Bits | Value | Meaning |
---|---|---|
0 – 3 | Graphic plot action? | |
4 | 0 | Alter foreground colour |
1 | Alter background colour | |
5 | 0 | R1 is colour number |
1 | R1 is pointer to ECF pattern | |
6 | 0 | Set graphics colour |
1 | Set text colour1 | |
7 | 0 | Write colour |
1 | Read colour 1 | |
6 – 31 | Reserved, must be zero |