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Multichannel Adapter Sigma-800

Discontinued, recommended replacement is: Tau-PCI


Multichannel Adapter Sigma-800 Features:
  • Eight full duplex serial ports
  • Up to 128 kbps
  • RS-232 Interface
  • Independent synchronous/asynchronous mode selection per port
  • Full modem control
  • Two independent baud rate generators per port for transmit and receive
  • Up to 48 RS-232 ports per a computer
  • DMA bus master
  • Certificate N OS/1-SPD-695 of Russian Ministry of Communications

The Sigma-800 is a middle speed (up to 128 kbps) synchronous/asynchronous adapter intended for use with IBM PC and compatible computers.

Sigma-800 adapter is based on the CL-CD2431 controller chip (a product of Cirrus Logic Corp., USA). It supports master mode DMA data transfer providing the most efficient use of the PC input/output bus. All eight serial ports are equipped with RS-232 interfaces. The adapter is software-configurable. Only I/O Base Address is jumper selectable.

The Cronyx-Sigma software allows to join several physical synchronous communication channels into one logical channel. For example, two channels with data rate 128 kbps, joined together, will create the logical channel with the overall throughput of 256 kbps.

A pair of Sigma-800 boards can be "daisy chained" to the same DMA channel and interrupt level by a short flat cable. This allows to install up to 6 multiplexers for a computer with up to 48 synchronous/asynchronous serial channels in total. Specifications

PC Bus Interface:
Bus Type ISA, 16 bit
I/O Base Address 200h - 3e0h, Jumper Selectable
I/O Address Space 32 Bytes
Interrupts IRQ 3, 5, 7, 10, 11, 12, 15, Software Selectable
DMA Channels DMA 5, 6, 7, Software Selectable
DMA Transfers Master Mode, Word Bursts
Addressable Memory 16 Mbytes
Serial Interfaces:
Interface Type RS-232
Maximum Data Transfer Rate 128 kbps
Internal Bit Rate Generators Independent per channel per direction
Synchronous Protocol HDLC
Asynchronous Transfer 5-8 Bits/Character, 1/1.5/2 Stop Bits, Parity Bit
Sync Mode Error Detection Cyclic Redundancy Check CRC-16, CRC V.41
Async Mode Error Detection Parity bit
Clock Options TXCIN, RXCIN, TXCOUT or DPLL, Software selectable per channel
Modem Control Signals DTR, DSR, CTS, RTS, CD
Board Size Height: 97 mm, Width: 170 mm
Operating Systems and Protocols
Windows NT/2000 PPP
FreeBSD 4.x, 5.x, 6.x
(FreeBSD 7.x is not supported)
PPP, Cisco/HDLC, Frame Relay
Linux PPP, Cisco/HDLC, Frame Relay


Некоторые документы хранятся в формате Adobe® Acrobat® Reader®

PDF  User's Manual in Russian
PDF  Driver Development Kit Manual in Russian
PDF Справочник по интерфейсным кабелям Cronyx.

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