The RCA RM4100 was originally designed by Thomson Electronics and was called the IP1000. I was then manufactured by RCA and named the RM4100. It is the Thomson IP1000's little brother. It is a great little set-top-box for coreboot. Maintained by Joseph Smith.
A full boot log of this board running coreboot is available for reference.
|CPU works||OK||Mobile Intel(R) Celeron(TM) CPU 733MHz.|
|L1 cache enabled||OK|
|L2 cache enabled||OK||256 KB|
|L3 cache enabled||N/A|
|Multiple CPU support||N/A|
|SO-DIMM||OK||Onboard 128MB PC133.|
|Dual channel support||N/A|
|On-board IDE 3.5"||OK||Tested with hard drive.|
|On-board IDE 2.5"||OK||Tested with 2.5" hard drive and adapter.|
|On-board USB||OK||Tested with USB keyboard.|
|On-board VGA||OK||VGA support in coreboot works fine. TV-Out is still a WIP.|
|On-board ethernet||OK||Onboard Intel 82562ET LAN On Motherboard (LOM) Design.|
|On-board modem||Untested||Detected by the kernel ok, but has not been tested.|
|On-board smartcard reader||N/A|
|ISA add-on cards||N/A|
|Audio/Modem-Riser (AMR/CNR) cards||N/A|
|PCI add-on cards||N/A|
|Mini-PCI add-on cards||Unknown|
|PCI-X add-on cards||Unknown|
|AGP graphics cards||N/A|
|PCI Express x1 add-on cards||N/A|
|PCI Express x2 add-on cards||N/A|
|PCI Express x4 add-on cards||N/A|
|PCI Express x8 add-on cards||N/A|
|PCI Express x16 add-on cards||N/A|
|PCI Express x32 add-on cards||N/A|
|HTX add-on cards||N/A|
|Legacy / Super I/O|
|Serial port 1 (COM1)||OK|
|Serial port 2 (COM2)||OK||IR is connected to COM2. Tested: Wireless (IR) keyboard on COM2.|
|Parallel port||OK||There is no actual Parallel connector, the Parallel is used to enable IR and control 3 LEDs.|
|Infrared||OK||Should work fine but has not been tested with lirc and a remote yet.|
|Sensors / fan control||OK||lm-sensors uses i801, smsc47m192.|
|CPU frequency scaling||Untested|
|Other powersaving features||WIP|
|Nonstandard LEDs||OK||Controlled by parallel port.|
|High precision event timers (HPET)||N/A|
|Random number generator (RNG)||N/A|
|Wake on modem ring||Untested|
|Wake on LAN||Untested||Enabled on LOM Design, should work fine but untested.|
|Wake on keyboard||Untested||Supported by the Super I/O but not implemented.|
|Wake on mouse||N/A|
|Flashrom||OK||Should work since flashrom version r3145.|
- Low Voltage Intel® Celeron® processor (Micro-FC-BGA) 733MHz
- Intel 830M northbridge
- Intel 82801DB (ICH4) southbridge
- SMSC LPC47M192 Super I/O
- ST M50FW080 8-Mbit (1Mbx8) Firmware Hub (FWH) flash memory
- 128MB PC133 SDRAM on board
- Two USB 2.0 ports
- 2 Ultra-ATA/100/66/33 IDE channels (no connectors)
- 64MB Compact Flash via IDE controller (upgradeable)
- Integrated 10/100 Intel 82562ET LAN On Motherboard (LOM)
- Integrated 2D and 3D graphics with AGP 4X interface
- Conexant CX25873-13 High Performance Video Encoder
- Optical SPDIF output (Dolby Digital)
- Composite and S-Video outputs (can deliver either NTSC or PAL video)
- Sigmatel STAC9767 AC’97 2.3 20-Bit audio controller
- Integrated Conexant CX81801-94 SmartV.XX V.92, V.34, V.32 data modem
- IR receiver for remote / keyboard
- 3 LEDs with GPIO control
VGA vs. Headless
Before building coreboot for the RCA RM4100 there are a few settings to consider. Depending on whether you want VGA support or not, you might have to modify some files.
Headless (no VGA)
You have the ability to build a "headless" version of coreboot that will only output to the serial console:
Edit targets/rca/rm4100/Config.lb and change:
# option ROM_SIZE = 1024 * 1024 option ROM_SIZE = (1024 * 1024) - (64 * 1024)
option ROM_SIZE = 1024 * 1024 # option ROM_SIZE = (1024 * 1024) - (64 * 1024)
option CONFIG_CONSOLE_VGA = 1 option CONFIG_PCI_ROM_RUN = 1
option CONFIG_CONSOLE_VGA = 0 option CONFIG_PCI_ROM_RUN = 0
option CONFIG_VIDEO_MB = 8
option CONFIG_VIDEO_MB = 0
If you do want VGA you can choose how much memory is pre-allocated for VGA. Note: You can still use the serial console when VGA is enabled. Possible options are:
## 0 for No memory pre-allocated (Graphics memory Disabled) ## 512 for DVMT (UMA) mode, 512K of memory pre-allocated for frame buffer ## 1 for DVMT (UMA) mode, 1M of memory pre-allocated for frame buffer ## 8 for DVMT (UMA) mode, 8M of memory pre-allocated for frame buffer
To adjust this edit targets/rca/rm4100/Config.lb, edit the line
and change it to any of the options above. Note: Remember that if you do want VGA you will need the VGA BIOS file (vga.rom).
like instructed in the INSTALL directions and then edit the file Config.
MENULST_FILE = "hda3:/boot/filo/menu.lst"
to (menu.lst is a symlink to grub.conf and FILO does not like that)
MENULST_FILE = "hda1:/grub/grub.conf"
to boot to GRUB on the Compact Flash card or
MENULST_FILE = "hdc1:/grub/grub.conf"
to boot from the harddrive (if you have the HD hack installed).
#SERIAL_SPEED = 115200
SERIAL_SPEED = 115200
to insure we get output to the serial console. That should be it. Now you can run
again to build your payload ELF file. Once that finishes copy filo.elf to the /tmp directory, or you can adjust targets/rca/rm4100/Config.lb to point to where filo.elf is.
You can further reduce the size of filo.elf by disabling various unneeded options in FILO's Config file (e.g. support for filesystems you don't use).
Now we are ready to build coreboot.
See the Build HOWTO for information on how to build coreboot for this board.
See VGA support for information on how to add support for the onboard VGA controller.
At last you're ready to flash bios.bin to your RM4100. If this is the first time, meaning your RM4100 still has the original BIOS, you need to use the method described on the Howto install coreboot & Linux on the RM4100 article to flash, otherwise you can just use flashrom.
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