[Coco] Color Error in VCC

[Bill Pierce]

Mr Gault, did you run it on VCC? I don't remember seeing these colors on a real Coco. Luis was running VCC and not a Coco. I'm out of town for the rest of the week so I can't get to my Coco right now and compare. But what I am seeing on VCC is (in the graphics blocks above 128):

Green FG / White BG
Yellow FG / White BG
Blue FG / White BG
White FG / White BG
Cyan FG / White BG
Magenta FG / White BG
Orange FG / White BG

In Jeff's Coco 2 Emul. All are the same except Background is BLACK
In Jeff's Coco 3 Emul.  "   "     "      "        "             "           "     "
In David's Coco 3 Em. "   "     "      "        "             "           "     "
In David's Coco 2 Em. "   "     "      "        "             "           "     "
In MESS Coco 2 Em. "   "     "      "        "             "           "     "
In MESS Coco 3 Em. "   "     "      "        "             "           "     "

In all my years of Cocos... 1, 2, and 3 ... Background color has ALWAYS been BLACK


Music from the Tandy/Radio Shack Color Computer 2 & 3 
https://sites.google.com/site/dabarnstudio/
Bill Pierce
ooogalapasooo at aol.com




-----Original Message-----
From: Robert Gault <robert.gault at att.net>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Thu, Mar 8, 2012 11:02 am
Subject: Re: [Coco] Color Error in VCC


Luis Fernández wrote:

   HI
 I found a mistake in the colors emulated by VCC.
 he error is basic and wonder to occur.
 A simple test program is

 10 CLS
 20 FOR A=0 TO 255
 30 POKE 1024+A,A
 40 NEXT
 50 GOTO 50

   http://luis45ccs.blogspot.com/2012/03/error-de-color-en-el-emulador-de-color.html








 Apparently my right colors are not correct
 coconut lit my TV and found the following
 color
 0 Green
 1 Yellow
 2 Dark Blue
 3 Purple or violet
 4 White
 5 green somewhat darker
 6 Light blue, purple something
 7 Orange

   		 	   		

Luis,
Whatever you are seeing, it is not the result of VCC. I just ran a test with a 
S Coco3 using both RGB and Composite 60Hz monitors. Before running your 
rogram, either the RGB or CMP commands were used to get an appropriate color 
et. The colors displayed on the matching monitor were a very close match to the 
colors displayed by VCC 1.42 on a Samsung SyncMaster 204B digital monitor. The 
MP and RGB monitor colors were very close to each other but not a perfect 
atch, starting with the appropriate color set.
Now with the real hardware, it was necessary to adjust brightness, contrast, 
olor intensity, and tint. If that was not done, the colors were not quite what 
hey should have been. That should not be a surprise as the Coco can't exactly 
atch CMP and RGB colors given the small range of possible colors.
The Coco3 and therefore VCC default to the CMP color set. There may be small 
ifferences in color between NTSC and PAL sets or even 60 and 50Hz units. Your 
rogram does not force the use of a specific color set, and it should if you 
ant any chance of getting appropriate colors.
Robert

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