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-rw-r--r--src/mess/drivers/a7800.c88
1 files changed, 44 insertions, 44 deletions
diff --git a/src/mess/drivers/a7800.c b/src/mess/drivers/a7800.c
index 75c529c71b2..52394423c3b 100644
--- a/src/mess/drivers/a7800.c
+++ b/src/mess/drivers/a7800.c
@@ -70,7 +70,7 @@
2013/11/03 Robert Tuccitto Fixed correctly typo under 26.7 7$.
- 2014/11/23 Robert Tuccitto Added NTSC Palette Notes
+ 2014/11/23 Robert Tuccitto Added NTSC Palette Notes
***************************************************************************/
#include "emu.h"
@@ -159,60 +159,60 @@ INPUT_PORTS_END
/***************************************************************************
Atari 7800 NTSC Palette Notes:
-Palette on a modern flat panel display (LCD, LED, Plasma, etc.) appears
-different from a traditional CRT. The most outstanding difference is Hue 1x,
-the hue begin point. Hue 1x looks very 'green' (~-60 to -45 degrees -
-depending on how poor or well it handles the signal conversion and its
-calibration) on a modern flat panel display, as opposed to 'gold' (~-33
-degrees) on a CRT.
+Palette on a modern flat panel display (LCD, LED, Plasma, etc.) appears
+different from a traditional CRT. The most outstanding difference is Hue 1x,
+the hue begin point. Hue 1x looks very 'green' (~-60 to -45 degrees -
+depending on how poor or well it handles the signal conversion and its
+calibration) on a modern flat panel display, as opposed to 'gold' (~-33
+degrees) on a CRT.
-The system's pot adjustment manually manipulates the ratio of blue to
-green/blue to red, while the system 'warming-up' causes the palette phase
+The system's pot adjustment manually manipulates the ratio of blue to
+green/blue to red, while the system 'warming-up' causes the palette phase
shift to go higher in degrees.
-At power on, the system's phase shift appears as low as ~23 degrees and
-after a considerable consistent runtime, can be as high as ~28 degrees.
-
-In general, the low end of ~23 degrees lasts for maybe several seconds,
-whereas higher values such as ~25-27 degrees is the most dominant during
-system run time. 180 degrees colorburst takes place at ~25.7 degrees (A
-near exact match of Hue 1x and 15x - To the naked eye they appear to be
-the same).
-
-However, if the system is adjusted within the first several minutes of
-running, the warm up, consistent system run time, causes Hue 15x (F$) to
-become stronger/darker gold (More brown then ultimately red-brown); as well
-as leans Hue 14x (E$) more brown than green. Once achieving a phase shift
-of 27.7, Hue 14x (E$) and Hue 15x (F$) near-exact match Hue 1x and 2x
-respectively.
-
-Therefore, an ideal phase shift while accounting for the reality of
-shifting while warming up, as well as maintaining differences between 1x,
-2x and 14x, 15x, would likely fall between a 25.7 and 27.7. Phase shifts
-26.2 degrees and 26.7 degrees places Hue 15x (F$) between Hue 1x and
-Hue 2x, having 26.2 degrees leaning closer to Hue 1x and 26.7 degrees
+At power on, the system's phase shift appears as low as ~23 degrees and
+after a considerable consistent runtime, can be as high as ~28 degrees.
+
+In general, the low end of ~23 degrees lasts for maybe several seconds,
+whereas higher values such as ~25-27 degrees is the most dominant during
+system run time. 180 degrees colorburst takes place at ~25.7 degrees (A
+near exact match of Hue 1x and 15x - To the naked eye they appear to be
+the same).
+
+However, if the system is adjusted within the first several minutes of
+running, the warm up, consistent system run time, causes Hue 15x (F$) to
+become stronger/darker gold (More brown then ultimately red-brown); as well
+as leans Hue 14x (E$) more brown than green. Once achieving a phase shift
+of 27.7, Hue 14x (E$) and Hue 15x (F$) near-exact match Hue 1x and 2x
+respectively.
+
+Therefore, an ideal phase shift while accounting for the reality of
+shifting while warming up, as well as maintaining differences between 1x,
+2x and 14x, 15x, would likely fall between a 25.7 and 27.7. Phase shifts
+26.2 degrees and 26.7 degrees places Hue 15x (F$) between Hue 1x and
+Hue 2x, having 26.2 degrees leaning closer to Hue 1x and 26.7 degrees
leaning closer to Hue 2x.
-The above notion would also harmonize with what has been documented for
-the colors of 1x, 2x, 14x, 15x on the 7800. 1x = Gold, 2x = Orange,
-14x (E$) = Orange-Green. 15x (F$) = Light Orange. Color descriptions are
-best measured in the middle of the brightness scale. It should be
+The above notion would also harmonize with what has been documented for
+the colors of 1x, 2x, 14x, 15x on the 7800. 1x = Gold, 2x = Orange,
+14x (E$) = Orange-Green. 15x (F$) = Light Orange. Color descriptions are
+best measured in the middle of the brightness scale. It should be
mentioned that Green-Yellow is referenced at Hue 13x (D$), nowhere near
-Hue 1x. A Green-Yellow Hue 1x is how the palette is manipulated and
+Hue 1x. A Green-Yellow Hue 1x is how the palette is manipulated and
modified (in part) under a modern flat panel display.
-Additionally, the blue to red (And consequently blue to green) ratio
-proportions may appear different on a modern flat panel display than a CRT
-in some instances for the Atari 7800 system. Furthermore, you may have
+Additionally, the blue to red (And consequently blue to green) ratio
+proportions may appear different on a modern flat panel display than a CRT
+in some instances for the Atari 7800 system. Furthermore, you may have
some variation of proportions even within the same display type.
-
-One side effect of this on the console's palette is that some values of
-red may appear too pinkish - Too much blue to red. This is not the same
-as a traditional tint-hue control adjustment; rather, can be demonstrated
+
+One side effect of this on the console's palette is that some values of
+red may appear too pinkish - Too much blue to red. This is not the same
+as a traditional tint-hue control adjustment; rather, can be demonstrated
by changing the blue ratio values via MESS HLSL settings.
-Lastly, the Atari 2600 & 5200 NTSC color palettes hold the same hue
-structure order and have similar appearance differences that are dependent
+Lastly, the Atari 2600 & 5200 NTSC color palettes hold the same hue
+structure order and have similar appearance differences that are dependent
upon display type.
***************************************************************************/
/***************************************************************************