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H/V Counter Latch: Difference between revisions
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The '''H/V Counter Latch''' (SLHV, or Software Latch Horizontal/Vertical) is a dummy read-only [[ | The '''H/V Counter Latch''' (SLHV, or Software Latch Horizontal/Vertical) is a dummy read-only [[S-PPU1]] register located at 2137h. | ||
Its sole purpose is to cause the PPU to latch the current raster beam position into OPHCT and OPVCT when it is read. | Its sole purpose is to cause the PPU to latch the current raster beam position into OPHCT and OPVCT when it is read. | ||
The value read is [[open bus]]. | The value read is [[open bus]]. | ||
Revision as of 22:56, 4 July 2023
The H/V Counter Latch (SLHV, or Software Latch Horizontal/Vertical) is a dummy read-only S-PPU1 register located at 2137h. Its sole purpose is to cause the PPU to latch the current raster beam position into OPHCT and OPVCT when it is read. The value read is open bus.
References
- page 2-11-1 of official Super Nintendo development manual: https://archive.org/details/SNESDevManual/book1/page/n76