Looks like when setting a graphic window using VDU 24, the origin is automatically set to the bottom left coordinate. in Original BBC BASIC it is set with an additional VDU 29 statement. Used the code below to test this behavior:
10 MODE 1
20 VDU 24,150;300;1100;700;
30 GCOL 0,129: CLG
40 MOVE 0,0
50 DRAW 1100,700
To have the same effect on my BBC Micro, I had to add the following line:
35 VDU 29,150;300;
Tested with the latest releases.
Looks like when setting a graphic window using VDU 24, the origin is automatically set to the bottom left coordinate. in Original BBC BASIC it is set with an additional VDU 29 statement. Used the code below to test this behavior:
10 MODE 1
20 VDU 24,150;300;1100;700;
30 GCOL 0,129: CLG
40 MOVE 0,0
50 DRAW 1100,700
To have the same effect on my BBC Micro, I had to add the following line:
35 VDU 29,150;300;
Tested with the latest releases.