Clip Window Control Register: Difference between revisions
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Fixing read/write vs index auto increment description, thanks to Garry help on Facebook to identify the mistake |
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Each read index maps as 0: X1, 1: X2, 2: Y1 and 3: Y2 (the same order how the coordinates are | Each read index maps as 0: X1, 1: X2, 2: Y1 and 3: Y2 (the same order how the coordinates are written to particular clip-window register). | ||
Revision as of 23:17, 6 January 2019
| Number | TBRegisterNumber::$1C |
|---|---|
| Readable | TBRegisterReadable::Yes |
| Writable | TBRegisterWritable::Yes |
| Short Description | ShortDesc::Controls (resets) the clip-window registers indices. |
Write:
| Bit | Function |
|---|---|
| 7-3 | Reserved, must be 0 |
| 2 | reset the ULA/LoRes clip-window register index (by writing 1). |
| 1 | reset the Sprite clip-window register index (by writing 1). |
| 0 | reset the Layer 2 clip-window register index (by writing 1). |
Read:
| Bit | Function |
|---|---|
| 7-6 | Reserved |
| 5-4 | the current Layer 2 clip-window register index |
| 3-2 | the current Sprite clip-window register index |
| 1-0 | the current ULA/LoRes clip-window register index |
Each read index maps as 0: X1, 1: X2, 2: Y1 and 3: Y2 (the same order how the coordinates are written to particular clip-window register).