Re: [ethmac] first topics

[Jeff Garzik <jgarzik@mandrakesoft.com>]

Novan Hartadi wrote:
> On Fri, 7 Apr 2000, Jeff Garzik wrote:
> > My suggestion for an architecture:

> > All 32-bit registers.
> > Command buffered.
> > Variable receive and transmit descriptor lists and frame sizes.

> Does these descriptors manage frame in transmit and receive FIFO ?

With the RTL-8139 chip, there is a separate transmit and receive FIFO,
and data is spilled from the FIFO into the descriptors (or ring
buffer).  I'm not sure about Tulip, I would presume some sort of on-chip
FIFO, however small, before data gets tossed into the buffers residing
in main memory via a DMA burst.

	Jeff



-- 
Jeff Garzik              | Nothing cures insomnia like the
Building 1024            | realization that it's time to get up.
MandrakeSoft, Inc.       |        -- random fortune