LoRes X Scroll Register: Difference between revisions

Revision as of 14:27, 11 November 2019

Number	TBRegisterNumber::$32
Readable	TBRegisterReadable::Yes
Writable	TBRegisterWritable::Yes
Short Description	ShortDesc::Pixel X offset (0..255) to use when drawing LoRes Layer.

bits 7-0 = X Offset (0-255) (Reset to 0 after a reset)

LoRes scrolls in "half-pixels" at the same resolution and smoothness as Layer 2.

@@ Line 3: / Line 3: @@
 |Readable=Yes
 |Writable=Yes
-|ShortDesc=Pixel offset to use when drawing ULA or LoRes Layer.
+|ShortDesc=Pixel X offset (0..255) to use when drawing LoRes Layer.
 }}
 bits 7-0 = X Offset (0-255) (Reset to 0 after a reset)
-ULA screen at this moment scrolls horizontally only by whole "characters" (by multiples of 8 pixels), the low 3 bits of offset value are ignored (as of core 2.00.26, may get modified/updated in later cores to scroll per single pixel also horizontally).
 LoRes scrolls in "half-pixels" at the same resolution and smoothness as Layer 2.
-'''NEW in core 3.0:'''
-This is now LoRes only offset, ULA will have it's own registers $26 and $27 (to be added to wiki)
-(also it's not 100% clear to me if this split did happen already in the version delivered to factory, or it will happen in the following bugfix update, but it should eventually happen).
-(I will update + cleanup this over time as I will be able to verify all the info)