STATUS CRT register;value ! returns status or values for the following registers:
0 - Print Column. Left most column is one.
1 - Print Row. Top line is one.
2 - Insert/Replace Mode. 1 = insert mode, 0 = replace mode.
3 - Number of lines in the extended output area that are above the top line of the screen.
4 - Display Functions Mode. 1 = on, 0 = off.
5 - Default ALPHA screen color. The value does not show changes made using registers 15, 16, 17 and CHR$() character attributes.
6 - ALPHA ON/OFF flag.
7 - GRAPHICS ON/OFF flag.
8 - Current print column of the display line. The left most column is one.
9 - Screen Width.
10 - Cursor visibility. 1 = cursor on. 0 = cursor off.
11 - CRT character-mapping-disable flag. Always a 0 in HTBasic.
12 - Softkey Menus mode.
13 - CRT Height.
14 - not supported (Display Replacement Rule)
15 - PRINT/DISP Color.
16 - Softkey Menu Color.
17 - Input Line Color.
18 - Alpha write-enable mask. (set by the MERGE ALPHA and SEPARATE ALPHA statements on bit-mapped displays).
19 - not supported (ALPHA MASK)
20 - not supported (ALPHA display-enable mask)
21 - not supported Compatibility mode. Not supported by HTBasic.
100 - Alternate Attribute Control range. 1 = Alternate range, 0 = normal range.
110 - Dithering status: 0 = Dithering possible; 1 = No Dithering.
