Palette Index Register: Difference between revisions

Revision as of 21:03, 22 December 2018

Next Register Number	$40
Readable	Yes
Writable	Yes
Short Description	Chooses an ULANext palette index to configure.

Palette indices 0-127 are INK colours. Entries 0-7 are the standard Spectrum INK colours (except full ink colour mode, when all 0-255 indices are INK colour).

Palette indices 128-255 are PAPER colours. Entries 128-135 are the standard Spectrum PAPER colours and BORDER colours (even in "full INK" mode).

Higher colours can only be used by enabling ULANext mode via NextReg:$43.

Layer 2 and Sprite palettes work as "full ink" always, INK/PAPER concept does apply only to Enhanced ULA palette.

@@ Line 1: / Line 1: @@
 {{NextRegister
 |Number=$40
-|Readable=No
+|Readable=Yes
 |Writable=Yes
-|ShortDesc=Chooses a ULANext palette number to configure.
+|ShortDesc=Chooses an ULANext palette index to configure.
 }}
+Palette indices 0-127 are INK colours. Entries 0-7 are the standard Spectrum INK colours (except full ink colour mode, when all 0-255 indices are INK colour).
-Palette numbers from 0-127 are INK colors. Entries 0-7 are the standard Spectrum INK colors.
+Palette indices 128-255 are PAPER colours. Entries 128-135 are the standard Spectrum PAPER colours and BORDER colours (even in "full INK" mode).
-Palette numbers from 128-255 are PAPER colors. Entries 0-7 are the standard Spectrum PAPER colors and border colors.
+Higher colours can only be used by enabling ULANext mode via {{NextRegNo|$43}}.
-Higher colors can only be used by enabling ULANext mode via {{NextRegNo|$43}}.
+Layer 2 and Sprite palettes work as "full ink" always, INK/PAPER concept does apply only to Enhanced ULA palette.