I own Pentagram Cerberus P 6311-07A router, which is probably some branding-job of polish Pentagram company.

I've opened it and checked it's components:

CPU: Trendchip TC3162L2 / TC3085
ADSL: Trendchip TC3162L2 / TC3085
SWITCH: IC+ IP175C
RAM: HY57V641620FTP-H (64Mb = 8MB, 133MHz)
FLASH: MX29LV160CBTC-70G (16Mb = 2MB)

I've found following documentation for that elements:
http://www.trendchip.com.tw/bridge.html
http://www.icplus.com.tw/pp-IP175C.html
http://www.hynix.com/inc/pdfDownload.js … ev1.0).pdf

I don't really understand that TC3162L2 / TC3085. It looks like CPU split into two blocks...

Do you have idea what platform and architecture can this CPU be? Is this CPU supported by OpenWrt?

I know 2MB of flash is really small capacity, but read that is still possible to put some simple OpenWrt version on it.

(Last edited by Zajec on 2 Oct 2009, 17:14)

I Googled for this Pentagram router and found info this can have the same hardware as some TP-LINK. I found two similar TP-LINK models (no wifi, 4 ethernet ports, ADSL, USB): TD-8841 and TD-8841T. Comparing specifications of these models I found out my Pentagram is clone of TD-8841T (T stands for TrendChip).

Then I compared firmwares from TP-LINK site (for both models) using "strings" console application:

1) TD-8841's firmware contains some Linux-like strings: /var/log/logA, /var/udhcpd/udhcpd.conf1, /var/passwd!, netfilter, 2.6.8.1, ld-uClibc.so.0 and so on. You can even find source of firmware on http://www.tp-link.com/support/gpl.asp

2) TD-8841T's firmware doesn't contain such strings, and doesn't have firmware on http://www.tp-link.com/support/gpl.asp . So I belive it's not using Linux unfortunately.

Still I don't have any idea what architecture this Pentagram/TD-8841T is based on. And if this architecture is supported by Linux.

Honestly, a router with 8MB RAM is pretty much useless, AFAIK. You are better off to get a router with more RAM if you want to run any open-source firmware.

Thank you for reply! I don't expect much from this router. It's more about learning hardware, OpenWrt, supporting not-yet-supported devices, finding serial myself, experimenting with USB, LEDs, failsafe mode and so on... Generally it's more for my fun that real needs.

For my real routing job I've bought Linksys WRT160NL, but that's another topic

Using telnet I connected to this router and noticed it's interface is ZynOS's interface. So this *can* be adm5120eb as it's platform supported by ZynOS. But maybe ZynOS can also run on other platforms and my router is one of these? Not sure who could I ask for this except you guys

Ooops ..., my apology to previously post this here.

(Last edited by mazilo on 4 Oct 2009, 02:07)

Err, is that related to my router?

I think it is MIPS, I have similar problem http://forum.openwrt.org/viewtopic.php?id=21863 (only P2 not L2 version). Same chipset is mentioned in this forum http://mybroadband.co.za/vb/showthread. … amp;page=4 or this http://forums.whirlpool.net.au/forum-re … 03816.html too, and finaly in that forums is link to linux source code for modem with Trendchip chipset.