[Coco] NitrOS-9 Tools for the CoCoIOn Ethernet Card

[Mark D. Overholser]

On 5/27/22 14:14, Allen Huffman via Coco wrote:
> 

<< SNIP >>

> 
> It is or is not a 16550 Interface? Or just interface to SPI/I2C of
> the wiznet?
> 

Allen:

The CoCoIO uses the following two, CoCo Memory ranges:

FF60–FF67  or FF70-FF77   16550
FF68–FF6B  or FF78-FF7B   W5100
FF6C-FF6F  or FF7C-FF7E*  unused


The WizNet5100 has Four Bytes for Access in the Indirect Bus Mode...

The First is the Init/Reset/Mode.
The Second and Third are a 16 Value to access the WizNet's Internal 32KB 
Memory Map.
And the Fourth is the Byte to Read or Write at the Location set by Bytes 
Two and Three...



MarkO