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#109866 - 06/10/17 08:02 PM Re: ibm5170 - why preliminary? [Re: TSCHAK]  
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Justin Offline
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Justin  Offline
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Posts: 1,170
Vancouver Island, BC, Canada
IIRC, the 'ega' device in MAME is a rewrite that Judge never actually finished. In my experience it doesn't work as well as the EGA backwards compatibility in the 'vga' and 'svga' devices, which use the older pre-rewrite code.

#109867 - 06/10/17 09:14 PM Re: ibm5170 - why preliminary? [Re: TSCHAK]  
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R. Belmont Offline
R. Belmont  Offline

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USA
EGA mode on the VGA card is better than the EGA card? That's helpful to know, actually.

#109905 - 06/14/17 10:07 AM Re: ibm5170 - why preliminary? [Re: TSCHAK]  
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John Elliott Offline
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John Elliott  Offline
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I'll have a guess at the possible cause of the green tint. A real EGA card uses 6-bit colour (RrGgBb) for 350-line modes, but 4-bit colour (RGBI) for 200-line modes. Pin 6 of the connector is 'secondary green' in 350-line modes, but 'intensity' in 200-line modes.

So I suspect that the game has set up an RGBI palette, but MESS is rendering it as RrGgBb.

#109906 - 06/14/17 01:09 PM Re: ibm5170 - why preliminary? [Re: TSCHAK]  
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R. Belmont Offline
R. Belmont  Offline

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USA
That sounds very plausible actually.

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