Controllerless V.90/K56flex PCI Twin-chip Chipsets
Usage: To find other modems in the same chipset Family.
All drivers, downloads & info on this site are found via the modem.
Each Modem Manufacturers’ page also has external web-links, where available.
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General Information
- Originated by Rockwell on 3 Jun 1998, this became one of the company’s most successful chipsets. It contains a DSP but all controller functions are handled by software on the host computer. Originally only Windows drivers were provided, but more recently Conexant has extended driver support to the Linux platform. If an old Windows driver is updated the modem name may change, and will need to be altered on the General page of Dial-Up Networking Properties.
The RCV56HCF-PCI & RH56D-PCI appear to have been a co-development, distinguished only by the type of packaging for the DSP chip (PQFP for this, TQFP for the RCV56HCF-PCI). A common 11229 PCI-interface chip was used for both. The single-chip HCF MonoPak were a development of these twin-chip chipsets, although a single-chip BGA package was originally offered & clearly bombed. This is how the DSP family looks from new to old:
- HCF MonoPak - R6795
- RH56D-PCI - R6789 (twin) - this chipset
- RCV56HCF-PCI - R6785 (twin)
- RCV56HCF-PCI - R7156 (BGA)
A low-power version of this chipset--the RH56LD-PCI--offers a cellular interface, whilst the single-chip mobile version--the RMH56LD--can be used for mini-PCI & also CardBus designs.
Extra Info
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Country (how to find)
- Via Control Panel applet, or AT+GCI command to select (depends on options placed at install time in Registry)
Copyright Statement
Compilation, original writings & design Copyright ©2002 - 2013 Modem-Help, Ltd.
All trademarks respected as the property of their respective owners.
Full Copyright + Disclaimer statement
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Quick Stats
Items available:
- 14,260 modems
- 1,747 chipsets
- 2,245 chips
- 803 modem mfcs
- 121 comp/MB mfcs
- 1,706 comps/MBs/retail
- 144 chipset mfcs
- 22,749 external web links
- 141,338 hardware IDs
- 221,963 download files
† Key
Mfc: the company no longer makes/supplies modems and/or their chipsets, or has been taken over, or otherwise fallen into commercial Tophet.
Modem: it is no longer in production.
Chip, Chipset, Family or Family-Type: it is no longer produced at the Foundry.
In short, the item marked with a † has shuffled off this mortal coil, it has gone to meet it’s maker, to sing with the choir invisible; it is, not to put too fine a point upon it, an ex-modem (-Mfc, -Chip, -Chipset, -Family or -Type).
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These pages are a LAMP-development of the original Modem-Help, UK site (most of the old HTML pages still exist, but havn’t been updated for quite some time). That site, in it’s turn, was a transfer from the first html site on free-pages at Freeserve (sadly, now gone). The current format allows superb search facilities, customisation by Registered members, plus is quick ‘n’ easy to update.
Diligently put together in the UK by Alex Kemp. All efforts have been taken to ensure the veracity of what is written - if you know of any errors or omissions then please let us know.
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