[Coco] Tcp off-loading on CoCo

[Zippster]

Yes, on the CoCo1/2 interrupts generated by the keyboard PIA go to IRQ. 
The DAC PIA handles the cart interrupt and goes to FIRQ.

- Ed


> On Apr 13, 2017, at 11:44 AM, William Astle <lost at l-w.ca> wrote:
> 
> On 2017-04-13 10:29 AM, L. Curtis Boyle wrote:
>> The cart interrupt might be a better option (it can be IRQ, not just FIRQ, right?), as you can shut that on or off at will. So, if a routine knew that polling would be better for it’s situation, it could shut the IRQ off, and poll. If it preferred an IRQ (to block read a bunch of data after completed packets are in - read it like a disk drive sector), it could do that as well.
> 
> The cart interrupt is hard wired to the FIRQ on the coco1/2 (via PIA1 I believe). On the coco3 it can be routed to IRQ, FIRQ, both, or neither through the GIME.
> 
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