sward@cfa.HARVARD.EDU (Steve Ward, CF) (03/01/91)
Could someone briefly describe the programming model of the Novell (and compatibles) NE-2000 16-bit PC Ethernet controller board? I am aware it uses the National 8390 controller and I know basically how the 8390 works. What I need to know is whether the NE-2000 uses both 8390 Local DMA and 8390 Remote DMA, where the local DMA is to/from an onboard 16KB S-RAM buffer (what is the base memory address if accessible at all from the bus?) and where the Remote DMA is via bidirectional 16-bit latches on the bus (what is the port(s) address?) Also, what are the port addresses for the 8390 controller itself, etc. Are IRQ interrupts used in conjunction with the remote dma latches or are they polled or are they accessed via pcbus dma or any one of the foregoing? I have a technical reference for the 8390 chip so I do not need any detailed tech. info on the controller chip itself. I just need a basic description of the implementation architecture along with pc bus interface info. Thanks in advance for the help! sward@cfa.harvard.edu Steven Ward sward@cfa.harvard.edu (617)495-7392