[Coco] Access to 225 lines in BASIC

[Nick Marentes]

On 21/10/2014 3:54 AM, Robert Gault wrote:
>
> So far so good, but you wanted 225 lines. That gets very tricky as it 
> requires 160x225=$8CA0 bytes but Task1 (used for hi-res graphics) 
> currently has $8000 bytes available.
>
> I have been able to make Basic use 225 lines in HSCREEN2 mode but it 
> requires tricking Basic into using an additional MMU block in Task1. 
> If you try all the needed POKEs at once, Basic crashes. You have to 
> gradually increase the amount of memory used by HCLS at $E6E6 until 
> the full $8CA0 amount has been accessed.
>
> As yet I've not been able to force the 320x225x16 mode in a single 
> pass of a Basic program.
>
> If you want a demo program, let me know.
>
> Robert
>
>

I've managed to alter my screen layout to accomodate the 200 lines. 208 
was the target but this was difficult for the reason you explained.

Thanks