Conexant Fusion 878A (CX23878)
Sep 11, 2016 Download Conexant TV Tuner / Capture Card drivers, firmware, bios, tools, utilities.
A PCI interface chipset from Conexant that provides video decoder functionality.
It is supported under Linux by the bttv and associated kernel driver modules.
Overview/Features
An updated version of the former Bt878 chipset (which, upon coming under the Conexant banner, was also sometimes known or referred to as the Fusion Bt878). With the newer Fusion 878A's release, the 'Bt' (for Brooktree) was dropped from the product nomenclature. Conexant also refers to the 878A chip by the part number CX25878.
One of the updates that the 878A features is the inclusion of support for the handling of MPEG2 TS used by DVB/DTV services.
Note: Output from the lspci command is slightly misleading in that it identifies the 878A chipset by name of the Bt878 chipset, e.g.:
- 0000:02:05.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
insert a Bt87x vs 878A comparison table here
Features
- Composite input
- S-Video input
- I2S digital audio input
- FM Radio
- Mono audio input(microphone)
- I2C
- VBI (teletext, closed captioning and Intercast)
- GPIO
- PCI v2.2
- ODFM and VSB
- ATSC, PAL/SECAM/NTSC support
![Conexant Fusion 878a Tv Tuner Driver Conexant Fusion 878a Tv Tuner Driver](/uploads/1/2/6/2/126229485/684089995.jpg)
Note: This section below needs to be edited -- remove: first person; bias etc.
When DVB came along, I guess the manufacturers of the TV cards were used to working with this chip so the digital audio input interface was co-opted to take the MPEG-2 transport stream.
Like the Philips SAA7146 based DVB PCI card designs, this chipset misuses the analog video input of the chip to sample the MPEG-2 Transport Stream in video lines of the framebuffer, programming this is kind of a pain. The original idea behind it was that when you had a window obscured on your display, or you wanted to crop a bit of the input image, you could build a RISC program that just copied the parts of the video lines you wanted, and thus not waste any PCI bandwidth.
The BT878 provides one function each for Video and Audio onto the PCI bus. The two functions have different memory mappings although they have many similar registers - e.g. the I²C bus is only available via the video function and the DVB stream is only available via the audio function. ('function' is a PCI term ... most PCI devices have only one of them...)
We should mention here that I²C probing on a per-address basis is inale since most DVB I²C devices have configurable I²C addresses (not to mention that the basic I²C spec only allows 7-bit addresses, so in theory only 127 different devices would be allowed on the market). unfortunately Linux kernel-I²C folks and their addicted fans don't really like the idea of direct access to the I²C Bus like it is common in STBs and mobile devices. So this 'missing feature' or 'bug' of the BT878 is not really a chip design flaw but more a misinterpretation of the I²C Protocol Specification of the kernel-I²C folks that had been the cause of some mail threads fought with religious persuasion in the past. See the relevant section in Philosophy and holy Wars or check the linux-dvb mailing list archives.
External Links
- Conexant product page
Retrieved from 'https://www.linuxtv.org/wiki/index.php?title=Conexant_Fusion_878A&oldid=30347'
Supported Models
Manufacturers
Supported Operating Systems
Windows XP
File Name
Winxp.zip (12.2 MB)
Versions
5.2.4.0 (2001-08-22) via .inf
Find Related Drivers
Uploader Notes
Driver for card with the Conexant Fusion 878a chip, tested and verified
Uploaded By
zee (DG Member) on 15-May-2003
Most Helpful Reviews
27 of 29 people found the following review helpful:
11 Aug 2008
(47 minutes after download)
(47 minutes after download)
Stability:
'After lots of testing, and all other drivers failed, FINNALY! a Driver that is compatible with Pinnacle Systems TV Card (chip Conexant Fusion 878A) and works on Windows XP! EXCELENT!!!'
13 of 15 people found the following review helpful:
1 Aug 2007
![Fusion Fusion](https://i0.wp.com/unifeed.club/image/OIP.V3ylrZLfyjLEWcAXUx8NsQHaEw/conexant-fusion-878a-tv-tuner-card-driver-download-hackmixe.jpg)
Stability:
'guys the driver is installed and the app. but there's a problem on the appl. , cannot find freq.tbl? what's that mean? my tuner is conexant fusion 878a pci, send me your suggestions.. or driver and application., thanks'
6 of 7 people found the following review helpful:
6 Jun 2005
Stability:
'This installed quite elegantly, ran through four steps, installing audio capture, video capture, tv tuner, & crossbar.'
32 of 38 people found the following review helpful:
6 Feb 2008
Stability:
'I used this driver with its video capture card. It did ok in transfering to a video file, but the playback skipped frames on occasion and sound/video are out of sync by about 1.5 seconds.'
5 of 6 people found the following review helpful:
24 Dec 2007
Stability:
'the site is very helpful in finding most drivers.I have no doubt they can help in any situation'
Already tried it? Give your review.
Supported Devices
AVerMedia, AVerTV WDM Audio Capture
Manufacturer | Conexant |
---|---|
Class | MEDIA |
Hardware Ids | |
Compatible Hardware Ids |
AVerMedia, AVerTV WDM Crossbar
Manufacturer | Conexant |
---|---|
Class | MEDIA |
Hardware Ids | |
Compatible Hardware Ids |
AVerMedia, AVerTV WDM TvTuner
Manufacturer | Conexant |
---|---|
Class | MEDIA |
Hardware Ids | |
Compatible Hardware Ids |
AVerMedia, AVerTV WDM Video Capture
Manufacturer | Conexant |
---|---|
Class | MEDIA |
Hardware Ids | |
Compatible Hardware Ids |
Driver Contents File List
The following files are found inside the driver download file.
Name | Size | Date |
---|---|---|
WinXP/Driver/Bt878.inf | 9.6 KB | 22 Aug 2001 |
WinXP/Driver/btxbar.sys | 13.3 KB | 22 Aug 2001 |
WinXP/Driver/bttuner.inf | 4.7 KB | 22 Aug 2001 |
WinXP/Driver/catxbar.CAT | 8.0 KB | 22 Aug 2001 |
WinXP/Driver/btxbar.inf | 4.2 KB | 22 Aug 2001 |
WinXP/Driver/readme.txt | 4.3 KB | 23 May 2001 |
WinXP/Driver/cattuner.cat | 8.0 KB | 22 Aug 2001 |
WinXP/Driver/cat878.CAT | 8.9 KB | 22 Aug 2001 |
WinXP/Driver/IOCtrl.dll | 49.2 KB | 28 Jun 2001 |
WinXP/Driver/bttuner.sys | 19.5 KB | 22 Aug 2001 |
WinXP/Driver/avertv2K.dll | 61.4 KB | 28 Jun 2001 |
WinXP/Driver/bt848.sys | 260.8 KB | 22 Aug 2001 |
WinXP/Application/disk6/data6.cab | 1.4 MB | 15 Aug 2001 |
WinXP/Application/disk7/data7.cab | 1.2 MB | 15 Aug 2001 |
WinXP/Application/disk3/data3.cab | 1.4 MB | 15 Aug 2001 |
WinXP/Application/Disk1/layout.bin | 551 bytes | 15 Aug 2001 |
WinXP/Application/Disk1/_sys1.cab | 203.9 KB | 15 Aug 2001 |
WinXP/Application/Disk1/_ISDEL.EXE | 8.7 KB | 27 Jan 1998 |
WinXP/Application/Disk1/setup.lid | 49 bytes | 15 Aug 2001 |
WinXP/Application/Disk1/SETUP.EXE | 60.4 KB | 23 Jan 1998 |
WinXP/Application/Disk1/DATA.TAG | 124 bytes | 15 Aug 2001 |
WinXP/Application/Disk1/os.dat | 417 bytes | 6 May 1997 |
WinXP/Application/Disk1/setup.ins | 67.9 KB | 15 Aug 2001 |
WinXP/Application/Disk1/data1.cab | 591.4 KB | 15 Aug 2001 |
WinXP/Application/Disk1/SETUP.INI | 65 bytes | 15 Aug 2001 |
WinXP/Application/Disk1/_SETUP.DLL | 11.3 KB | 23 Jan 1998 |
WinXP/Application/Disk1/SETUP.BMP | 95.2 KB | 10 Jun 1999 |
WinXP/Application/Disk1/_user1.cab | 108.0 KB | 15 Aug 2001 |
WinXP/Application/Disk1/lang.dat | 4.5 KB | 20 Oct 1997 |
WinXP/Application/Disk1/_INST32I.EX_ | 290.7 KB | 23 Jan 1998 |
WinXP/Application/disk2/data2.cab | 1.4 MB | 15 Aug 2001 |
WinXP/Application/disk5/data5.cab | 1.4 MB | 15 Aug 2001 |
WinXP/Application/disk4/data4.cab | 1.4 MB | 15 Aug 2001 |
WinXP/Plugins/MPIE4FUL.EXE | 2.5 MB | 4 Nov 1998 |