dave at davebiz.com
Tue Sep 27 14:13:40 EDT 2016
Good work, Brett!
On 9/27/2016 12:43 PM, Brett Gordon wrote:
> Yesterday, I got Jim Card's working with Fuzix here's a demo:
> On Sat, Sep 24, 2016 at 4:55 PM, RETRO Innovations <go4retro at go4retro.com>
>> 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.
>> Coco mailing list
>> Coco at maltedmedia.com
More information about the Coco