TeleVideo TC7020

This page describes how to use the TeleVideo TC7020 thin client with coreboot.

Status

Device/functionality	Status	Comments
CPU
CPU works	OK	Geode GX1
L1 cache enabled	OK
L2 cache enabled	N/A	This CPU does not support L2 cache.
L3 cache enabled	N/A
Multiple CPU support	N/A
Multi-core support	N/A
Hardware virtualization	N/A
RAM
EDO	N/A
SDRAM	OK	Tested with 256MiB module
SO-DIMM	N/A
DDR	N/A
DDR2	N/A
DDR3	N/A
Dual channel support	N/A
ECC support	N/A
On-board Hardware
On-board IDE 3.5"	N/A
On-board IDE 2.5"	OK	Tested with 2.5" 160G disk.
On-board SATA	N/A
On-board SCSI	Unknown
On-board USB	OK	Tested with USB DVD writer
On-board VGA	OK	Console, X11
On-board ethernet	OK
On-board audio	Unknown
On-board modem	N/A
On-board FireWire	N/A
On-board smartcard reader	N/A
On-board CompactFlash	N/A
On-board PCMCIA	N/A
Add-on slots/cards
ISA add-on cards	N/A
Audio/Modem-Riser (AMR/CNR) cards	N/A
PCI add-on cards	OK	Tested MiniPCI slot with a WiFi card. IRQ is only available for INTA pin.
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
Floppy	N/A
Serial port 1 (COM1)	OK
Serial port 2 (COM2)	OK
Parallel port	Unknown	Running modprobe ppdev works fine, but further tests were not done, yet.
PS/2 keyboard	OK
PS/2 mouse	OK
Game port	N/A
Infrared	N/A
PC speaker	N/A
DiskOnChip	N/A
Miscellaneous
Sensors / fan control	N/A	This CPU does not need a fan.
Hardware watchdog	Unknown
SMBus	Unknown
CAN bus	N/A
CPU frequency scaling	Unknown
Other powersaving features	Unknown	GPIO pin assignment for power management hardware is unknown
ACPI	N/A
Reboot	OK	Linux supports this chipset to force a hard reset.
Poweroff	NG	GPIO pin assignment for power management hardware is unknown
Suspend	Unknown
Nonstandard LEDs	OK
High precision event timers (HPET)	N/A
Random number generator (RNG)	N/A
Wake on modem ring	N/A
Wake on LAN	NG	Factory WinCE BIOS works but not with Coreboot
Wake on keyboard	N/A	Doesn't seem to be supported
Wake on mouse	N/A	Doesn't seem to be supported
Flashrom	N/A

Hardware

TeleVideo TC7020 thin client.	The backpanel.
The mainboard.

Overview

• GX1 Cyrix/National/AMD CPU with 300MHz core clock
• CS5530A-UCE part of the chipset, Cyrix/National/AMD companion device
• PC97317 Super I/O
• DP83815 National Semiconductor network controller
• LM4546 National, AC97 AD/DA
• SDRAM 64MiB SDRAM

Connectors

External:

• 1x PS/2 keyboard
• 1x PS/2 mouse
• 2x serial port (COM1, COM2)
• 1x parallel port
• 2x USB (OHCI)
• 1x DSUB15 VGA analogue
• 1x RJ45
• Audio: stereo line-out, mic

Internal:

• 1x 44pin 2mm 2.5" HDD connector with a detachable CompactFlash adapter
• 1x DIMM slot
• 1x MiniPCI slot

lspci -tvnn

-[0000:00]-+-00.0  Cyrix Corporation PCI Master [1078:0001]
           +-12.0  Cyrix Corporation 5530 Legacy [Kahlua] [1078:0100]
           +-12.1  Cyrix Corporation 5530 SMI [Kahlua] [1078:0101]
           +-12.2  Cyrix Corporation 5530 IDE [Kahlua] [1078:0102]
           +-12.3  Cyrix Corporation 5530 Audio [Kahlua] [1078:0103]
           +-12.4  Cyrix Corporation 5530 Video [Kahlua] [1078:0104]
           +-13.0  Compaq Computer Corporation ZFMicro Chipset USB [0e11:a0f8]
           \-15.0  National Semiconductor Corporation DP83815 (MacPhyter) Ethernet Controller [100b:0020]

Building a coreboot image

First, build a payload (e.g. FILO) and copy it to /tmp/filo.elf. Then:

$ cd targets
$ ./buildtarget televideo/tc7020
$ cd televideo/tc7020/tc7020
$ LANG=C make

Further information

• http://www.linuxbios.org/pipermail/linuxbios/2007-April/019878.html
• http://www.linuxbios.org/pipermail/linuxbios/2007-April/019959.html
• http://www.coreboot.org/pipermail/coreboot/2007-December/027973.html

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