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the NTSC sc-3000 uses a real TMS chip. I expected the palette to be similar to http://aorante.blogspot.com.es/2011/10/paleta-vdp-de-los-msx-1.html.
I also tried to compute the colors myself from this datasheet table

and I obtained the palette I attach. The palette pretty much coincides with Drushel's one.

However, color 9 seem much more orange on the hardware than it is in the aforementioned palettes. I tried on three different monitors, and all gave a similar results.

To test the palette on the hardware I wrote the rom I attach.
Controller commands are as follows
hold right/left = change background color
hold up/down = change foreground color
hold 1st button = cycle pattern of the top part of the screen
hold 2nd button = cycle pattern of the bottom part of the screen

Is it my particular unit or is it something common? could someone confirm with his hardware?

Looking at the schematic

I wonder why there's R10, I would have expected a normal emitter follower configuration,that is the collector tied to VCC. I also do not understand the role of C29...

palette.png (4.02 KB)

es5LS.png (99.39 KB)

SC3vdp.png (7.83 KB)

singleColor.zip (2.77 KB)

rom used for the test

This is what I get on my PAL SC-3000 with S-video mod. I am pleased with that orange color myself.
I cannot run any test ROMs for the time being, this photo is from much earlier time.

TMScolors.jpg (344.67 KB)

PAL SC-3000 with S-video mod

Author	Message
kamillebidan Joined: 25 Feb 2013 Posts: 386 Location: Osaka	Palette of the real SC-3000 Posted: Wed Sep 10, 2014 4:55 pm
	the NTSC sc-3000 uses a real TMS chip. I expected the palette to be similar to http://aorante.blogspot.com.es/2011/10/paleta-vdp-de-los-msx-1.html. I also tried to compute the colors myself from this datasheet table and I obtained the palette I attach. The palette pretty much coincides with Drushel's one. However, color 9 seem much more orange on the hardware than it is in the aforementioned palettes. I tried on three different monitors, and all gave a similar results. To test the palette on the hardware I wrote the rom I attach. Controller commands are as follows hold right/left = change background color hold up/down = change foreground color hold 1st button = cycle pattern of the top part of the screen hold 2nd button = cycle pattern of the bottom part of the screen Is it my particular unit or is it something common? could someone confirm with his hardware? Looking at the schematic I wonder why there's R10, I would have expected a normal emitter follower configuration,that is the collector tied to VCC. I also do not understand the role of C29... palette.png (4.02 KB) es5LS.png (99.39 KB) SC3vdp.png (7.83 KB) singleColor.zip (2.77 KB) rom used for the test

TmEE Joined: 31 Oct 2007 Posts: 853 Location: Estonia, Rapla city	Posted: Fri Sep 12, 2014 7:45 am
	This is what I get on my PAL SC-3000 with S-video mod. I am pleased with that orange color myself. I cannot run any test ROMs for the time being, this photo is from much earlier time. TMScolors.jpg (344.67 KB) PAL SC-3000 with S-video mod

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