[Coco] CocoNIC

[Dave Philipsen]

Good work, Brett!


Dave


On 9/27/2016 12:43 PM, Brett Gordon wrote:
> Yesterday, I got Jim Card's working with Fuzix here's a demo:
>
> https://www.youtube.com/watch?v=yBuQoY5Kc1U
>
> enjoy!
>
> -brett
>
> On Sat, Sep 24, 2016 at 4:55 PM, RETRO Innovations <go4retro at go4retro.com>
> wrote:
>
>> On 9/24/2016 3:11 PM, Brett Gordon wrote:
>>
>>>        o For everyone's reference, to convert from 65/68XX signalling to
>>>>          Intel/ISA, here are the equations:
>>>>            + assign _iow =              !(ce_nic & !r_w & e);
>>>>            + assign _ior =              !(ce_nic & r_w & e);
>>>>            + gating with E is important on both read and write
>>>>
>>> Thanks for sharing that.  I believe its important to our small community
>>> that nuggets of helpful info are free and open.  So from the little I
>>> understand of hardware, it looks as if ISA busses have a separate read and
>>> write lines, where the m6809 has one?
>>>
>> Yes, Motorola logic (and 65XX, since the MOS guys all came from Moto after
>> the 6800), uses CLK (E), !CE, and R/!W, while Intel uses CS (chip select),
>> RD, and WR.  Sometimes, CLK is not used, but if not, then CE is assumed ot
>> be gated with E if needed.
>>
>>> All nice features.  Not sure about a coco router, though, I'm guessing the
>>> code for such would actually be easier than a full tcp/ip stack :)
>>>
>> C'mon, you know you want to try it, if only to say you got it to work.
>>
>> Jim
>>
>>
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