MTX Registers: Difference between revisions
Document more matrix unit bits |
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==Matrix unit== | ==Matrix unit== | ||
There are two matrix units, one at +0x200, and the other one at +0x300 | There are two matrix units, one at +0x200 for vertical (Y) scaling, and the other one at +0x300 for horizontal (X) scaling. | ||
{| class="wikitable" border="1" | {| class="wikitable" border="1" | ||
| Line 76: | Line 76: | ||
|- | |- | ||
| 0 | | 0 | ||
| Enable bit | | Enable bit (?) | ||
|- | |- | ||
| 1 | | 1 | ||
| | | Enable vertical matrix | ||
|- | |- | ||
| 2 | | 2 | ||
| | | Enable horizontal matrix | ||
|- | |- | ||
| | | 4 | ||
| ??? | | ??? | ||
|- | |- | ||
| | | 5 | ||
| ??? | | ??? | ||
|- | |- | ||
| Line 94: | Line 94: | ||
|- | |- | ||
| 10-11 | | 10-11 | ||
| Output | | Output framebuffer rotation: 0 = normal, 1 = 90° CW (right), 2 = 180° CW (upside down, not mirrored), 3 = 270° CW (left) | ||
|- | |- | ||
| 12 | | 12 | ||
| | | Output tiling for use with the GPU. When set, the output width and height must be a multiple of 8. | ||
|- | |- | ||
| 15 | | 15 | ||
| ? | | Interrupt enable (?) | ||
|- | |- | ||
| 16 | | 16 | ||
| ? | | Data still available flag (?) | ||
|- | |- | ||
|} | |} | ||
| Line 114: | Line 114: | ||
|- | |- | ||
| 0-8 | | 0-8 | ||
| Output framebuffer width - 1 is written here | | Output framebuffer width - 1 is written here, 1 <= width <= 512 | ||
|- | |- | ||
| 16-25 | | 16-25 | ||
| Output framebuffer height - 1 is written here | | Output framebuffer height - 1 is written here, 1 <= height <= 512 | ||
|- | |- | ||
|} | |} | ||