Controllerless V.90/K56flex PCI Twin-chip Chipsets
Usage: To find other modems with the same chipset.
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 before 23 Dec 1997, 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.
See also the low-power variant RL56HCFL-PCI. The RCV56HCF-PCI & RH56D-PCI appear to have been a co-development, distinguished only by the type of packaging for the DSP chip (TQFP for this, PQFP for the RH56D-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)
- RCV56HCF-PCI - R6785 (twin) - this chipset
- RCV56HCF-PCI - R7156 (BGA)
The Reference Designs for these chipsets were pin-compatible with their equivalent RS56-PCI (soft) chipsets, allowing one set of work to produce 2 modems. This was the better chipset & sold at a premium, although the difference in cost between the chips was negligible. Drivers are not inter-changeable between 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)
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Compilation, original writings & design Copyright ©2002 - 2008 Modem-Help, Ltd.
All trademarks respected as the property of their respective owners.
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Quick Stats
Items available:
- 10,925 modems
- 1,430 chipsets
- 2,025 chips
- 731 modem mfcs
- 118 comp/MB mfcs
- 1,651 comps/MBs/retail
- 138 chipset mfcs
- 13,472 external web links
- 64,485 hardware IDs
- 87,525 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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