[Coco] Accessing Vsync & Hsync interrups from Nitros9

[Barry Nelson]

> Date: Sun, 12 Apr 2020 14:37:27 +0800
> From: Walter Zambotti <zambotti at iinet.net.au>
> To: coco at maltedmedia.com
> Subject: Re: [Coco] Accessing Vsync & Hsync interrups from Nitros9
> Message-ID: <3273a9e4-174e-4109-3795-367696c4bc36 at iinet.net.au>
> Content-Type: text/plain; charset=utf-8
> 
> I figured out why it isn't working but not sure why that is the case.
> 
> The Nil device only works as long as I don't open a VDG /v1 window.
> 
> The moment I do that the /Nil device refuses to be opened.
> 
> If I kill the /v1 window tstfs2 starts working immediately.
> 
> So seems to be some sort of incompatibility between the devices?!?!?
> 
> Which is a problem because my application only works from a VDG term window!
> 
> Any ideas guys?
> 
> 
> Walter

You are probably running out of space on the 64k system page. When you open and allocate the memory for a VDG window, there is not enough memory left on the system page for /nil to initialize. You could try setting up your boot to start with a console terminal that is a VDG window and try removing other windows or drivers that you don’t need.