Lee Jones wrote:

[snip]

> As I recall, the 3Com 3C503 meets these criteria.
>
> Then you have to either get the programming information for the
> ISA Ethernet card from the manufacturer or by reverse-engineering.
> Any card will have some Ethernet controller chip, but you need to
> know where the buffers live, how to toggle the support circuitry,
> and all the minutea of initializing it and handling packets.
[snip]

If you choose your card wisely, you can get 8086 assembly code for the
packet driver.  For instance the CRNWYR packet drivers support 3c503, as
does Linux.  Linux comes with C source, CRNWYR with asm source.

Darren