We've just updated MediaWiki and its underlying software. If anything doesn't look or work quite right, please mention it to us. --RanAS
H/V Counter Latch: Difference between revisions
From SnesLab
(→References: hid archive URL) |
(see also) |
||
| Line 2: | Line 2: | ||
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]]. | ||
=== See Also === | |||
* [[H/V Count Timer]] | |||
=== References === | === References === | ||
Revision as of 16:52, 15 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.
See Also
References
- page 2-11-1 of Book I of the official Super Nintendo development manual
- https://problemkaputt.de/fullsnes.htm#snespputimersandstatus