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From: Yves Lepage <yves@CC.McGill.CA>
Date: Wed, 22 May 96 12:08:15 -0400
To: freebsd-hackers@freebsd.com
Subject: SDL  cards
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Hi all,

I was asked to find out how hard it would be to get support in FreeBSD
for SDL Communication synchronous boards. This is in preparation for
the Inet 96 conference.

Anyone here is already using them with FreeBSD machines?

Here is the info about these cards:

The RISCom/N2pci is low-cost, high performance synchronous dual port adapter for the PCI bus. The  
N2pci combines the power of the Hitachi HD64570 Serial Communication Adapter (SCA) and a high  
performance 32-bit PCI Bus Mastering Interface. The N2pci will support two full duplex HDLC/SDLC  
speeds from 56Kbps to T1/E1 speeds on each port. The N2pci performs the function of a 32-bit PCI  
Direct Bus master, allowing SCA DMA operations directly into PC Host Memory.

32-Bit PCI Bus Master

The N2pci has a high performance 32-bit PCI bus interface Controller which supports burst bus  
transfers at 132 Mbps. The PC host can program the SCA for Block DMA transfers directly in and out  
of Host Memory or other Memory Mapped PCI peer devices. The architecture for SDL's N2pci adapter  
is illustrated in Figure 1.

Software Development Support

All applications developed for SDL's popular RISCom/N2 card, will run with minimal modification  
on the N2pci. The N2pci is available with a comprehensive set of Development Tools, Diagnostics  
and Drivers for DOS, OS/2, WINDOWS-NT and popular versions of UNIX.

FEATURES

* Hitachi HD64570 SCA
* Two Full Duplex DMA Ports
* 32-bit PCI Bus Master Interface
* 132 MBps burst / 40 MBps sustained
* HDLC/SDLC Speeds to 12 Mbps
* Software Selectable Interfaces
* RS232, EIA530, X.21, V.35 & Custom Interfaces
* OEM I.D. Support

APPLICATIONS

* Frame Relay Access
* X.25 Access
* Internet Access
* Bridge & Routers


Thanks in advance.
Yves Lepage