Introduction:
With the electricity costs rising more and more, energy saving becomes (besides the ecological aspects) important from a financial point of view. So i started a campain to remove or replace devices with high energy consumption. After having replaced light bulbs with energy saving ones and eliminating useless standby "features" of consumer electronic devices it was the homeservers turn to contribute to help saving the world.
The old Server (BX Mainboard, Pentium 3 500MHz, 40GB 3.5" Hdd, 300W PSU) didn't have much potential for optimisations. So i looked for new hardware and found a internet tv streaming client called Telekom S100:
Technical data:
Hardware:
VGA Connector:
J22: ---- Pin 1 = Red Pin 3 = Green Pin 5 = Blue Pin 7 = DDC Clock Pin 8 = V-Sync Pin 9 = DDC Data Pin 10 = H-Sync Pin 2,4,6 = GND J22 --> 15 pol sub-d: --------------------- pin 1 --> Pin 1 pin 3 --> Pin 2 pin 5 --> Pin 3 pin 8 --> Pin 14 pin 7 --> Pin 15 pin 9 --> Pin 12 pin 10 --> Pin 13 pin (2),4,6 --> Pin (6,7,8),10,11 (soldered together) pin 7,9 are DDC Clock and DDC Data for Plug and Play Monitor detection (optional)
From: wiki.zenega-user.de
P/S2 keyboard and mouse:
J20: ---- 1 +5V 2 Keyboard DAT 3 NC 4 Keyboard CLK 5 NA 6 Mouse DAT 7 GND 8 Mouse CLK PS/2 port (front view): ----------------------- 1 DAT 2 NC 3 GND 4 +5V 5 CLK 6 NCFrom: wiki.zenega-user.de
S100 prior to any modding, with keyboard/mouse, VGA and "mini-IDE" to normal dektop IDE adapter. The crossed out "Fritz Card DSL SL PCI" was not used in the final box because it is virtually impossible to set up the CAPI environment and whatever else it needs in any other distribution than SuSe 8 and perhaps 9.
The VGA connectors (J22) Pin 1 ist the upper left one. Pin 1 of J20 is on the upper right. The power button was replaced with a electrolytic capacitor which has the same effect as the "restart after power loss" option the S100 bios unfortunately lacks.
The abovementioned 100uF electrolytic capacitor. After power on it acts like connected through. After some milliseconds it is fully charged and stops to let electricity pass. This simulates a short push of the power switch, just enough to start booting. So as a result the S100 is allways on if ist is plugged in.
The back panel before and after mutilation with a multifunction rotary tool (aka Dremel)
The final assembly including VGA and PS/2
I just screwd the laptop HDD to the top cover, there is enough room for a whole 2.5" datacenter.
This converter was needed to convert the TTL level of the internal serial port of the S100 to RS232 level for using it as a standard PC compatible serial port.
Software:
After connecting a USB CDROM the the installation of archlinux went without any complications. Only the AT-AR215 USB DSL modem required a bit of fiddeling:
First the firmware was needed to be put in the apropriate directory:
cd /lib/firmware/ueagle-atm/ tar -xzvf /mnt/usb0/ueagle-data-1.1.tar.gz mv /lib/firmware/ueagle-atm/ueagle-data-1.1/* /lib/firmware/ueagle-atm/After installing patch, gcc, flex and make via pacman the modem driver (linux-atm-2.4.1-2-i686.pkg.tar.gz package from AUR) can be built via makepackage. If makepackage complains probably the arch needs to be set to arch('i686') in the PKGBUILD. The driver can then be invoked via:
br2684ctl -c 0 -b -a 1.32It then creates a ethernet device called nas0 which can be used with rp-pppoe. I also added CONNECT_TIMEOUT=0 to my pppoe.conf as the dialing can sometimes fail the first time after a reboot. With this parameter pppoe tries to dial indefinitly.
#!/bin/sh # # /etc/rc.d/rc.local: Local system initialization script. # br2684ctl -c 0 -b -a 1.32 pppoe-start iptables -F iptables -t nat -F iptables -A FORWARD -i nas0 -s 192.168.0.0/255.255.0.0 -j ACCEPT iptables -A FORWARD -i eth0 -d 192.168.0.0/255.255.0.0 -j ACCEPT iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE echo 1 > /proc/sys/net/ipv4/ip_forward /usr/sbin/ddclient -daemon 300 -syslog