[Coco] Fwd: IP packets on my coco

Salvador Garcia salvadorgarciav at yahoo.com
Wed Jun 8 13:05:34 EDT 2016

An important characteristic is the IRQ capability. However, this is only if the platform where it will be implemented can make use of it and the implications of using it. Another consideration is the chipside processing. For older, less capable computers, it is important that the chip do as much work as possible so that the main CPU is free to do other things.

I kind of leans towards the rtl8019, but feel that I lack the necessary in-depth tech info on the chip and the Color Computer in  order to make a more informed choice. Regards, Salvador

      From: RETRO Innovations <go4retro at go4retro.com>
 To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Wednesday, June 8, 2016 11:38 AM
 Subject: Re: [Coco] Fwd: IP packets on my coco
On 6/7/2016 4:16 PM, John W. Linville wrote:
> On Tue, Jun 07, 2016 at 12:40:29AM -0500, RETRO Innovations wrote:
>> On 6/7/2016 12:31 AM, Stephen H. Fischer wrote:
>>> What the ????
>>> I see the board image but it quickly is replaced with (Soft Porn?)
>> Hmmm, not sure what is going on there...  It didn't do that for me, but
>> postimage looks to be putting ads on the side...
>> Anyway, here is another version, off my web site, no ads:
>> http://go4retro.com/downloads/CocoNIC.png
> Ah...well, that is very tempting.  What do I have to do to get one??
> John

No big deal to get one prototyped.  The main question is:

rtl8019 or cs8900a

  * cs8900a pros
      o a bit more code available from the 65XX crowd
      o Slightly easier to produce, as I have all parts here.
      o AutoCRC?
  * cons
      o No IRQ capability.  You must poll for all packets
      o More expensive to produce (cs8900a is ~$10/pc)
  * rtl8019 pros
      o IRQ capability
      o A bit cheaper to produce ($rtl8019 is ~$5.00/pc)
  * cons
      o A bit less code from the 6XXX crowd
      o A bit tougher to produce, as I need to source the parts (not a
        huge deal)
      o No AutoCRC?

I know the 65XX crowd laments the lack of cs8900a IRQ, but the design is 
proven.  So, I leave it up to the community.


RETRO Innovations, Contemporary Gear for Classic Systems

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