[Coco] Re: Mocha & OS9

[Paul T. Barton]

--- John Collyer <johncollyer at zoominternet.net>
wrote:
> I seen that too, but I'm not sure what it
> means.
> I looked in the Disk Basic Unravelled Series
> and it has a section about the FDC.  Did you
> look at this source?
> 
> John Collyer
> 
> ----- Original Message ----- 
> From: "Brad Grier" <bradgrier at cox.net>
> To: <coco at maltedmedia.com>
> Sent: Wednesday, January 28, 2004 9:59 AM
> Subject: [Coco] Re: Mocha & OS9
> 
> 
> > Robert Gault wrote:
> > 
> > > Brad Grier wrote:
> > > 
> > >> I'm trying to get OS9 working in Mocha but
> I have a bug in the disk 
> > >> emulation. It *appears* the NMI interrupt
> is firing when it shouldn't 
> > >> be. My docs on the FDC are pretty sketchy
> - is there a flag in one of 
> > >> the registers that turns off the NMI?
--snipped--

The only way to mask NMI is to NEVER set
the 6809E S register.
But, by the time the Coco3 has booted, :-)

Paul


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/