set wmm noack 0

WLAN IOCTL AP_CYPHER_2==CCMP=CCMP=1000
Get EIOCGADDR

WLAN IOCTL AP_NO_EDGE_CH==0=0=1056

WLAN IOCTL AP_MCASTRATE==0=0=1018

WLAN IOCTL AP_MACFILTER_MODE==0=0=1038

WLAN IOCTL AP_MACFILTER_LIST====1000
Get EIOCGADDR

WLAN IOCTL AP_SHORT_GI=1=1=1=1055

WLAN IOCTL AP_DISABLECOEXT=1=0=1=1075

WLAN IOCTL AP_SSID=MERCURY_C9495E=Ath_AP123ng=MERCURY_C9495E=1001
IEE80211-ESSID IOCTL 1,MERCURY_C9495E,15
AP_CHMODE=11NGHT40PLUS
AP_CWMMODE=1
IEE80211-CWMMODE IOCTL 1
AP_AMPDU=0
AP_PURE_N=0
AP_TX_CHAINMASK=3
AP_RX_CHAINMASK=3
AP_SECMODE=None
WPS_ENABLE=1
AP_MACFILTER_MODE=0
ieee80211_open

WLAN IOCTL AP_BASICRATES==0=0=1039

WLAN IOCTL AP_DEBUG=0=0=0=1062

WLAN IOCTL AP_TX_POWER==0=0=1073
Starting Hostapd
AP_SSID=MERCURY_C9495E
AP_HOSTAPD_DEBUG=0
AP_IPADDR=192.168.1.2
AP_SECMODE=None
WPS BSS init
WPS_ENABLE=1
WPS_PIN=68663353
WPS_STATE=1
1136073605.416667: wps_led_init: LED state UNCONFIGURED
AP_SECMODE=None
WPS OPEN BSS init
starting hostapd ...
Hostapd task Created 80ff6c60
Task details [80ff6c60,,64,80c7d1e8]
Adding ath0 in bridge ...
default
Set EIOCGMIB2
default
Entering Hostapd Main
default
Set EIOCGMIB2
attached backend socket .
Attached backend socket for eth0
Attached backend socket for eth1
Attached backend socket for mirror 0
@@@@ kris-hostapd @@@@@ wiface=ath0 @@@@
**** [0,1,0,0192.168.1.2,]****
Just before eloop_run()
*** setup interface1 started ****
Eapol sockfd=27
Get EIOCGADDR
MAC address 40,16,ffffff9f,ffffffc9,49,5e
link _ubind0,0,0,0,0,0
IEE80211-IWMODE IOCTL  3
IEE80211-setparam-privacy 0
1136073607.416667: Defaulted uuid based on mac addr 40:16:9f:c9:49:5e
ieee80211_ioctl_setappiebuf
ieee80211_ioctl_setappiebuf
ieee80211_ioctl_setappiebuf
1136073607.416667: madwifi_start_receive_prob_req Enter

Madwifi init completed
1136073607.416667: ENTER eap_wps_disable, reason=7
*** setup interface1 completed ****
*** setup interface2 started ****
1136073607.433333: Flushing old station entries
IOCTL setmlme
[ieee80211_ioctl_setmlme:1887] data=0x80ff6780,data->pointer=0x80ff67d0, data->length=42
[ieee80211_ioctl_setmlme:1893] mlme->im_op=3
1136073607.450000: Deauthenticate all stations
IEE80211-setparam-privacy 0
ieee80211_ioctl_delkey : idk_keyix=0
ieee80211_ioctl_delkey : idk_keyix=1
ieee80211_ioctl_delkey : idk_keyix=2
ieee80211_ioctl_delkey : idk_keyix=3
Using interface ath0 with hwaddr 40:16:9f:c9:49:5e and ssid 'MERCURY_C9495E'
1136073607.483333: SSID - hexdump_ascii(len=14):
     4d 45 52 43 55 52 59 5f 43 39 34 39 35 45         MERCURY_C9495E
1136073607.483333: PSK (ASCII passphrase) - hexdump_ascii(len=0):
1136073607.766667: PSK (from passphrase) - hexdump(len=32): 21 5e a2 b2 01 30 c4 e6 89 3b c9 0d 0b e1 f8 3b 55 bd 08 3b 71 30 09 58 fd 91 71 70 1c bb 77 0a
IEE80211-ESSID IOCTL 1,MERCURY_C9495E,15
osif_vap_init :vap up
IEE80211-setparam-authmode 1
osif_vap_init :vap up
osif_vap_init 0
hostapd_ctrl_iface_init
1136073607.816667: upnp_wps_device_init called
1136073607.816667: upnp_wps_device ssdp_listener_start failure!
1136073607.816667: upnp_wps_device_stop ENTER
1136073607.816667: upnp_wps_device_deinit called
1136073607.816667: upnp_wps_device_stop ENTER
1136073607.816667: Failed to initialize UPnP state machine
1136073607.816667: Continuing with WPS UPnP disabled.
****setup interface2 completed****
1136073607.816667: ath0: Setup of interface done.
****setup interface finalized ****

Can this machine firmware openwrt?