[Simh] TOPS-20 Source with KMC11 Driver Code?

[Robert Jarratt]

> -----Original Message-----
> From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-
> edge.com] On Behalf Of Rich Alderson
> Sent: 08 May 2013 01:02
> To: hecnet at update.uu.se; simh at trailing-edge.com
> Subject: Re: [Simh] TOPS-20 Source with KMC11 Driver Code?
> 
> > From: "Robert Jarratt" <robert.jarratt at ntlworld.com>
> > Date: Tue, 7 May 2013 23:33:36 +0100
> 
> > Can anyone point me at the right place to look at TOPS-20 driver code
> > for the KMC11? I can see that it is trying to get the Microprocessor
> > to do something and read back some values, but I don't know what
> > values it wants to get and so it reports:
> 
> Hi, Rob,
> 
> http://pdp-10.trailing-edge.com/tops20v41_monitor_sources/index.html
> 
> You want the file KDPSRV.MAC in that directory.
> 
>                                                                 Rich
> _______________________________________________
> Simh mailing list
> Simh at trailing-edge.com
> http://mailman.trailing-edge.com/mailman/listinfo/simh


I am making some progress with getting the KMC/DUP emulation working in SIMH
for TOPS-20. At the moment I am stuck on one thing, which is the interrupts
to tell the OS that the KMC has processed a buffer. The OS sets the
interrupt enable bit and when I have something to report to the OS I set the
relevant interrupt bit. However, nothing happens when I do that. I am
wondering if I have the right interrupt bit? I am using bits 8 and 9
(decimal). 

I am not sure how to find out which bit I should be setting.

Can anyone help?

Regards

Rob