Re: DMA successes with Verilog

From: Jim Brain <*brain_at_jbrain.com*> Date: Thu, 14 Jun 2018 00:02:24 -0500 Message-ID: <3fce8daf-ca81-3521-49a8-804b9fa3c416@jbrain.com> · brain_at_jbrain.com

On 6/13/2018 3:47 PM, smf wrote:
> On 13/06/2018 18:53, Jim Brain wrote:
>>
>
> I would have thought that there would be a safe point if you trigger 
> an nmi and switch to ultimax mode when it fetches the vector, have the 
> ultimax nmi handler just return and switch out of ultimax mode.
If you can guarantee the NMI will occur (I think Marko showed that you 
can trigger it and not ack an NMI, which would hold the NMI line down, 
preventing NMI from working), then your idea would work.
>
>
>

-- 
Jim Brain
brain@jbrain.com
www.jbrain.com