[Coco] Syscall to get the window screen and width

[plt]

I am not sure if this will the screen width and length but can you provide
a example of how to do the system call and get the return results please?

How can you get the current window if /w1 or /w2?

Chapter 9. System Calls NitrOS-9 EOU Technical Reference Manual
SS.ScSiz Returns the window or screen size
Function Code $26
Entry Conditions:
A path number
B $26
Exit Conditions:
X number of columns on screen/window
Y number of rows on screen/window
Error Output:
CC carry set on error
B error code, if any

Chapter 9. System Calls NitrOS-9 EOU Technical Reference Manual
SS.ScSiz Returns the window or screen size
Function Code $26
Entry Conditions:
A path number
B $26
Exit Conditions:
X number of columns on screen/window
Y number of rows on screen/window
Error Output:
CC carry set on error
B error code, if any

Additional Information:

• Use this call to determine the size of an output screen. The values
returned
depend on the on device in use:
◦ For non-VTIO devices, the call returns the COL and ROW values in the
device descriptor.
◦ For VTIO/CoVDG devices, the call returns the size of the window or
screen in use by the specified device (32x16).
◦ For window devices, the call returns the size of the of the current
working area of the window.
• This call is handled by CoVDG, CoGrf/CoWin, SC6551, SC6850, S16550 (and
any future serial port drivers).