■ Character reading direction
When bit 5 is 0, the vertical (Y) direction is drawn as it is without flipping up and down. When 1, it is drawn upside down.
∙ When bit 4 is 0, left and right are not reversed, and the horizontal (X) direction is drawn as it is. When 1, it is drawn with the left and right reversed.
∙ When both bits 4 and 5 are 0, the character pattern is drawn without inversion. When both bits 4 and 5 are 1, drawing is performed with the top and bottom and left and right reversed.
∙ For characters other than sprites, fix the character reading direction to 00B.
Dir | Reverse processing | |
Y | X | |
0 | 0 | Do not flip |
0 | 1 | Flip horizontally |
1 | 0 | Flip vertically |
1 | 1 | It will be flipped up, down, left and right. TD> |
Figure 6.4 Character reading direction
